diff --git a/src/main/scala/ScalatraBootstrap.scala b/src/main/scala/ScalatraBootstrap.scala
index b266261..30c507a 100644
--- a/src/main/scala/ScalatraBootstrap.scala
+++ b/src/main/scala/ScalatraBootstrap.scala
@@ -27,9 +27,10 @@
     }
 
     context.mount(new IndexController, "/")
+    context.mount(new ApiController, "/api/v3")
     context.mount(new FileUploadController, "/upload")
+    context.mount(new SystemSettingsController, "/admin")
     context.mount(new DashboardController, "/*")
-    context.mount(new SystemSettingsController, "/*")
     context.mount(new AccountController, "/*")
     context.mount(new RepositoryViewerController, "/*")
     context.mount(new WikiController, "/*")
diff --git a/src/main/scala/gitbucket/core/controller/AccountController.scala b/src/main/scala/gitbucket/core/controller/AccountController.scala
index 54bdc58..5ddc010 100644
--- a/src/main/scala/gitbucket/core/controller/AccountController.scala
+++ b/src/main/scala/gitbucket/core/controller/AccountController.scala
@@ -1,7 +1,6 @@
 package gitbucket.core.controller
 
 import gitbucket.core.account.html
-import gitbucket.core.api._
 import gitbucket.core.helper
 import gitbucket.core.model.GroupMember
 import gitbucket.core.service._
@@ -14,22 +13,19 @@
 
 import io.github.gitbucket.scalatra.forms._
 import org.apache.commons.io.FileUtils
-import org.eclipse.jgit.api.Git
-import org.eclipse.jgit.dircache.DirCache
-import org.eclipse.jgit.lib.{FileMode, Constants}
 import org.scalatra.i18n.Messages
 
 
 class AccountController extends AccountControllerBase
   with AccountService with RepositoryService with ActivityService with WikiService with LabelsService with SshKeyService
   with OneselfAuthenticator with UsersAuthenticator with GroupManagerAuthenticator with ReadableUsersAuthenticator
-  with AccessTokenService with WebHookService
+  with AccessTokenService with WebHookService with RepositoryCreationService
 
 
 trait AccountControllerBase extends AccountManagementControllerBase {
   self: AccountService with RepositoryService with ActivityService with WikiService with LabelsService with SshKeyService
     with OneselfAuthenticator with UsersAuthenticator with GroupManagerAuthenticator with ReadableUsersAuthenticator
-    with AccessTokenService with WebHookService =>
+    with AccessTokenService with WebHookService with RepositoryCreationService =>
 
   case class AccountNewForm(userName: String, password: String, fullName: String, mailAddress: String,
                             url: Option[String], fileId: Option[String])
@@ -156,25 +152,6 @@
     }
   }
 
-  /**
-   * https://developer.github.com/v3/users/#get-a-single-user
-   */
-  get("/api/v3/users/:userName") {
-    getAccountByUserName(params("userName")).map { account =>
-      JsonFormat(ApiUser(account))
-    } getOrElse NotFound
-  }
-
-  /**
-   * https://developer.github.com/v3/users/#get-the-authenticated-user
-   */
-  get("/api/v3/user") {
-    context.loginAccount.map { account =>
-      JsonFormat(ApiUser(account))
-    } getOrElse Unauthorized
-  }
-
-
   get("/:userName/_edit")(oneselfOnly {
     val userName = params("userName")
     getAccountByUserName(userName).map { x =>
@@ -367,7 +344,7 @@
   post("/new", newRepositoryForm)(usersOnly { form =>
     LockUtil.lock(s"${form.owner}/${form.name}"){
       if(getRepository(form.owner, form.name).isEmpty){
-        createRepository(form.owner, form.name, form.description, form.isPrivate, form.createReadme)
+        createRepository(context.loginAccount.get, form.owner, form.name, form.description, form.isPrivate, form.createReadme)
       }
 
       // redirect to the repository
@@ -375,54 +352,6 @@
     }
   })
 
-  /**
-   * Create user repository
-   * https://developer.github.com/v3/repos/#create
-   */
-  post("/api/v3/user/repos")(usersOnly {
-    val owner = context.loginAccount.get.userName
-    (for {
-      data <- extractFromJsonBody[CreateARepository] if data.isValid
-    } yield {
-      LockUtil.lock(s"${owner}/${data.name}") {
-        if(getRepository(owner, data.name).isEmpty){
-          createRepository(owner, data.name, data.description, data.`private`, data.auto_init)
-          val repository = getRepository(owner, data.name).get
-          JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(owner).get)))
-        } else {
-          ApiError(
-            "A repository with this name already exists on this account", 
-            Some("https://developer.github.com/v3/repos/#create")
-          )
-        }
-      }
-    }) getOrElse NotFound
-  })
-
-  /**
-   * Create group repository
-   * https://developer.github.com/v3/repos/#create
-   */
-  post("/api/v3/orgs/:org/repos")(managersOnly {
-    val groupName = params("org")
-    (for {
-      data <- extractFromJsonBody[CreateARepository] if data.isValid
-    } yield {
-      LockUtil.lock(s"${groupName}/${data.name}") {
-        if(getRepository(groupName, data.name).isEmpty){
-          createRepository(groupName, data.name, data.description, data.`private`, data.auto_init)
-          val repository = getRepository(groupName, data.name).get
-          JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(groupName).get)))
-        } else {
-          ApiError(
-            "A repository with this name already exists for this group", 
-            Some("https://developer.github.com/v3/repos/#create")
-          )
-        }
-      }
-    }) getOrElse NotFound
-  })
-
   get("/:owner/:repository/fork")(readableUsersOnly { repository =>
     val loginAccount   = context.loginAccount.get
     val loginUserName  = loginAccount.userName
@@ -456,7 +385,7 @@
         val originUserName = repository.repository.originUserName.getOrElse(repository.owner)
         val originRepositoryName = repository.repository.originRepositoryName.getOrElse(repository.name)
 
-        createRepository(
+        insertRepository(
           repositoryName       = repository.name,
           userName             = accountName,
           description          = repository.repository.description,
@@ -496,68 +425,6 @@
     }
   })
 
-  private def createRepository(owner: String, name: String, description: Option[String], isPrivate: Boolean, createReadme: Boolean) {
-    val ownerAccount  = getAccountByUserName(owner).get
-    val loginAccount  = context.loginAccount.get
-    val loginUserName = loginAccount.userName
-
-    // Insert to the database at first
-    createRepository(name, owner, description, isPrivate)
-
-    // Add collaborators for group repository
-    if(ownerAccount.isGroupAccount){
-      getGroupMembers(owner).foreach { member =>
-        addCollaborator(owner, name, member.userName)
-      }
-    }
-
-    // Insert default labels
-    insertDefaultLabels(owner, name)
-
-    // Create the actual repository
-    val gitdir = getRepositoryDir(owner, name)
-    JGitUtil.initRepository(gitdir)
-
-    if(createReadme){
-      using(Git.open(gitdir)){ git =>
-        val builder  = DirCache.newInCore.builder()
-        val inserter = git.getRepository.newObjectInserter()
-        val headId   = git.getRepository.resolve(Constants.HEAD + "^{commit}")
-        val content  = if(description.nonEmpty){
-          name + "\n" +
-          "===============\n" +
-          "\n" +
-          description.get
-        } else {
-          name + "\n" +
-          "===============\n"
-        }
-
-        builder.add(JGitUtil.createDirCacheEntry("README.md", FileMode.REGULAR_FILE,
-          inserter.insert(Constants.OBJ_BLOB, content.getBytes("UTF-8"))))
-        builder.finish()
-
-        JGitUtil.createNewCommit(git, inserter, headId, builder.getDirCache.writeTree(inserter),
-          Constants.HEAD, loginAccount.fullName, loginAccount.mailAddress, "Initial commit")
-      }
-    }
-
-    // Create Wiki repository
-    createWikiRepository(loginAccount, owner, name)
-
-    // Record activity
-    recordCreateRepositoryActivity(owner, name, loginUserName)
-  }
-
-  private def insertDefaultLabels(userName: String, repositoryName: String): Unit = {
-    createLabel(userName, repositoryName, "bug", "fc2929")
-    createLabel(userName, repositoryName, "duplicate", "cccccc")
-    createLabel(userName, repositoryName, "enhancement", "84b6eb")
-    createLabel(userName, repositoryName, "invalid", "e6e6e6")
-    createLabel(userName, repositoryName, "question", "cc317c")
-    createLabel(userName, repositoryName, "wontfix", "ffffff")
-  }
-
   private def existsAccount: Constraint = new Constraint(){
     override def validate(name: String, value: String, messages: Messages): Option[String] =
       if(getAccountByUserName(value).isEmpty) Some("User or group does not exist.") else None
diff --git a/src/main/scala/gitbucket/core/controller/ApiController.scala b/src/main/scala/gitbucket/core/controller/ApiController.scala
new file mode 100644
index 0000000..11d764b
--- /dev/null
+++ b/src/main/scala/gitbucket/core/controller/ApiController.scala
@@ -0,0 +1,389 @@
+package gitbucket.core.controller
+
+import gitbucket.core.api._
+import gitbucket.core.model._
+import gitbucket.core.service.IssuesService.IssueSearchCondition
+import gitbucket.core.service.PullRequestService._
+import gitbucket.core.service._
+import gitbucket.core.util.ControlUtil._
+import gitbucket.core.util.Directory._
+import gitbucket.core.util.JGitUtil.CommitInfo
+import gitbucket.core.util._
+import gitbucket.core.util.Implicits._
+import org.eclipse.jgit.api.Git
+import org.scalatra.{NoContent, UnprocessableEntity, Created}
+import scala.collection.JavaConverters._
+
+class ApiController extends ApiControllerBase
+  with RepositoryService
+  with AccountService
+  with ProtectedBranchService
+  with IssuesService
+  with LabelsService
+  with PullRequestService
+  with CommitStatusService
+  with RepositoryCreationService
+  with HandleCommentService
+  with WebHookService
+  with WebHookPullRequestService
+  with WebHookIssueCommentService
+  with WikiService
+  with ActivityService
+  with OwnerAuthenticator
+  with UsersAuthenticator
+  with GroupManagerAuthenticator
+  with ReferrerAuthenticator
+  with ReadableUsersAuthenticator
+  with CollaboratorsAuthenticator
+
+trait ApiControllerBase extends ControllerBase {
+  self: RepositoryService
+    with AccountService
+    with ProtectedBranchService
+    with IssuesService
+    with LabelsService
+    with PullRequestService
+    with CommitStatusService
+    with RepositoryCreationService
+    with HandleCommentService
+    with OwnerAuthenticator
+    with UsersAuthenticator
+    with GroupManagerAuthenticator
+    with ReferrerAuthenticator
+    with ReadableUsersAuthenticator
+    with CollaboratorsAuthenticator =>
+
+  /**
+   * https://developer.github.com/v3/users/#get-a-single-user
+   */
+  get("/api/v3/users/:userName") {
+    getAccountByUserName(params("userName")).map { account =>
+      JsonFormat(ApiUser(account))
+    } getOrElse NotFound
+  }
+
+  /**
+   * https://developer.github.com/v3/users/#get-the-authenticated-user
+   */
+  get("/api/v3/user") {
+    context.loginAccount.map { account =>
+      JsonFormat(ApiUser(account))
+    } getOrElse Unauthorized
+  }
+
+  /**
+   * Create user repository
+   * https://developer.github.com/v3/repos/#create
+   */
+  post("/api/v3/user/repos")(usersOnly {
+    val owner = context.loginAccount.get.userName
+    (for {
+      data <- extractFromJsonBody[CreateARepository] if data.isValid
+    } yield {
+      LockUtil.lock(s"${owner}/${data.name}") {
+        if(getRepository(owner, data.name).isEmpty){
+          createRepository(context.loginAccount.get, owner, data.name, data.description, data.`private`, data.auto_init)
+          val repository = getRepository(owner, data.name).get
+          JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(owner).get)))
+        } else {
+          ApiError(
+            "A repository with this name already exists on this account",
+            Some("https://developer.github.com/v3/repos/#create")
+          )
+        }
+      }
+    }) getOrElse NotFound
+  })
+
+  /**
+   * Create group repository
+   * https://developer.github.com/v3/repos/#create
+   */
+  post("/api/v3/orgs/:org/repos")(managersOnly {
+    val groupName = params("org")
+    (for {
+      data <- extractFromJsonBody[CreateARepository] if data.isValid
+    } yield {
+      LockUtil.lock(s"${groupName}/${data.name}") {
+        if(getRepository(groupName, data.name).isEmpty){
+          createRepository(context.loginAccount.get, groupName, data.name, data.description, data.`private`, data.auto_init)
+          val repository = getRepository(groupName, data.name).get
+          JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(groupName).get)))
+        } else {
+          ApiError(
+            "A repository with this name already exists for this group",
+            Some("https://developer.github.com/v3/repos/#create")
+          )
+        }
+      }
+    }) getOrElse NotFound
+  })
+
+  /** https://developer.github.com/v3/repos/#enabling-and-disabling-branch-protection */
+  patch("/api/v3/repos/:owner/:repo/branches/:branch")(ownerOnly { repository =>
+    import gitbucket.core.api._
+    (for{
+      branch <- params.get("branch") if repository.branchList.find(_ == branch).isDefined
+      protection <- extractFromJsonBody[ApiBranchProtection.EnablingAndDisabling].map(_.protection)
+    } yield {
+      if(protection.enabled){
+        enableBranchProtection(repository.owner, repository.name, branch, protection.status.enforcement_level == ApiBranchProtection.Everyone, protection.status.contexts)
+      } else {
+        disableBranchProtection(repository.owner, repository.name, branch)
+      }
+      JsonFormat(ApiBranch(branch, protection)(RepositoryName(repository)))
+    }) getOrElse NotFound
+  })
+
+  /**
+   * @see https://developer.github.com/v3/rate_limit/#get-your-current-rate-limit-status
+   * but not enabled.
+   */
+  get("/api/v3/rate_limit"){
+    contentType = formats("json")
+    // this message is same as github enterprise...
+    org.scalatra.NotFound(ApiError("Rate limiting is not enabled."))
+  }
+
+  /**
+   * https://developer.github.com/v3/issues/comments/#list-comments-on-an-issue
+   */
+  get("/api/v3/repos/:owner/:repository/issues/:id/comments")(referrersOnly { repository =>
+    (for{
+      issueId <- params("id").toIntOpt
+      comments = getCommentsForApi(repository.owner, repository.name, issueId.toInt)
+    } yield {
+      JsonFormat(comments.map{ case (issueComment, user, issue) => ApiComment(issueComment, RepositoryName(repository), issueId, ApiUser(user), issue.isPullRequest) })
+    }).getOrElse(NotFound)
+  })
+
+  /**
+   * https://developer.github.com/v3/issues/comments/#create-a-comment
+   */
+  post("/api/v3/repos/:owner/:repository/issues/:id/comments")(readableUsersOnly { repository =>
+    (for{
+      issueId      <- params("id").toIntOpt
+      issue        <- getIssue(repository.owner, repository.name, issueId.toString)
+      body         <- extractFromJsonBody[CreateAComment].map(_.body) if ! body.isEmpty
+      action       =  params.get("action").filter(_ => isEditable(issue.userName, issue.repositoryName, issue.openedUserName))
+      (issue, id)  <- handleComment(issue, Some(body), repository, action)
+      issueComment <- getComment(repository.owner, repository.name, id.toString())
+    } yield {
+      JsonFormat(ApiComment(issueComment, RepositoryName(repository), issueId, ApiUser(context.loginAccount.get), issue.isPullRequest))
+    }) getOrElse NotFound
+  })
+
+  /**
+   * List all labels for this repository
+   * https://developer.github.com/v3/issues/labels/#list-all-labels-for-this-repository
+   */
+  get("/api/v3/repos/:owner/:repository/labels")(referrersOnly { repository =>
+    JsonFormat(getLabels(repository.owner, repository.name).map { label =>
+      ApiLabel(label, RepositoryName(repository))
+    })
+  })
+
+  /**
+   * Get a single label
+   * https://developer.github.com/v3/issues/labels/#get-a-single-label
+   */
+  get("/api/v3/repos/:owner/:repository/labels/:labelName")(referrersOnly { repository =>
+    getLabel(repository.owner, repository.name, params("labelName")).map { label =>
+      JsonFormat(ApiLabel(label, RepositoryName(repository)))
+    } getOrElse NotFound()
+  })
+
+  /**
+   * Create a label
+   * https://developer.github.com/v3/issues/labels/#create-a-label
+   */
+  post("/api/v3/repos/:owner/:repository/labels")(collaboratorsOnly { repository =>
+    (for{
+      data <- extractFromJsonBody[CreateALabel] if data.isValid
+    } yield {
+      LockUtil.lock(RepositoryName(repository).fullName) {
+        if (getLabel(repository.owner, repository.name, data.name).isEmpty) {
+          val labelId = createLabel(repository.owner, repository.name, data.name, data.color)
+          getLabel(repository.owner, repository.name, labelId).map { label =>
+            Created(JsonFormat(ApiLabel(label, RepositoryName(repository))))
+          } getOrElse NotFound()
+        } else {
+          // TODO ApiError should support errors field to enhance compatibility of GitHub API
+          UnprocessableEntity(ApiError(
+            "Validation Failed",
+            Some("https://developer.github.com/v3/issues/labels/#create-a-label")
+          ))
+        }
+      }
+    }) getOrElse NotFound()
+  })
+
+  /**
+   * Update a label
+   * https://developer.github.com/v3/issues/labels/#update-a-label
+   */
+  patch("/api/v3/repos/:owner/:repository/labels/:labelName")(collaboratorsOnly { repository =>
+    (for{
+      data <- extractFromJsonBody[CreateALabel] if data.isValid
+    } yield {
+      LockUtil.lock(RepositoryName(repository).fullName) {
+        getLabel(repository.owner, repository.name, params("labelName")).map { label =>
+          if (getLabel(repository.owner, repository.name, data.name).isEmpty) {
+            updateLabel(repository.owner, repository.name, label.labelId, data.name, data.color)
+            JsonFormat(ApiLabel(
+              getLabel(repository.owner, repository.name, label.labelId).get,
+              RepositoryName(repository)))
+          } else {
+            // TODO ApiError should support errors field to enhance compatibility of GitHub API
+            UnprocessableEntity(ApiError(
+              "Validation Failed",
+              Some("https://developer.github.com/v3/issues/labels/#create-a-label")))
+          }
+        } getOrElse NotFound()
+      }
+    }) getOrElse NotFound()
+  })
+
+  /**
+   * Delete a label
+   * https://developer.github.com/v3/issues/labels/#delete-a-label
+   */
+  delete("/api/v3/repos/:owner/:repository/labels/:labelName")(collaboratorsOnly { repository =>
+    LockUtil.lock(RepositoryName(repository).fullName) {
+      getLabel(repository.owner, repository.name, params("labelName")).map { label =>
+        deleteLabel(repository.owner, repository.name, label.labelId)
+        NoContent()
+      } getOrElse NotFound()
+    }
+  })
+
+  /**
+   * https://developer.github.com/v3/pulls/#list-pull-requests
+   */
+  get("/api/v3/repos/:owner/:repository/pulls")(referrersOnly { repository =>
+    val page       = IssueSearchCondition.page(request)
+    // TODO: more api spec condition
+    val condition = IssueSearchCondition(request)
+    val baseOwner = getAccountByUserName(repository.owner).get
+    val issues:List[(Issue, Account, Int, PullRequest, Repository, Account)] = searchPullRequestByApi(condition, (page - 1) * PullRequestLimit, PullRequestLimit, repository.owner -> repository.name)
+    JsonFormat(issues.map{case (issue, issueUser, commentCount, pullRequest, headRepo, headOwner) =>
+      ApiPullRequest(
+        issue,
+        pullRequest,
+        ApiRepository(headRepo, ApiUser(headOwner)),
+        ApiRepository(repository, ApiUser(baseOwner)),
+        ApiUser(issueUser)) })
+  })
+
+  /**
+   * https://developer.github.com/v3/pulls/#get-a-single-pull-request
+   */
+  get("/api/v3/repos/:owner/:repository/pulls/:id")(referrersOnly { repository =>
+    (for{
+      issueId <- params("id").toIntOpt
+      (issue, pullRequest) <- getPullRequest(repository.owner, repository.name, issueId)
+      users = getAccountsByUserNames(Set(repository.owner, pullRequest.requestUserName, issue.openedUserName), Set())
+      baseOwner <- users.get(repository.owner)
+      headOwner <- users.get(pullRequest.requestUserName)
+      issueUser <- users.get(issue.openedUserName)
+      headRepo  <- getRepository(pullRequest.requestUserName, pullRequest.requestRepositoryName)
+    } yield {
+      JsonFormat(ApiPullRequest(
+        issue,
+        pullRequest,
+        ApiRepository(headRepo, ApiUser(headOwner)),
+        ApiRepository(repository, ApiUser(baseOwner)),
+        ApiUser(issueUser)))
+    }).getOrElse(NotFound)
+  })
+
+  /**
+   * https://developer.github.com/v3/pulls/#list-commits-on-a-pull-request
+   */
+  get("/api/v3/repos/:owner/:repository/pulls/:id/commits")(referrersOnly { repository =>
+    val owner = repository.owner
+    val name = repository.name
+    params("id").toIntOpt.flatMap{ issueId =>
+      getPullRequest(owner, name, issueId) map { case(issue, pullreq) =>
+        using(Git.open(getRepositoryDir(owner, name))){ git =>
+          val oldId = git.getRepository.resolve(pullreq.commitIdFrom)
+          val newId = git.getRepository.resolve(pullreq.commitIdTo)
+          val repoFullName = RepositoryName(repository)
+          val commits = git.log.addRange(oldId, newId).call.iterator.asScala.map(c => ApiCommitListItem(new CommitInfo(c), repoFullName)).toList
+          JsonFormat(commits)
+        }
+      }
+    } getOrElse NotFound
+  })
+
+  /**
+   * https://developer.github.com/v3/repos/#get
+   */
+  get("/api/v3/repos/:owner/:repository")(referrersOnly { repository =>
+    JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(repository.owner).get)))
+  })
+
+  /**
+   * https://developer.github.com/v3/repos/statuses/#create-a-status
+   */
+  post("/api/v3/repos/:owner/:repo/statuses/:sha")(collaboratorsOnly { repository =>
+    (for{
+      ref <- params.get("sha")
+      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
+      data <- extractFromJsonBody[CreateAStatus] if data.isValid
+      creator <- context.loginAccount
+      state <- CommitState.valueOf(data.state)
+      statusId = createCommitStatus(repository.owner, repository.name, sha, data.context.getOrElse("default"),
+        state, data.target_url, data.description, new java.util.Date(), creator)
+      status <- getCommitStatus(repository.owner, repository.name, statusId)
+    } yield {
+      JsonFormat(ApiCommitStatus(status, ApiUser(creator)))
+    }) getOrElse NotFound
+  })
+
+  /**
+   * https://developer.github.com/v3/repos/statuses/#list-statuses-for-a-specific-ref
+   *
+   * ref is Ref to list the statuses from. It can be a SHA, a branch name, or a tag name.
+   */
+  val listStatusesRoute = get("/api/v3/repos/:owner/:repo/commits/:ref/statuses")(referrersOnly { repository =>
+    (for{
+      ref <- params.get("ref")
+      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
+    } yield {
+      JsonFormat(getCommitStatuesWithCreator(repository.owner, repository.name, sha).map{ case(status, creator) =>
+        ApiCommitStatus(status, ApiUser(creator))
+      })
+    }) getOrElse NotFound
+  })
+
+  /**
+   * https://developer.github.com/v3/repos/statuses/#list-statuses-for-a-specific-ref
+   *
+   * legacy route
+   */
+  get("/api/v3/repos/:owner/:repo/statuses/:ref"){
+    listStatusesRoute.action()
+  }
+
+  /**
+   * https://developer.github.com/v3/repos/statuses/#get-the-combined-status-for-a-specific-ref
+   *
+   * ref is Ref to list the statuses from. It can be a SHA, a branch name, or a tag name.
+   */
+  get("/api/v3/repos/:owner/:repo/commits/:ref/status")(referrersOnly { repository =>
+    (for{
+      ref <- params.get("ref")
+      owner <- getAccountByUserName(repository.owner)
+      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
+    } yield {
+      val statuses = getCommitStatuesWithCreator(repository.owner, repository.name, sha)
+      JsonFormat(ApiCombinedCommitStatus(sha, statuses, ApiRepository(repository, owner)))
+    }) getOrElse NotFound
+  })
+
+  private def isEditable(owner: String, repository: String, author: String)(implicit context: Context): Boolean =
+    hasWritePermission(owner, repository, context.loginAccount) || author == context.loginAccount.get.userName
+
+}
+
diff --git a/src/main/scala/gitbucket/core/controller/IndexController.scala b/src/main/scala/gitbucket/core/controller/IndexController.scala
index 5c83cbb..8f0ed76 100644
--- a/src/main/scala/gitbucket/core/controller/IndexController.scala
+++ b/src/main/scala/gitbucket/core/controller/IndexController.scala
@@ -121,16 +121,6 @@
     getAccountByUserName(params("userName")).isDefined
   })
 
-  /**
-   * @see https://developer.github.com/v3/rate_limit/#get-your-current-rate-limit-status
-   * but not enabled.
-   */
-  get("/api/v3/rate_limit"){
-    contentType = formats("json")
-    // this message is same as github enterprise...
-    org.scalatra.NotFound(ApiError("Rate limiting is not enabled."))
-  }
-
   // TODO Move to RepositoryViwerController?
   post("/search", searchForm){ form =>
     redirect(s"/${form.owner}/${form.repository}/search?q=${StringUtil.urlEncode(form.query)}")
diff --git a/src/main/scala/gitbucket/core/controller/IssuesController.scala b/src/main/scala/gitbucket/core/controller/IssuesController.scala
index 6ef4964..912c4f9 100644
--- a/src/main/scala/gitbucket/core/controller/IssuesController.scala
+++ b/src/main/scala/gitbucket/core/controller/IssuesController.scala
@@ -1,8 +1,6 @@
 package gitbucket.core.controller
 
-import gitbucket.core.api._
 import gitbucket.core.issues.html
-import gitbucket.core.model.Issue
 import gitbucket.core.service.IssuesService._
 import gitbucket.core.service._
 import gitbucket.core.util.ControlUtil._
@@ -16,11 +14,11 @@
 
 
 class IssuesController extends IssuesControllerBase
-  with IssuesService with RepositoryService with AccountService with LabelsService with MilestonesService with ActivityService
+  with IssuesService with RepositoryService with AccountService with LabelsService with MilestonesService with ActivityService with HandleCommentService
   with ReadableUsersAuthenticator with ReferrerAuthenticator with CollaboratorsAuthenticator with PullRequestService with WebHookIssueCommentService
 
 trait IssuesControllerBase extends ControllerBase {
-  self: IssuesService with RepositoryService with AccountService with LabelsService with MilestonesService with ActivityService
+  self: IssuesService with RepositoryService with AccountService with LabelsService with MilestonesService with ActivityService with HandleCommentService
     with ReadableUsersAuthenticator with ReferrerAuthenticator with CollaboratorsAuthenticator with PullRequestService with WebHookIssueCommentService =>
 
   case class IssueCreateForm(title: String, content: Option[String],
@@ -78,18 +76,6 @@
     }
   })
 
-  /**
-   * https://developer.github.com/v3/issues/comments/#list-comments-on-an-issue
-   */
-  get("/api/v3/repos/:owner/:repository/issues/:id/comments")(referrersOnly { repository =>
-    (for{
-      issueId <- params("id").toIntOpt
-      comments = getCommentsForApi(repository.owner, repository.name, issueId.toInt)
-    } yield {
-      JsonFormat(comments.map{ case (issueComment, user, issue) => ApiComment(issueComment, RepositoryName(repository), issueId, ApiUser(user), issue.isPullRequest) })
-    }).getOrElse(NotFound)
-  })
-
   get("/:owner/:repository/issues/new")(readableUsersOnly { repository =>
     defining(repository.owner, repository.name){ case (owner, name) =>
       html.create(
@@ -128,7 +114,7 @@
 
       getIssue(owner, name, issueId.toString).foreach { issue =>
         // extract references and create refer comment
-        createReferComment(owner, name, issue, form.title + " " + form.content.getOrElse(""))
+        createReferComment(owner, name, issue, form.title + " " + form.content.getOrElse(""), context.loginAccount.get)
 
         // call web hooks
         callIssuesWebHook("opened", repository, issue, context.baseUrl, context.loginAccount.get)
@@ -150,7 +136,7 @@
           // update issue
           updateIssue(owner, name, issue.issueId, title, issue.content)
           // extract references and create refer comment
-          createReferComment(owner, name, issue.copy(title = title), title)
+          createReferComment(owner, name, issue.copy(title = title), title, context.loginAccount.get)
 
           redirect(s"/${owner}/${name}/issues/_data/${issue.issueId}")
         } else Unauthorized
@@ -165,7 +151,7 @@
           // update issue
           updateIssue(owner, name, issue.issueId, issue.title, content)
           // extract references and create refer comment
-          createReferComment(owner, name, issue, content.getOrElse(""))
+          createReferComment(owner, name, issue, content.getOrElse(""), context.loginAccount.get)
 
           redirect(s"/${owner}/${name}/issues/_data/${issue.issueId}")
         } else Unauthorized
@@ -174,30 +160,22 @@
   })
 
   post("/:owner/:repository/issue_comments/new", commentForm)(readableUsersOnly { (form, repository) =>
-    handleComment(form.issueId, Some(form.content), repository)() map { case (issue, id) =>
-      redirect(s"/${repository.owner}/${repository.name}/${
-        if(issue.isPullRequest) "pull" else "issues"}/${form.issueId}#comment-${id}")
+    getIssue(repository.owner, repository.name, form.issueId.toString).flatMap { issue =>
+      val actionOpt = params.get("action").filter(_ => isEditable(issue.userName, issue.repositoryName, issue.openedUserName))
+      handleComment(issue, Some(form.content), repository, actionOpt) map { case (issue, id) =>
+        redirect(s"/${repository.owner}/${repository.name}/${
+          if(issue.isPullRequest) "pull" else "issues"}/${form.issueId}#comment-${id}")
+      }
     } getOrElse NotFound
   })
 
-  /**
-   * https://developer.github.com/v3/issues/comments/#create-a-comment
-   */
-  post("/api/v3/repos/:owner/:repository/issues/:id/comments")(readableUsersOnly { repository =>
-    (for{
-      issueId <- params("id").toIntOpt
-      body <- extractFromJsonBody[CreateAComment].map(_.body) if ! body.isEmpty
-      (issue, id) <- handleComment(issueId, Some(body), repository)()
-      issueComment <- getComment(repository.owner, repository.name, id.toString())
-    } yield {
-      JsonFormat(ApiComment(issueComment, RepositoryName(repository), issueId, ApiUser(context.loginAccount.get), issue.isPullRequest))
-    }) getOrElse NotFound
-  })
-
   post("/:owner/:repository/issue_comments/state", issueStateForm)(readableUsersOnly { (form, repository) =>
-    handleComment(form.issueId, form.content, repository)() map { case (issue, id) =>
-      redirect(s"/${repository.owner}/${repository.name}/${
-        if(issue.isPullRequest) "pull" else "issues"}/${form.issueId}#comment-${id}")
+    getIssue(repository.owner, repository.name, form.issueId.toString).flatMap { issue =>
+      val actionOpt = params.get("action").filter(_ => isEditable(issue.userName, issue.repositoryName, issue.openedUserName))
+      handleComment(issue, form.content, repository, actionOpt) map { case (issue, id) =>
+        redirect(s"/${repository.owner}/${repository.name}/${
+          if(issue.isPullRequest) "pull" else "issues"}/${form.issueId}#comment-${id}")
+      }
     } getOrElse NotFound
   })
 
@@ -315,8 +293,16 @@
   post("/:owner/:repository/issues/batchedit/state")(collaboratorsOnly { repository =>
     defining(params.get("value")){ action =>
       action match {
-        case Some("open")  => executeBatch(repository) { handleComment(_, None, repository)( _ => Some("reopen")) }
-        case Some("close") => executeBatch(repository) { handleComment(_, None, repository)( _ => Some("close"))  }
+        case Some("open")  => executeBatch(repository) { issueId =>
+          getIssue(repository.owner, repository.name, issueId.toString).foreach { issue =>
+            handleComment(issue, None, repository, Some("reopen"))
+          }
+        }
+        case Some("close") => executeBatch(repository) { issueId =>
+          getIssue(repository.owner, repository.name, issueId.toString).foreach { issue =>
+            handleComment(issue, None, repository, Some("close"))
+          }
+        }
         case _ => // TODO BadRequest
       }
     }
@@ -373,99 +359,6 @@
     }
   }
 
-  // TODO Same method exists in PullRequestController. Should it moved to IssueService?
-  private def createReferComment(owner: String, repository: String, fromIssue: Issue, message: String) = {
-    StringUtil.extractIssueId(message).foreach { issueId =>
-      val content = fromIssue.issueId + ":" + fromIssue.title
-      if(getIssue(owner, repository, issueId).isDefined){
-        // Not add if refer comment already exist.
-        if(!getComments(owner, repository, issueId.toInt).exists { x => x.action == "refer" && x.content == content }) {
-          createComment(owner, repository, context.loginAccount.get.userName, issueId.toInt, content, "refer")
-        }
-      }
-    }
-  }
-
-  /**
-   * @see [[https://github.com/takezoe/gitbucket/wiki/CommentAction]]
-   */
-  private def handleComment(issueId: Int, content: Option[String], repository: RepositoryService.RepositoryInfo)
-      (getAction: Issue => Option[String] =
-           p1 => params.get("action").filter(_ => isEditable(p1.userName, p1.repositoryName, p1.openedUserName))) = {
-
-    defining(repository.owner, repository.name){ case (owner, name) =>
-      val userName = context.loginAccount.get.userName
-
-      getIssue(owner, name, issueId.toString) flatMap { issue =>
-        val (action, recordActivity) =
-          getAction(issue)
-            .collect {
-              case "close" if(!issue.closed) => true  ->
-                (Some("close")  -> Some(if(issue.isPullRequest) recordClosePullRequestActivity _ else recordCloseIssueActivity _))
-              case "reopen" if(issue.closed) => false ->
-                (Some("reopen") -> Some(recordReopenIssueActivity _))
-            }
-            .map { case (closed, t) =>
-              updateClosed(owner, name, issueId, closed)
-              t
-            }
-            .getOrElse(None -> None)
-
-        val commentId = (content, action) match {
-          case (None, None) => None
-          case (None, Some(action)) => Some(createComment(owner, name, userName, issueId, action.capitalize, action))
-          case (Some(content), _) => Some(createComment(owner, name, userName, issueId, content, action.map(_+ "_comment").getOrElse("comment")))
-        }
-
-        // record comment activity if comment is entered
-        content foreach {
-          (if(issue.isPullRequest) recordCommentPullRequestActivity _ else recordCommentIssueActivity _)
-          (owner, name, userName, issueId, _)
-        }
-        recordActivity foreach ( _ (owner, name, userName, issueId, issue.title) )
-
-        // extract references and create refer comment
-        content.map { content =>
-          createReferComment(owner, name, issue, content)
-        }
-
-        // call web hooks
-        action match {
-          case None => commentId.map{ commentIdSome => callIssueCommentWebHook(repository, issue, commentIdSome, context.loginAccount.get) }
-          case Some(act) => val webHookAction = act match {
-            case "open"   => "opened"
-            case "reopen" => "reopened"
-            case "close"  => "closed"
-            case _ => act
-          }
-          if(issue.isPullRequest){
-            callPullRequestWebHook(webHookAction, repository, issue.issueId, context.baseUrl, context.loginAccount.get)
-          } else {
-            callIssuesWebHook(webHookAction, repository, issue, context.baseUrl, context.loginAccount.get)
-          }
-        }
-
-        // notifications
-        Notifier() match {
-          case f =>
-            content foreach {
-              f.toNotify(repository, issue, _){
-                Notifier.msgComment(s"${context.baseUrl}/${owner}/${name}/${
-                  if(issue.isPullRequest) "pull" else "issues"}/${issueId}#comment-${commentId.get}")
-              }
-            }
-            action foreach {
-              f.toNotify(repository, issue, _){
-                Notifier.msgStatus(s"${context.baseUrl}/${owner}/${name}/issues/${issueId}")
-              }
-            }
-        }
-
-        commentId.map( issue -> _ )
-      }
-    }
-  }
-
   private def searchIssues(repository: RepositoryService.RepositoryInfo) = {
     defining(repository.owner, repository.name){ case (owner, repoName) =>
       val page       = IssueSearchCondition.page(request)
diff --git a/src/main/scala/gitbucket/core/controller/LabelsController.scala b/src/main/scala/gitbucket/core/controller/LabelsController.scala
index 4074c61..9ebdf6e 100644
--- a/src/main/scala/gitbucket/core/controller/LabelsController.scala
+++ b/src/main/scala/gitbucket/core/controller/LabelsController.scala
@@ -1,13 +1,12 @@
 package gitbucket.core.controller
 
-import gitbucket.core.api.{ApiError, CreateALabel, ApiLabel, JsonFormat}
 import gitbucket.core.issues.labels.html
 import gitbucket.core.service.{RepositoryService, AccountService, IssuesService, LabelsService}
-import gitbucket.core.util.{LockUtil, RepositoryName, ReferrerAuthenticator, CollaboratorsAuthenticator}
+import gitbucket.core.util.{ReferrerAuthenticator, CollaboratorsAuthenticator}
 import gitbucket.core.util.Implicits._
 import io.github.gitbucket.scalatra.forms._
 import org.scalatra.i18n.Messages
-import org.scalatra.{NoContent, UnprocessableEntity, Created, Ok}
+import org.scalatra.Ok
 
 class LabelsController extends LabelsControllerBase
   with LabelsService with IssuesService with RepositoryService with AccountService
@@ -32,26 +31,6 @@
       hasWritePermission(repository.owner, repository.name, context.loginAccount))
   })
 
-  /**
-    * List all labels for this repository
-    * https://developer.github.com/v3/issues/labels/#list-all-labels-for-this-repository
-    */
-  get("/api/v3/repos/:owner/:repository/labels")(referrersOnly { repository =>
-    JsonFormat(getLabels(repository.owner, repository.name).map { label =>
-      ApiLabel(label, RepositoryName(repository))
-    })
-  })
-
-  /**
-    * Get a single label
-    * https://developer.github.com/v3/issues/labels/#get-a-single-label
-    */
-  get("/api/v3/repos/:owner/:repository/labels/:labelName")(referrersOnly { repository =>
-    getLabel(repository.owner, repository.name, params("labelName")).map { label =>
-      JsonFormat(ApiLabel(label, RepositoryName(repository)))
-    } getOrElse NotFound()
-  })
-
   ajaxGet("/:owner/:repository/issues/labels/new")(collaboratorsOnly { repository =>
     html.edit(None, repository)
   })
@@ -66,31 +45,6 @@
       hasWritePermission(repository.owner, repository.name, context.loginAccount))
   })
 
-  /**
-    * Create a label
-    * https://developer.github.com/v3/issues/labels/#create-a-label
-    */
-  post("/api/v3/repos/:owner/:repository/labels")(collaboratorsOnly { repository =>
-    (for{
-      data <- extractFromJsonBody[CreateALabel] if data.isValid
-    } yield {
-      LockUtil.lock(RepositoryName(repository).fullName) {
-        if (getLabel(repository.owner, repository.name, data.name).isEmpty) {
-          val labelId = createLabel(repository.owner, repository.name, data.name, data.color)
-          getLabel(repository.owner, repository.name, labelId).map { label =>
-            Created(JsonFormat(ApiLabel(label, RepositoryName(repository))))
-          } getOrElse NotFound()
-        } else {
-          // TODO ApiError should support errors field to enhance compatibility of GitHub API
-          UnprocessableEntity(ApiError(
-            "Validation Failed",
-            Some("https://developer.github.com/v3/issues/labels/#create-a-label")
-          ))
-        }
-      }
-    }) getOrElse NotFound()
-  })
-
   ajaxGet("/:owner/:repository/issues/labels/:labelId/edit")(collaboratorsOnly { repository =>
     getLabel(repository.owner, repository.name, params("labelId").toInt).map { label =>
       html.edit(Some(label), repository)
@@ -107,51 +61,12 @@
       hasWritePermission(repository.owner, repository.name, context.loginAccount))
   })
 
-  /**
-    * Update a label
-    * https://developer.github.com/v3/issues/labels/#update-a-label
-    */
-  patch("/api/v3/repos/:owner/:repository/labels/:labelName")(collaboratorsOnly { repository =>
-    (for{
-      data <- extractFromJsonBody[CreateALabel] if data.isValid
-    } yield {
-      LockUtil.lock(RepositoryName(repository).fullName) {
-        getLabel(repository.owner, repository.name, params("labelName")).map { label =>
-          if (getLabel(repository.owner, repository.name, data.name).isEmpty) {
-            updateLabel(repository.owner, repository.name, label.labelId, data.name, data.color)
-            JsonFormat(ApiLabel(
-              getLabel(repository.owner, repository.name, label.labelId).get,
-              RepositoryName(repository)))
-          } else {
-            // TODO ApiError should support errors field to enhance compatibility of GitHub API
-            UnprocessableEntity(ApiError(
-              "Validation Failed",
-              Some("https://developer.github.com/v3/issues/labels/#create-a-label")))
-          }
-        } getOrElse NotFound()
-      }
-    }) getOrElse NotFound()
-  })
-
   ajaxPost("/:owner/:repository/issues/labels/:labelId/delete")(collaboratorsOnly { repository =>
     deleteLabel(repository.owner, repository.name, params("labelId").toInt)
     Ok()
   })
 
   /**
-    * Delete a label
-    * https://developer.github.com/v3/issues/labels/#delete-a-label
-    */
-  delete("/api/v3/repos/:owner/:repository/labels/:labelName")(collaboratorsOnly { repository =>
-    LockUtil.lock(RepositoryName(repository).fullName) {
-      getLabel(repository.owner, repository.name, params("labelName")).map { label =>
-        deleteLabel(repository.owner, repository.name, label.labelId)
-        NoContent()
-      } getOrElse NotFound()
-    }
-  })
-
-  /**
    * Constraint for the identifier such as user name, repository name or page name.
    */
   private def labelName: Constraint = new Constraint(){
diff --git a/src/main/scala/gitbucket/core/controller/PullRequestsController.scala b/src/main/scala/gitbucket/core/controller/PullRequestsController.scala
index 11141ff..763fcdb 100644
--- a/src/main/scala/gitbucket/core/controller/PullRequestsController.scala
+++ b/src/main/scala/gitbucket/core/controller/PullRequestsController.scala
@@ -1,7 +1,6 @@
 package gitbucket.core.controller
 
-import gitbucket.core.api._
-import gitbucket.core.model.{Account, CommitStatus, CommitState, Repository, PullRequest, Issue, WebHook}
+import gitbucket.core.model.WebHook
 import gitbucket.core.pulls.html
 import gitbucket.core.service.CommitStatusService
 import gitbucket.core.service.MergeService
@@ -82,24 +81,6 @@
     }
   })
 
-  /**
-   * https://developer.github.com/v3/pulls/#list-pull-requests
-   */
-  get("/api/v3/repos/:owner/:repository/pulls")(referrersOnly { repository =>
-    val page       = IssueSearchCondition.page(request)
-    // TODO: more api spec condition
-    val condition = IssueSearchCondition(request)
-    val baseOwner = getAccountByUserName(repository.owner).get
-    val issues:List[(Issue, Account, Int, PullRequest, Repository, Account)] = searchPullRequestByApi(condition, (page - 1) * PullRequestLimit, PullRequestLimit, repository.owner -> repository.name)
-    JsonFormat(issues.map{case (issue, issueUser, commentCount, pullRequest, headRepo, headOwner) =>
-      ApiPullRequest(
-        issue,
-        pullRequest,
-        ApiRepository(headRepo, ApiUser(headOwner)),
-        ApiRepository(repository, ApiUser(baseOwner)),
-        ApiUser(issueUser)) })
-  })
-
   get("/:owner/:repository/pull/:id")(referrersOnly { repository =>
     params("id").toIntOpt.flatMap{ issueId =>
       val owner = repository.owner
@@ -126,47 +107,6 @@
     } getOrElse NotFound
   })
 
-  /**
-   * https://developer.github.com/v3/pulls/#get-a-single-pull-request
-   */
-  get("/api/v3/repos/:owner/:repository/pulls/:id")(referrersOnly { repository =>
-    (for{
-      issueId <- params("id").toIntOpt
-      (issue, pullRequest) <- getPullRequest(repository.owner, repository.name, issueId)
-      users = getAccountsByUserNames(Set(repository.owner, pullRequest.requestUserName, issue.openedUserName), Set())
-      baseOwner <- users.get(repository.owner)
-      headOwner <- users.get(pullRequest.requestUserName)
-      issueUser <- users.get(issue.openedUserName)
-      headRepo  <- getRepository(pullRequest.requestUserName, pullRequest.requestRepositoryName)
-    } yield {
-      JsonFormat(ApiPullRequest(
-        issue,
-        pullRequest,
-        ApiRepository(headRepo, ApiUser(headOwner)),
-        ApiRepository(repository, ApiUser(baseOwner)),
-        ApiUser(issueUser)))
-    }).getOrElse(NotFound)
-  })
-
-  /**
-   * https://developer.github.com/v3/pulls/#list-commits-on-a-pull-request
-   */
-  get("/api/v3/repos/:owner/:repository/pulls/:id/commits")(referrersOnly { repository =>
-    val owner = repository.owner
-    val name = repository.name
-    params("id").toIntOpt.flatMap{ issueId =>
-      getPullRequest(owner, name, issueId) map { case(issue, pullreq) =>
-        using(Git.open(getRepositoryDir(owner, name))){ git =>
-          val oldId = git.getRepository.resolve(pullreq.commitIdFrom)
-          val newId = git.getRepository.resolve(pullreq.commitIdTo)
-          val repoFullName = RepositoryName(repository)
-          val commits = git.log.addRange(oldId, newId).call.iterator.asScala.map(c => ApiCommitListItem(new CommitInfo(c), repoFullName)).toList
-          JsonFormat(commits)
-        }
-      }
-    } getOrElse NotFound
-  })
-
   ajaxGet("/:owner/:repository/pull/:id/mergeguide")(referrersOnly { repository =>
     params("id").toIntOpt.flatMap{ issueId =>
       val owner = repository.owner
@@ -523,7 +463,7 @@
 
       getIssue(owner, name, issueId.toString) foreach { issue =>
         // extract references and create refer comment
-        createReferComment(owner, name, issue, form.title + " " + form.content.getOrElse(""))
+        createReferComment(owner, name, issue, form.title + " " + form.content.getOrElse(""), context.loginAccount.get)
 
         // notifications
         Notifier().toNotify(repository, issue, form.content.getOrElse("")){
@@ -535,19 +475,6 @@
     }
   })
 
-  // TODO Same method exists in IssueController. Should it moved to IssueService?
-  private def createReferComment(owner: String, repository: String, fromIssue: Issue, message: String) = {
-    StringUtil.extractIssueId(message).foreach { issueId =>
-      val content = fromIssue.issueId + ":" + fromIssue.title
-      if(getIssue(owner, repository, issueId).isDefined){
-        // Not add if refer comment already exist.
-        if(!getComments(owner, repository, issueId.toInt).exists { x => x.action == "refer" && x.content == content }) {
-          createComment(owner, repository, context.loginAccount.get.userName, issueId.toInt, content, "refer")
-        }
-      }
-    }
-  }
-
   /**
    * Parses branch identifier and extracts owner and branch name as tuple.
    *
@@ -611,14 +538,4 @@
         hasWritePermission(owner, repoName, context.loginAccount))
     }
 
-  // TODO: same as gitbucket.core.servlet.CommitLogHook ...
-  private def createIssueComment(owner: String, repository: String, commit: CommitInfo) = {
-    StringUtil.extractIssueId(commit.fullMessage).foreach { issueId =>
-      if(getIssue(owner, repository, issueId).isDefined){
-        getAccountByMailAddress(commit.committerEmailAddress).foreach { account =>
-          createComment(owner, repository, account.userName, issueId.toInt, commit.fullMessage + " " + commit.id, "commit")
-        }
-      }
-    }
-  }
 }
diff --git a/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala b/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala
index 7867334..d15c424 100644
--- a/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala
+++ b/src/main/scala/gitbucket/core/controller/RepositorySettingsController.scala
@@ -142,22 +142,6 @@
     }
   })
 
-  /** https://developer.github.com/v3/repos/#enabling-and-disabling-branch-protection */
-  patch("/api/v3/repos/:owner/:repo/branches/:branch")(ownerOnly { repository =>
-    import gitbucket.core.api._
-    (for{
-      branch <- params.get("branch") if repository.branchList.find(_ == branch).isDefined
-      protection <- extractFromJsonBody[ApiBranchProtection.EnablingAndDisabling].map(_.protection)
-    } yield {
-      if(protection.enabled){
-        enableBranchProtection(repository.owner, repository.name, branch, protection.status.enforcement_level == ApiBranchProtection.Everyone, protection.status.contexts)
-      } else {
-        disableBranchProtection(repository.owner, repository.name, branch)
-      }
-      JsonFormat(ApiBranch(branch, protection)(RepositoryName(repository)))
-    }) getOrElse NotFound
-  })
-
   /**
    * Display the Collaborators page.
    */
diff --git a/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala b/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
index 1007cf9..e5680d3 100644
--- a/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
+++ b/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
@@ -2,7 +2,6 @@
 
 import javax.servlet.http.{HttpServletResponse, HttpServletRequest}
 
-import gitbucket.core.api._
 import gitbucket.core.plugin.PluginRegistry
 import gitbucket.core.repo.html
 import gitbucket.core.helper
@@ -13,7 +12,7 @@
 import gitbucket.core.util.ControlUtil._
 import gitbucket.core.util.Implicits._
 import gitbucket.core.util.Directory._
-import gitbucket.core.model.{Account, CommitState, WebHook}
+import gitbucket.core.model.{Account, WebHook}
 import gitbucket.core.service.WebHookService._
 import gitbucket.core.view
 import gitbucket.core.view.helpers
@@ -123,13 +122,6 @@
   })
 
   /**
-   * https://developer.github.com/v3/repos/#get
-   */
-  get("/api/v3/repos/:owner/:repository")(referrersOnly { repository =>
-    JsonFormat(ApiRepository(repository, ApiUser(getAccountByUserName(repository.owner).get)))
-  })
-
-  /**
    * Displays the file list of the specified path and branch.
    */
   get("/:owner/:repository/tree/*")(referrersOnly { repository =>
@@ -160,65 +152,6 @@
     }
   })
 
-  /**
-   * https://developer.github.com/v3/repos/statuses/#create-a-status
-   */
-  post("/api/v3/repos/:owner/:repo/statuses/:sha")(collaboratorsOnly { repository =>
-    (for{
-      ref <- params.get("sha")
-      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
-      data <- extractFromJsonBody[CreateAStatus] if data.isValid
-      creator <- context.loginAccount
-      state <- CommitState.valueOf(data.state)
-      statusId = createCommitStatus(repository.owner, repository.name, sha, data.context.getOrElse("default"),
-                                    state, data.target_url, data.description, new java.util.Date(), creator)
-      status <- getCommitStatus(repository.owner, repository.name, statusId)
-    } yield {
-      JsonFormat(ApiCommitStatus(status, ApiUser(creator)))
-    }) getOrElse NotFound
-  })
-
-  /**
-   * https://developer.github.com/v3/repos/statuses/#list-statuses-for-a-specific-ref
-   *
-   * ref is Ref to list the statuses from. It can be a SHA, a branch name, or a tag name.
-   */
-  val listStatusesRoute = get("/api/v3/repos/:owner/:repo/commits/:ref/statuses")(referrersOnly { repository =>
-    (for{
-      ref <- params.get("ref")
-      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
-    } yield {
-      JsonFormat(getCommitStatuesWithCreator(repository.owner, repository.name, sha).map{ case(status, creator) =>
-        ApiCommitStatus(status, ApiUser(creator))
-      })
-    }) getOrElse NotFound
-  })
-
-  /**
-   * https://developer.github.com/v3/repos/statuses/#list-statuses-for-a-specific-ref
-   *
-   * legacy route
-   */
-  get("/api/v3/repos/:owner/:repo/statuses/:ref"){
-    listStatusesRoute.action()
-  }
-
-  /**
-   * https://developer.github.com/v3/repos/statuses/#get-the-combined-status-for-a-specific-ref
-   *
-   * ref is Ref to list the statuses from. It can be a SHA, a branch name, or a tag name.
-   */
-  get("/api/v3/repos/:owner/:repo/commits/:ref/status")(referrersOnly { repository =>
-    (for{
-      ref <- params.get("ref")
-      owner <- getAccountByUserName(repository.owner)
-      sha <- JGitUtil.getShaByRef(repository.owner, repository.name, ref)
-    } yield {
-      val statuses = getCommitStatuesWithCreator(repository.owner, repository.name, sha)
-      JsonFormat(ApiCombinedCommitStatus(sha, statuses, ApiRepository(repository, owner)))
-    }) getOrElse NotFound
-  })
-
   get("/:owner/:repository/new/*")(collaboratorsOnly { repository =>
     val (branch, path) = splitPath(repository, multiParams("splat").head)
     val protectedBranch = getProtectedBranchInfo(repository.owner, repository.name, branch).needStatusCheck(context.loginAccount.get.userName)
diff --git a/src/main/scala/gitbucket/core/service/HandleCommentService.scala b/src/main/scala/gitbucket/core/service/HandleCommentService.scala
new file mode 100644
index 0000000..6a1b068
--- /dev/null
+++ b/src/main/scala/gitbucket/core/service/HandleCommentService.scala
@@ -0,0 +1,91 @@
+package gitbucket.core.service
+
+import gitbucket.core.controller.Context
+import gitbucket.core.model.Issue
+import gitbucket.core.model.Profile._
+import gitbucket.core.util.ControlUtil._
+import gitbucket.core.util.Implicits._
+import gitbucket.core.util.Notifier
+import profile.simple._
+
+trait HandleCommentService {
+  self: RepositoryService with IssuesService with ActivityService
+    with WebHookService with WebHookIssueCommentService with WebHookPullRequestService =>
+
+  /**
+   * @see [[https://github.com/takezoe/gitbucket/wiki/CommentAction]]
+   */
+  def handleComment(issue: Issue, content: Option[String], repository: RepositoryService.RepositoryInfo, actionOpt: Option[String])
+                   (implicit context: Context, s: Session) = {
+
+    defining(repository.owner, repository.name){ case (owner, name) =>
+      val userName = context.loginAccount.get.userName
+
+      val (action, recordActivity) = actionOpt
+        .collect {
+          case "close" if(!issue.closed) => true  ->
+            (Some("close")  -> Some(if(issue.isPullRequest) recordClosePullRequestActivity _ else recordCloseIssueActivity _))
+          case "reopen" if(issue.closed) => false ->
+            (Some("reopen") -> Some(recordReopenIssueActivity _))
+        }
+        .map { case (closed, t) =>
+          updateClosed(owner, name, issue.issueId, closed)
+          t
+        }
+        .getOrElse(None -> None)
+
+      val commentId = (content, action) match {
+        case (None, None) => None
+        case (None, Some(action)) => Some(createComment(owner, name, userName, issue.issueId, action.capitalize, action))
+        case (Some(content), _) => Some(createComment(owner, name, userName, issue.issueId, content, action.map(_+ "_comment").getOrElse("comment")))
+      }
+
+      // record comment activity if comment is entered
+      content foreach {
+        (if(issue.isPullRequest) recordCommentPullRequestActivity _ else recordCommentIssueActivity _)
+        (owner, name, userName, issue.issueId, _)
+      }
+      recordActivity foreach ( _ (owner, name, userName, issue.issueId, issue.title) )
+
+      // extract references and create refer comment
+      content.map { content =>
+        createReferComment(owner, name, issue, content, context.loginAccount.get)
+      }
+
+      // call web hooks
+      action match {
+        case None => commentId.map{ commentIdSome => callIssueCommentWebHook(repository, issue, commentIdSome, context.loginAccount.get) }
+        case Some(act) => val webHookAction = act match {
+          case "open"   => "opened"
+          case "reopen" => "reopened"
+          case "close"  => "closed"
+          case _ => act
+        }
+          if(issue.isPullRequest){
+            callPullRequestWebHook(webHookAction, repository, issue.issueId, context.baseUrl, context.loginAccount.get)
+          } else {
+            callIssuesWebHook(webHookAction, repository, issue, context.baseUrl, context.loginAccount.get)
+          }
+      }
+
+      // notifications
+      Notifier() match {
+        case f =>
+          content foreach {
+            f.toNotify(repository, issue, _){
+              Notifier.msgComment(s"${context.baseUrl}/${owner}/${name}/${
+                if(issue.isPullRequest) "pull" else "issues"}/${issue.issueId}#comment-${commentId.get}")
+            }
+          }
+          action foreach {
+            f.toNotify(repository, issue, _){
+              Notifier.msgStatus(s"${context.baseUrl}/${owner}/${name}/issues/${issue.issueId}")
+            }
+          }
+      }
+
+      commentId.map( issue -> _ )
+    }
+  }
+
+}
diff --git a/src/main/scala/gitbucket/core/service/IssuesService.scala b/src/main/scala/gitbucket/core/service/IssuesService.scala
index 82c8c58..86430a9 100644
--- a/src/main/scala/gitbucket/core/service/IssuesService.scala
+++ b/src/main/scala/gitbucket/core/service/IssuesService.scala
@@ -1,6 +1,8 @@
 package gitbucket.core.service
 
 import gitbucket.core.model.Profile._
+import gitbucket.core.util.JGitUtil.CommitInfo
+import gitbucket.core.util.StringUtil
 import profile.simple._
 
 import gitbucket.core.util.StringUtil._
@@ -12,6 +14,7 @@
 
 
 trait IssuesService {
+  self: AccountService =>
   import IssuesService._
 
   def getIssue(owner: String, repository: String, issueId: String)(implicit s: Session) =
@@ -394,6 +397,29 @@
       }
     }
   }
+
+  def createReferComment(owner: String, repository: String, fromIssue: Issue, message: String, loginAccount: Account)(implicit s: Session) = {
+    StringUtil.extractIssueId(message).foreach { issueId =>
+      val content = fromIssue.issueId + ":" + fromIssue.title
+      if(getIssue(owner, repository, issueId).isDefined){
+        // Not add if refer comment already exist.
+        if(!getComments(owner, repository, issueId.toInt).exists { x => x.action == "refer" && x.content == content }) {
+          createComment(owner, repository, loginAccount.userName, issueId.toInt, content, "refer")
+        }
+      }
+    }
+  }
+
+  def createIssueComment(owner: String, repository: String, commit: CommitInfo)(implicit s: Session) = {
+    StringUtil.extractIssueId(commit.fullMessage).foreach { issueId =>
+      if(getIssue(owner, repository, issueId).isDefined){
+        getAccountByMailAddress(commit.committerEmailAddress).foreach { account =>
+          createComment(owner, repository, account.userName, issueId.toInt, commit.fullMessage + " " + commit.id, "commit")
+        }
+      }
+    }
+  }
+
 }
 
 object IssuesService {
diff --git a/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala b/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala
new file mode 100644
index 0000000..90e0afd
--- /dev/null
+++ b/src/main/scala/gitbucket/core/service/RepositoryCreationService.scala
@@ -0,0 +1,79 @@
+package gitbucket.core.service
+
+import gitbucket.core.model.Profile._
+import gitbucket.core.util.ControlUtil._
+import gitbucket.core.util.Directory._
+import gitbucket.core.util.JGitUtil
+import gitbucket.core.model.Account
+import org.eclipse.jgit.api.Git
+import org.eclipse.jgit.dircache.DirCache
+import org.eclipse.jgit.lib.{FileMode, Constants}
+import profile.simple._
+
+trait RepositoryCreationService {
+  self: AccountService with RepositoryService with LabelsService with WikiService with ActivityService =>
+
+  def createRepository(loginAccount: Account, owner: String, name: String, description: Option[String], isPrivate: Boolean, createReadme: Boolean)
+                      (implicit s: Session) {
+    val ownerAccount  = getAccountByUserName(owner).get
+    val loginUserName = loginAccount.userName
+
+    // Insert to the database at first
+    insertRepository(name, owner, description, isPrivate)
+
+    // Add collaborators for group repository
+    if(ownerAccount.isGroupAccount){
+      getGroupMembers(owner).foreach { member =>
+        addCollaborator(owner, name, member.userName)
+      }
+    }
+
+    // Insert default labels
+    insertDefaultLabels(owner, name)
+
+    // Create the actual repository
+    val gitdir = getRepositoryDir(owner, name)
+    JGitUtil.initRepository(gitdir)
+
+    if(createReadme){
+      using(Git.open(gitdir)){ git =>
+        val builder  = DirCache.newInCore.builder()
+        val inserter = git.getRepository.newObjectInserter()
+        val headId   = git.getRepository.resolve(Constants.HEAD + "^{commit}")
+        val content  = if(description.nonEmpty){
+          name + "\n" +
+            "===============\n" +
+            "\n" +
+            description.get
+        } else {
+          name + "\n" +
+            "===============\n"
+        }
+
+        builder.add(JGitUtil.createDirCacheEntry("README.md", FileMode.REGULAR_FILE,
+          inserter.insert(Constants.OBJ_BLOB, content.getBytes("UTF-8"))))
+        builder.finish()
+
+        JGitUtil.createNewCommit(git, inserter, headId, builder.getDirCache.writeTree(inserter),
+          Constants.HEAD, loginAccount.fullName, loginAccount.mailAddress, "Initial commit")
+      }
+    }
+
+    // Create Wiki repository
+    createWikiRepository(loginAccount, owner, name)
+
+    // Record activity
+    recordCreateRepositoryActivity(owner, name, loginUserName)
+  }
+
+  def insertDefaultLabels(userName: String, repositoryName: String)(implicit s: Session): Unit = {
+    createLabel(userName, repositoryName, "bug", "fc2929")
+    createLabel(userName, repositoryName, "duplicate", "cccccc")
+    createLabel(userName, repositoryName, "enhancement", "84b6eb")
+    createLabel(userName, repositoryName, "invalid", "e6e6e6")
+    createLabel(userName, repositoryName, "question", "cc317c")
+    createLabel(userName, repositoryName, "wontfix", "ffffff")
+  }
+
+
+}
diff --git a/src/main/scala/gitbucket/core/service/RepositoryService.scala b/src/main/scala/gitbucket/core/service/RepositoryService.scala
index 408c9b6..efc2e78 100644
--- a/src/main/scala/gitbucket/core/service/RepositoryService.scala
+++ b/src/main/scala/gitbucket/core/service/RepositoryService.scala
@@ -19,7 +19,7 @@
    * @param originRepositoryName specify for the forked repository. (default is None)
    * @param originUserName specify for the forked repository. (default is None)
    */
-  def createRepository(repositoryName: String, userName: String, description: Option[String], isPrivate: Boolean,
+  def insertRepository(repositoryName: String, userName: String, description: Option[String], isPrivate: Boolean,
                        originRepositoryName: Option[String] = None, originUserName: Option[String] = None,
                        parentRepositoryName: Option[String] = None, parentUserName: Option[String] = None)
                       (implicit s: Session): Unit = {
diff --git a/src/main/scala/gitbucket/core/servlet/GitRepositoryServlet.scala b/src/main/scala/gitbucket/core/servlet/GitRepositoryServlet.scala
index 0583f61..047e5ed 100644
--- a/src/main/scala/gitbucket/core/servlet/GitRepositoryServlet.scala
+++ b/src/main/scala/gitbucket/core/servlet/GitRepositoryServlet.scala
@@ -10,7 +10,6 @@
 import gitbucket.core.service._
 import gitbucket.core.util.ControlUtil._
 import gitbucket.core.util.Implicits._
-import gitbucket.core.util.JGitUtil.CommitInfo
 import gitbucket.core.util._
 
 import org.eclipse.jgit.api.Git
@@ -168,7 +167,7 @@
             if (!existIds.contains(commit.id) && !pushedIds.contains(commit.id)) {
               if (issueCount > 0) {
                 pushedIds.add(commit.id)
-                createIssueComment(commit)
+                createIssueComment(owner, repository, commit)
                 // close issues
                 if(refName(1) == "heads" && branchName == defaultBranch && command.getType == ReceiveCommand.Type.UPDATE){
                   closeIssuesFromMessage(commit.fullMessage, pusher, owner, repository)
@@ -230,13 +229,4 @@
     }
   }
 
-  private def createIssueComment(commit: CommitInfo) = {
-    StringUtil.extractIssueId(commit.fullMessage).foreach { issueId =>
-      if(getIssue(owner, repository, issueId).isDefined){
-        getAccountByMailAddress(commit.committerEmailAddress).foreach { account =>
-          createComment(owner, repository, account.userName, issueId.toInt, commit.fullMessage + " " + commit.id, "commit")
-        }
-      }
-    }
-  }
 }
diff --git a/src/test/scala/gitbucket/core/service/CommitStatusServiceSpec.scala b/src/test/scala/gitbucket/core/service/CommitStatusServiceSpec.scala
index 64eeb19..8c3d36b 100644
--- a/src/test/scala/gitbucket/core/service/CommitStatusServiceSpec.scala
+++ b/src/test/scala/gitbucket/core/service/CommitStatusServiceSpec.scala
@@ -33,7 +33,7 @@
         now         = fixture1.registeredDate)
   test("createCommitState can insert and update") { withTestDB { implicit session =>
     val tester = generateNewAccount(fixture1.creator)
-    createRepository(fixture1.repositoryName,fixture1.userName,None,false)
+    insertRepository(fixture1.repositoryName,fixture1.userName,None,false)
     val id = generateFixture1(tester:Account)
     assert(getCommitStatus(fixture1.userName, fixture1.repositoryName, id) == Some(fixture1.copy(commitStatusId=id)))
     // other one can update
@@ -60,14 +60,14 @@
 
   test("getCommitStatus can find by commitId and context") { withTestDB { implicit session =>
     val tester = generateNewAccount(fixture1.creator)
-    createRepository(fixture1.repositoryName,fixture1.userName,None,false)
+    insertRepository(fixture1.repositoryName,fixture1.userName,None,false)
     val id = generateFixture1(tester:Account)
     assert(getCommitStatus(fixture1.userName, fixture1.repositoryName, fixture1.commitId, fixture1.context) == Some(fixture1.copy(commitStatusId=id)))
   }}
 
   test("getCommitStatus can find by commitStatusId") { withTestDB { implicit session =>
     val tester = generateNewAccount(fixture1.creator)
-    createRepository(fixture1.repositoryName,fixture1.userName,None,false)
+    insertRepository(fixture1.repositoryName,fixture1.userName,None,false)
     val id = generateFixture1(tester:Account)
     assert(getCommitStatus(fixture1.userName, fixture1.repositoryName, id) == Some(fixture1.copy(commitStatusId=id)))
   }}
diff --git a/src/test/scala/gitbucket/core/service/PullRequestServiceSpec.scala b/src/test/scala/gitbucket/core/service/PullRequestServiceSpec.scala
index 2127dbf..ca55903 100644
--- a/src/test/scala/gitbucket/core/service/PullRequestServiceSpec.scala
+++ b/src/test/scala/gitbucket/core/service/PullRequestServiceSpec.scala
@@ -3,7 +3,7 @@
 import gitbucket.core.model._
 import org.scalatest.FunSpec
 
-class PullRequestServiceSpec extends FunSpec with ServiceSpecBase with PullRequestService with IssuesService {
+class PullRequestServiceSpec extends FunSpec with ServiceSpecBase with PullRequestService with IssuesService with AccountService {
 
   def swap(r: (Issue, PullRequest)) = (r._2 -> r._1)
 
diff --git a/src/test/scala/gitbucket/core/service/RepositoryServiceSpec.scala b/src/test/scala/gitbucket/core/service/RepositoryServiceSpec.scala
index 9a343bd..0b13b4b 100644
--- a/src/test/scala/gitbucket/core/service/RepositoryServiceSpec.scala
+++ b/src/test/scala/gitbucket/core/service/RepositoryServiceSpec.scala
@@ -6,7 +6,7 @@
 class RepositoryServiceSpec extends FunSuite with ServiceSpecBase with RepositoryService with AccountService{
   test("renameRepository can rename CommitState, ProtectedBranches") { withTestDB { implicit session =>
     val tester = generateNewAccount("tester")
-    createRepository("repo", "root", None, false)
+    insertRepository("repo", "root", None, false)
     val service = new CommitStatusService with ProtectedBranchService {}
     val id = service.createCommitStatus(
       userName    = "root",
diff --git a/src/test/scala/gitbucket/core/service/ServiceSpecBase.scala b/src/test/scala/gitbucket/core/service/ServiceSpecBase.scala
index a7b383d..06aaaf7 100644
--- a/src/test/scala/gitbucket/core/service/ServiceSpecBase.scala
+++ b/src/test/scala/gitbucket/core/service/ServiceSpecBase.scala
@@ -42,7 +42,7 @@
 
   def generateNewUserWithDBRepository(userName:String, repositoryName:String)(implicit s:Session):Account = {
     val ac = AccountService.getAccountByUserName(userName).getOrElse(generateNewAccount(userName))
-    dummyService.createRepository(repositoryName, userName, None, false)
+    dummyService.insertRepository(repositoryName, userName, None, false)
     ac
   }