diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -612,6 +612,7 @@
     'DivinerWorkflow' => 'applications/diviner/workflow/DivinerWorkflow.php',
     'DoorkeeperBridge' => 'applications/doorkeeper/bridge/DoorkeeperBridge.php',
     'DoorkeeperBridgeAsana' => 'applications/doorkeeper/bridge/DoorkeeperBridgeAsana.php',
+    'DoorkeeperBridgeGitHub' => 'applications/doorkeeper/bridge/DoorkeeperBridgeGitHub.php',
     'DoorkeeperBridgeJIRA' => 'applications/doorkeeper/bridge/DoorkeeperBridgeJIRA.php',
     'DoorkeeperDAO' => 'applications/doorkeeper/storage/DoorkeeperDAO.php',
     'DoorkeeperExternalObject' => 'applications/doorkeeper/storage/DoorkeeperExternalObject.php',
@@ -620,6 +621,7 @@
     'DoorkeeperFeedWorker' => 'applications/doorkeeper/worker/DoorkeeperFeedWorker.php',
     'DoorkeeperFeedWorkerAsana' => 'applications/doorkeeper/worker/DoorkeeperFeedWorkerAsana.php',
     'DoorkeeperFeedWorkerJIRA' => 'applications/doorkeeper/worker/DoorkeeperFeedWorkerJIRA.php',
+    'DoorkeeperGitHubHookController' => 'applications/doorkeeper/controller/DoorkeeperGitHubHookController.php',
     'DoorkeeperImportEngine' => 'applications/doorkeeper/engine/DoorkeeperImportEngine.php',
     'DoorkeeperMissingLinkException' => 'applications/doorkeeper/exception/DoorkeeperMissingLinkException.php',
     'DoorkeeperObjectRef' => 'applications/doorkeeper/engine/DoorkeeperObjectRef.php',
@@ -3203,6 +3205,7 @@
     'DivinerWorkflow' => 'PhabricatorManagementWorkflow',
     'DoorkeeperBridge' => 'Phobject',
     'DoorkeeperBridgeAsana' => 'DoorkeeperBridge',
+    'DoorkeeperBridgeGitHub' => 'DoorkeeperBridge',
     'DoorkeeperBridgeJIRA' => 'DoorkeeperBridge',
     'DoorkeeperDAO' => 'PhabricatorLiskDAO',
     'DoorkeeperExternalObject' =>
@@ -3214,6 +3217,7 @@
     'DoorkeeperFeedWorker' => 'FeedPushWorker',
     'DoorkeeperFeedWorkerAsana' => 'DoorkeeperFeedWorker',
     'DoorkeeperFeedWorkerJIRA' => 'DoorkeeperFeedWorker',
+    'DoorkeeperGitHubHookController' => 'PhabricatorController',
     'DoorkeeperImportEngine' => 'Phobject',
     'DoorkeeperMissingLinkException' => 'Exception',
     'DoorkeeperObjectRef' => 'Phobject',
diff --git a/src/applications/doorkeeper/application/PhabricatorApplicationDoorkeeper.php b/src/applications/doorkeeper/application/PhabricatorApplicationDoorkeeper.php
--- a/src/applications/doorkeeper/application/PhabricatorApplicationDoorkeeper.php
+++ b/src/applications/doorkeeper/application/PhabricatorApplicationDoorkeeper.php
@@ -25,6 +25,7 @@
     return array(
       '/doorkeeper/' => array(
         'tags/' => 'DoorkeeperTagsController',
+        'github-hook/' => 'DoorkeeperGitHubHookController',
       ),
     );
   }
diff --git a/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHub.php b/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHub.php
new file mode 100644
--- /dev/null
+++ b/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHub.php
@@ -0,0 +1,119 @@
+<?php
+
+final class DoorkeeperBridgeGitHub extends DoorkeeperBridge {
+
+  const APPTYPE_GITHUB = 'github';
+  const OBJTYPE_PULL_REQUEST = 'github:pull-request';
+
+  public function canPullRef(DoorkeeperObjectRef $ref) {
+    if ($ref->getApplicationType() != self::APPTYPE_GITHUB) {
+      return false;
+    }
+
+    $types = array(
+      self::OBJTYPE_PULL_REQUEST => true,
+    );
+
+    return isset($types[$ref->getObjectType()]);
+  }
+
+  public function pullRefs(array $refs) {
+
+    $id_map = mpull($refs, 'getObjectID', 'getObjectKey');
+
+    // Object IDs for pull requests are formatted as:
+    //
+    // user:repo:pullid
+    //
+    // since we need both the user and repo name to retrieve
+    // data about a pull request.
+    $data_map = array();
+    foreach ($id_map as $key => $id) {
+      $split = explode(':', $id);
+      $user = str_replace($split[0], '/', '');
+      $repo = str_replace($split[1], '/', '');
+      $pull_id = (int)$split[2];
+      $data_map[$key] = array(
+        'id' => $id,
+        'user' => $user,
+        'repo' => $repo,
+        'pullID' => $pull_id,
+        'getURI' =>
+          'https://api.github.com/repos/'.$user.'/'.$repo.'/pulls/'.$pull_id);
+    }
+
+    // Query the GitHub public API, retrieving all of the information.
+    $futures = array();
+    foreach ($data_map as $key => $data) {
+      $futures[$key] = id(new HTTPSFuture($data['getURI']))
+        ->setMethod('GET')
+        ->setTimeout(30);
+    }
+
+    $results = array();
+    $failed = array();
+    foreach (Futures($futures) as $key => $future) {
+      try {
+        $results[$key] = $future->resolveJSON();
+      } catch (Exception $ex) {
+        if (($ex instanceof HTTPFutureResponseStatus) &&
+            ($ex->getStatusCode() == 404)) {
+          // This indicates that the object has been deleted (or never existed,
+          // or isn't visible to the current user) but it's a successful sync of
+          // an object which isn't visible.
+        } else {
+          // This is something else, so consider it a synchronization failure.
+          phlog($ex);
+          $failed[$key] = $ex;
+        }
+      }
+    }
+
+    // Set all the associated data.
+    foreach ($refs as $ref) {
+      $did_fail = idx($failed, $ref->getObjectKey());
+      if ($did_fail) {
+        // Set at least the key to identify, normally the
+        // name is the name of the PR.
+        $ref->setAttribute('name', 'GitHub PR '.$ref->getObjectID());
+        $ref->setSyncFailed(true);
+        continue;
+      }
+
+      $result = idx($results, $ref->getObjectKey());
+      if (!$result) {
+        continue;
+      }
+
+      $ref->setIsVisible(true);
+      $ref->setAttribute('name', $result['title']);
+      $ref->setAttribute('url', $result['url']);
+      $ref->setAttribute('diffURL', $result['diff_url']);
+      $ref->setAttribute('state', $result['state']);
+      $ref->setAttribute('userLogin', $result['user']['login']);
+      $ref->setAttribute('body', $result['body']);
+      $ref->setAttribute('headGitURL', $result['head']['repo']['git_url']);
+      $ref->setAttribute('headGitSHA', $result['head']['sha']);
+      $ref->setAttribute('headLabel', $result['head']['label']);
+      $ref->setAttribute('baseGitURL', $result['base']['repo']['git_url']);
+      $ref->setAttribute('baseGitSHA', $result['base']['sha']);
+      $ref->setAttribute('baseLabel', $result['base']['label']);
+      $ref->setAttribute('merged', $result['merged']);
+
+      // TODO: Does the data belong on the ref attributes or the
+      // object properties??
+
+      $obj = $ref->getExternalObject();
+      if ($obj->getID()) {
+        continue;
+      }
+
+      $obj->setObjectURI($result['url']);
+
+      $unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
+        $obj->save();
+      unset($unguarded);
+    }
+  }
+
+}
diff --git a/src/applications/doorkeeper/controller/DoorkeeperGitHubHookController.php b/src/applications/doorkeeper/controller/DoorkeeperGitHubHookController.php
new file mode 100644
--- /dev/null
+++ b/src/applications/doorkeeper/controller/DoorkeeperGitHubHookController.php
@@ -0,0 +1,37 @@
+<?php
+
+final class DoorkeeperGitHubHookController extends PhabricatorController {
+
+  // Only allow anonymous access when the page
+  // is being POST'd to (since this is what
+  // GitHub will post to).
+
+  public function shouldRequireLogin() {
+    return $_SERVER['REQUEST_METHOD'] != 'POST';
+  }
+
+  public function shouldRequireEnabledUser() {
+    return $_SERVER['REQUEST_METHOD'] != 'POST';
+  }
+
+  public function shouldAllowPublic() {
+    return $_SERVER['REQUEST_METHOD'] == 'POST';
+  }
+
+  public function processRequest() {
+    $request = $this->getRequest();
+
+    $is_get = $_SERVER['REQUEST_METHOD'] == 'GET';
+
+    if ($is_get) {
+      return id(new AphrontPlainTextResponse())
+        ->setContent('GET test');
+    } else {
+      $payload = json_decode($_POST['payload']);
+
+      return id(new AphrontPlainTextResponse())
+        ->setContent($_POST['payload']);
+    }
+  }
+
+}