diff --git a/src/applications/repository/conduit/RepositoryQueryConduitAPIMethod.php b/src/applications/repository/conduit/RepositoryQueryConduitAPIMethod.php
--- a/src/applications/repository/conduit/RepositoryQueryConduitAPIMethod.php
+++ b/src/applications/repository/conduit/RepositoryQueryConduitAPIMethod.php
@@ -31,6 +31,7 @@
       'vcsTypes' => 'optional list<string>',
       'remoteURIs' => 'optional list<string>',
       'uuids' => 'optional list<string>',
+      'projectPHIDs' => 'optional list<phid>',
     );
   }
 
@@ -71,6 +72,12 @@
       $query->withUUIDs($uuids);
     }
 
+    $projects = $request->getValue('projectPHIDs', array());
+    if ($projects) {
+      $query->withAnyProjects($projects);
+    }
+    $query->needProjectPHIDs(true);
+
     $pager = $this->newPager($request);
     $repositories = $query->executeWithCursorPager($pager);
 
diff --git a/src/applications/repository/storage/PhabricatorRepository.php b/src/applications/repository/storage/PhabricatorRepository.php
--- a/src/applications/repository/storage/PhabricatorRepository.php
+++ b/src/applications/repository/storage/PhabricatorRepository.php
@@ -141,6 +141,7 @@
         'prefix' => 'phabricator',
         'uri' => $this->getStagingURI(),
       ),
+      'projects'    => $this->getProjectPHIDs(),
     );
   }