diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index 689cccbd6a..7e7d87b05b 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -121,6 +121,7 @@ phutil_register_library_map(array(
     'ConduitAPI_conpherence_Method' => 'applications/conpherence/conduit/ConduitAPI_conpherence_Method.php',
     'ConduitAPI_conpherence_createthread_Method' => 'applications/conpherence/conduit/ConduitAPI_conpherence_createthread_Method.php',
     'ConduitAPI_conpherence_querythread_Method' => 'applications/conpherence/conduit/ConduitAPI_conpherence_querythread_Method.php',
+    'ConduitAPI_conpherence_querytransaction_Method' => 'applications/conpherence/conduit/ConduitAPI_conpherence_querytransaction_Method.php',
     'ConduitAPI_daemon_launched_Method' => 'applications/daemon/conduit/ConduitAPI_daemon_launched_Method.php',
     'ConduitAPI_daemon_log_Method' => 'applications/daemon/conduit/ConduitAPI_daemon_log_Method.php',
     'ConduitAPI_daemon_setstatus_Method' => 'applications/daemon/conduit/ConduitAPI_daemon_setstatus_Method.php',
@@ -1961,6 +1962,7 @@ phutil_register_library_map(array(
     'ConduitAPI_conpherence_Method' => 'ConduitAPIMethod',
     'ConduitAPI_conpherence_createthread_Method' => 'ConduitAPI_conpherence_Method',
     'ConduitAPI_conpherence_querythread_Method' => 'ConduitAPI_conpherence_Method',
+    'ConduitAPI_conpherence_querytransaction_Method' => 'ConduitAPI_conpherence_Method',
     'ConduitAPI_daemon_launched_Method' => 'ConduitAPIMethod',
     'ConduitAPI_daemon_log_Method' => 'ConduitAPIMethod',
     'ConduitAPI_daemon_setstatus_Method' => 'ConduitAPIMethod',
diff --git a/src/applications/conpherence/conduit/ConduitAPI_conpherence_querytransaction_Method.php b/src/applications/conpherence/conduit/ConduitAPI_conpherence_querytransaction_Method.php
new file mode 100644
index 0000000000..f6ea2ad1ef
--- /dev/null
+++ b/src/applications/conpherence/conduit/ConduitAPI_conpherence_querytransaction_Method.php
@@ -0,0 +1,95 @@
+<?php
+
+/**
+ * @group conduit
+ */
+final class ConduitAPI_conpherence_querytransaction_Method
+  extends ConduitAPI_conpherence_Method {
+
+
+  public function getMethodDescription() {
+    return pht(
+      'Query for transactions for the logged in user within a specific '.
+      'conpherence thread. You can specify the thread by id or phid. '.
+      'Otherwise, specify limit and offset to query the most recent '.
+      'transactions within the conpherence for the logged in user.');
+  }
+
+  public function defineParamTypes() {
+    return array(
+      'threadID' => 'optional int',
+      'threadPHID' => 'optional phid',
+      'limit' => 'optional int',
+      'offset' => 'optional int'
+    );
+  }
+
+  public function defineReturnType() {
+    return 'nonempty dict';
+  }
+
+  public function defineErrorTypes() {
+    return array(
+      'ERR_USAGE_NO_THREAD_ID' => pht(
+        'You must specify a thread id or thread phid to query transactions '.
+        'from.')
+    );
+  }
+
+  protected function execute(ConduitAPIRequest $request) {
+    $user = $request->getUser();
+    $thread_id = $request->getValue('threadID');
+    $thread_phid = $request->getValue('threadPHID');
+    $limit = $request->getValue('limit');
+    $offset = $request->getValue('offset');
+
+    $query = id(new ConpherenceThreadQuery())
+      ->setViewer($user);
+
+    if ($thread_id) {
+      $query->withIDs(array($thread_id));
+    } else if ($thread_phid) {
+      $query->withPHIDs(array($thread_phid));
+    } else {
+      throw new ConduitException('ERR_USAGE_NO_THREAD_ID');
+    }
+
+    $conpherence = $query->executeOne();
+
+    $query = id(new ConpherenceTransactionQuery())
+      ->setViewer($user)
+      ->withObjectPHIDs(array($conpherence->getPHID()))
+      ->setLimit($limit)
+      ->setOffset($offset);
+
+    $transactions = $query->execute();
+
+    $data = array();
+    foreach ($transactions as $transaction) {
+      $comment = null;
+      $comment_obj = $transaction->getComment();
+      if ($comment_obj) {
+        $comment = $comment_obj->getContent();
+      }
+      $title = null;
+      $title_obj = $transaction->getTitle();
+      if ($title_obj) {
+        $title = $title_obj->getHTMLContent();
+      }
+      $id = $transaction->getID();
+      $data[$id] = array(
+        'transactionID' => $id,
+        'transactionType' => $transaction->getTransactionType(),
+        'transactionTitle' => $title,
+        'transactionComment' => $comment,
+        'transactionOldValue' => $transaction->getOldValue(),
+        'transactionNewValue' => $transaction->getNewValue(),
+        'transactionMetadata' => $transaction->getMetadata(),
+        'authorPHID' => $transaction->getAuthorPHID(),
+        'dateCreated' => $transaction->getDateCreated(),
+        'conpherenceID' => $conpherence->getID(),
+        'conpherencePHID' => $conpherence->getPHID());
+    }
+    return $data;
+  }
+}