diff --git a/actions/apiconversation.php b/actions/apiconversation.php
new file mode 100644
index 0000000000..fefb5b67a5
--- /dev/null
+++ b/actions/apiconversation.php
@@ -0,0 +1,242 @@
+<?php
+/**
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2011, StatusNet, Inc.
+ *
+ * Show a stream of notices in a particular conversation
+ * 
+ * PHP version 5
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  API
+ * @package   StatusNet
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2011 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+
+if (!defined('STATUSNET')) {
+    // This check helps protect against security problems;
+    // your code file can't be executed directly from the web.
+    exit(1);
+}
+
+require_once INSTALLDIR . '/lib/apiauth.php';
+
+/**
+ * Show a stream of notices in a particular conversation
+ *
+ * @category  API
+ * @package   StatusNet
+ * @author    Evan Prodromou <evan@status.net>
+ * @copyright 2011 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+
+class ApiconversationAction extends ApiAuthAction
+{
+	protected $conversation = null;
+	protected $notices      = null;
+	
+    /**
+     * For initializing members of the class.
+     *
+     * @param array $argarray misc. arguments
+     *
+     * @return boolean true
+     */
+
+    function prepare($argarray)
+    {
+        parent::prepare($argarray);
+        
+        $convId = $this->trimmed('id');
+        
+        if (empty($convId)) {
+        	throw new ClientException(_m('no conversation id'));
+        }
+        
+        $this->conversation = Conversation::staticGet('id', $convId);
+        
+        if (empty($this->conversation)) {
+        	throw new ClientException(sprintf(_m('No conversation with id %d'), $convId),
+        							  404);
+        }
+        
+        $profile = Profile::current();
+        
+        $stream = new ConversationNoticeStream($convId, $profile);
+        
+        $notice = $stream->getNotices(($this->page-1) * $this->count,
+                                      $this->count,
+                                      $this->since_id,
+                                      $this->max_id);
+        
+        $this->notices = $notice->fetchAll();
+                                 
+        return true;
+    }
+
+    /**
+     * Handler method
+     *
+     * @param array $argarray is ignored since it's now passed in in prepare()
+     *
+     * @return void
+     */
+
+    function handle($argarray=null)
+    {
+        $sitename   = common_config('site', 'name');
+        // TRANS: Timeline title for user and friends. %s is a user nickname.
+        $title      = _("Conversation");
+        $id         = common_local_url('apiconversation', array('id' => $this->conversation->id, 'format' => $this->format));
+        $link       = common_local_url('conversation', array('id' => $this->conversation->id));
+
+        $self       = $id;
+        
+        switch($this->format) {
+        case 'xml':
+            $this->showXmlTimeline($this->notices);
+            break;
+        case 'rss':
+            $this->showRssTimeline(
+                $this->notices,
+                $title,
+                $link,
+                null,
+                null,
+                null,
+                $self
+            );
+            break;
+        case 'atom':
+
+            header('Content-Type: application/atom+xml; charset=utf-8');
+
+            $atom = new AtomNoticeFeed($this->auth_user);
+
+            $atom->setId($id);
+            $atom->setTitle($title);
+            $atom->setUpdated('now');
+
+            $atom->addLink($link);
+            $atom->setSelfLink($self);
+
+            $atom->addEntryFromNotices($this->notices);
+            $this->raw($atom->getString());
+
+            break;
+        case 'json':
+            $this->showJsonTimeline($this->notices);
+            break;
+        case 'as':
+            header('Content-Type: ' . ActivityStreamJSONDocument::CONTENT_TYPE);
+            $doc = new ActivityStreamJSONDocument($this->auth_user);
+            $doc->setTitle($title);
+            $doc->addLink($link, 'alternate', 'text/html');
+            $doc->addItemsFromNotices($this->notices);
+            $this->raw($doc->asString());
+            break;
+        default:
+            // TRANS: Client error displayed when coming across a non-supported API method.
+            $this->clientError(_('API method not found.'), $code = 404);
+            break;
+        }
+    }
+
+    /**
+     * Return true if read only.
+     *
+     * MAY override
+     *
+     * @param array $args other arguments
+     *
+     * @return boolean is read only action?
+     */
+
+    function isReadOnly($args)
+    {
+        if ($_SERVER['REQUEST_METHOD'] == 'GET' ||
+            $_SERVER['REQUEST_METHOD'] == 'HEAD') {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    /**
+     * Return last modified, if applicable.
+     *
+     * MAY override
+     *
+     * @return string last modified http header
+     */
+    function lastModified()
+    {
+        if (!empty($this->notices) && (count($this->notices) > 0)) {
+            return strtotime($this->notices[0]->created);
+        }
+
+        return null;
+    }
+
+    /**
+     * Return etag, if applicable.
+     *
+     * MAY override
+     *
+     * @return string etag http header
+     */
+
+    function etag()
+    {
+        if (!empty($this->notices) && (count($this->notices) > 0)) {
+
+            $last = count($this->notices) - 1;
+
+            return '"' . implode(
+                ':',
+                array($this->arg('action'),
+                      common_user_cache_hash($this->auth_user),
+                      common_language(),
+                      $this->user->id,
+                      strtotime($this->notices[0]->created),
+                      strtotime($this->notices[$last]->created))
+            )
+            . '"';
+        }
+        
+        return null;
+    }
+
+    /**
+     * Does this require authentication?
+     *
+     * @return boolean true if delete, else false
+     */
+
+    function requiresAuth()
+    {
+        if ($_SERVER['REQUEST_METHOD'] == 'GET' ||
+            $_SERVER['REQUEST_METHOD'] == 'HEAD') {
+            return false;
+        } else {
+            return true;
+        }
+    }
+}
\ No newline at end of file
diff --git a/lib/router.php b/lib/router.php
index dbf3aaeb97..9c15d7bf24 100644
--- a/lib/router.php
+++ b/lib/router.php
@@ -774,6 +774,11 @@ class Router
                         array('action' => 'ApiGroupProfileUpdate',
                               'id' => '[a-zA-Z0-9]+',
                               'format' => '(xml|json)'));
+                              
+            $m->connect('api/statusnet/conversation/:id.:format',
+                        array('action' => 'apiconversation',
+                              'id' => '[0-9]+',
+                              'format' => '(xml|json|rss|atom|as)'));
 
             // Lists (people tags)