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        <title>Application Services - Synapse</title>
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                        <h1 id="registering-an-application-service"><a class="header" href="#registering-an-application-service">Registering an Application Service</a></h1>
<p>The registration of new application services depends on the homeserver used. 
In synapse, you need to create a new configuration file for your AS and add it
to the list specified under the <code>app_service_config_files</code> config
option in your synapse config.</p>
<p>For example:</p>
<pre><code class="language-yaml">app_service_config_files:
- /home/matrix/.synapse/&lt;your-AS&gt;.yaml
</code></pre>
<p>The format of the AS configuration file is as follows:</p>
<pre><code class="language-yaml">id: &lt;your-AS-id&gt;
url: &lt;base url of AS&gt;
as_token: &lt;token AS will add to requests to HS&gt;
hs_token: &lt;token HS will add to requests to AS&gt;
sender_localpart: &lt;localpart of AS user&gt;
namespaces:
  users:  # List of users we're interested in
    - exclusive: &lt;bool&gt;
      regex: &lt;regex&gt;
      group_id: &lt;group&gt;
    - ...
  aliases: []  # List of aliases we're interested in
  rooms: [] # List of room ids we're interested in
</code></pre>
<p><code>exclusive</code>: If enabled, only this application service is allowed to register users in its namespace(s).
<code>group_id</code>: All users of this application service are dynamically joined to this group. This is useful for e.g user organisation or flairs.</p>
<p>See the <a href="https://matrix.org/docs/spec/application_service/unstable.html">spec</a> for further details on how application services work.</p>

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