Zulip supports integration with Pivotal Tracker and can notify you of changes to the stories in your Pivotal Tracker project.

First, create the stream you'd like to use for Pivotal Tracker notifications, and subscribe all interested parties to this stream. We recommend the name pivotal.

Next, in the Settings page for your project, choose the Integrations tab. Scroll down to the Activity Web Hook section, and enter the following url:

{{ external_api_uri_subdomain }}/v1/external/pivotal?api_key=abcdefgh&stream=pivotal

where api_key is the API key of your Zulip bot, and stream is the stream name you want the notifications sent to.

Choose version 5 of the API. Zulip supports both version 3 and version 5, but version 5 contains more information that lets Zulip format more useful messages.

Congratulations! You're done!
When you make changes in Pivotal Tracker they will be reflected in Zulip: