Zulip supports integration with Pingdom and can notify you of uptime status changes from your Pingdom dashboard.

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

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

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

Next, under following url:

https://my.pingdom.com/reports/integration/settings

create your integration by clicking on Add Integration button and filling form as following:

Last, during creating or editing your check, scroll down to Connect Integrations section and ensure your integration is checked

Congratulations! You're done!
Example Zulip notification looks like this: