You can configure Hookshot to bridge ChallengeHound activites into Matrix.

Getting the API secret.

You will need to email ChallengeHound support for an API token. They seem happy to provide one as long as you are an admin of a challenge. See this support article

  token: <the token>


You can add a new challenge hound challenge by command:

challengehound add

and remove it with the same command

challengehound remove

Hookshot will periodically refetch activities from the challenge and send a notice when a new one is completed. Note that Hookshot uses your configured cache to store seen activities. If you have not configured Redis caching, it will default to in-memory storage which means activites will repeat on restart.