They have an API, not sure about channels specifically though. https://zulip.com/api/ https://zulip.com/api/ https://zulip.com/api/endpoints/ https://zulip.co

They have an API, not sure about channels specifically though. https://zulip.com/api/ https://zulip.com/api/ https://zulip.com/api/endpoints/ https://zulip.com/api/endpoints/