# Open source API for simplifying RTMS

**URL:** <https://devforum.zoom.us/t/open-source-api-for-simplifying-rtms/141968>\
**Category:** Realtime Media Streams\
**Created:** [February 17, 2026, 5:49pm UTC](https://devforum.zoom.us/t/open-source-api-for-simplifying-rtms/141968 "2026-02-17T17:49:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![noah.duncan](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/noah.duncan/32/51124_2.png) [@noah.duncan](https://devforum.zoom.us/u/noah.duncan)\
**Post date:** [February 17, 2026, 5:49pm UTC](https://devforum.zoom.us/t/open-source-api-for-simplifying-rtms/141968/1 "2026-02-17T17:49:30Z")

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Hi everyone, my name’s Noah and I maintain [Attendee](https://github.com/attendee-labs/attendee), a free open source API that makes it easy to extract recordings and transcripts from meetings.

We recently launched beta support for RTMS. When you receive the `meeting.rtms_started` webhook from Zoom, you forward the webhook payload to the Attendee server. Attendee will spin up the RTMS session, mux the video and audio frames, handle edge cases like the video being paused, and add speaker labels to the video. It will also provide a convenient dashboard to view this data.

We’re looking for beta testers who can provide feedback as well as contributors for the codebase.

If you’re interested in trying Attendee, I recommend watching this video, which gives you a good overview of how it works to simplify RTMS development: [https://www.youtube.com/watch?v=56DzvzJHSv4](https://www.youtube.com/watch?v=56DzvzJHSv4)

Then you should consult the documentation below:  
Attendee docs: [Attendee-managed Zoom RTMS](https://docs.attendee.dev/guides/zoom/zoomrtms)  
Example Notetaker app: [GitHub - attendee-labs/rtms-notetaker-example: Example app showing how to build a Meeting Notetaker with Attendee and Zoom RTMS](https://github.com/attendee-labs/rtms-notetaker-example)  
Example Sales Coach app: [GitHub - attendee-labs/rtms-sales-coach-example: Example app showing how to build an AI Sales Assistant with Attendee and Zoom RTMS](https://github.com/attendee-labs/rtms-sales-coach-example)

For the quickest start, we have a cloud instance at [https://app.attendee.dev/](https://app.attendee.dev/) that gives you 5 hours of recordings free. Instructions to run locally are available [here](https://github.com/attendee-labs/attendee?tab=readme-ov-file#running-in-development-mode).

Happy to answer any questions!