Developer Changelog

Add chat message media data support for meetings and webinars, meeting-type scoping for auto-start, and an Always allow in my meetings option for host approval.

Starting on November 15, 2026, RTMS will require TLS version 1.2 or 1.3 on all connections.

Add REST API support for starting RTMS for meeting participants, add chat message media data support with 5 new event types for meetings and webinars, updates to protocol definitions including new and updated enums, improve PSTN user identification for simultaneous participants.

Add fields to existing rtms_started webhook events, add parameter to the signaling handshake request, updates to the audio, video, and screen share events, and add new ZCC-Voice event type.

New RTMS SDK version.

Add RTMS integration with Zoom Contact Center, a reorganized audio parameters matrix, single individual video stream subscription, stream closure requests, and media-socket timeout extension.

RTMS is now available for use with Zoom Contact Center.

Added new webhooks for use with Zoom Contact Center.

Added a new enable_lid parameter for transcripts. Changed the internal service for transcription.

RTMS apps can now be used in webinars. The infrastructure developed for RTMS meetings can be easily repurposed to support RTMS in webinars.

RTMS SDK v1.0.0 is now available.

The Update participant Real-Time Media Streams (RTMS) app status API has been updated.

Added new session.rtms_interrupted, session.rtms_started, and session.rtms_stopped webhook events for use with Video SDK.

The RTMS November release includes the RTMS SDK for Python, updates to the RTMS SDK for Node, updates to the transcript data event, and enhanced billing logic.

This RTMS release delivers cross-platform support, including Zoom for Gov and mobile clients. Key enhancements feature client-initiated failover capabilities, improving connection stability and overall reliability. Also, added the id_field to the rtms.concurrency_limited webhook.

New meeting_uuid field in RTMS webhook meeting.rtms_concurrency_limited.

Screen share data is now available.

Screen share data is now available.

Introduced webhook events to alert app owners when concurrent stream usage approaches or exceeds defined limits.

New features for RTMS in Zoom v6.5.5: Host controls, participants can launch RTMS apps, Zoom Apps JS SDK APIs and more.