`meeting.chat_message_sent` webhook not firing while other meeting webhooks work

API and Webhooks Meetings
1

API Endpoint(s) and/or Zoom API Event(s)

meeting.chat_message_sent

Description

We are trying to receive in-meeting chat messages through the meeting.chat_message_sent webhook event.

Zoom Technical Support has already confirmed that the In-Meeting Chat DLP feature has been enabled on our account from Zoom’s side.

Our OAuth app is configured with the In-meeting chat message event subscription and the required Meeting chat scopes.

Our webhook endpoint is working correctly and is actively receiving other Zoom meeting events.

However, meeting.chat_message_sent is never delivered.

Error?

There is no HTTP error because Zoom does not appear to send the meeting.chat_message_sent request to our webhook endpoint at all.

During the same live meeting, we successfully received:

  • meeting.participant_joined

  • meeting.participant_joined_waiting_room

  • meeting.participant_left

  • meeting.ended

Webhook signatures were valid and the events were processed successfully.

But no meeting.chat_message_sent event was received or recorded.

How To Reproduce

  1. App type: OAuth App.

  2. Enable the event subscription for In-meeting chat message received.

  3. Enable the required Meeting chat read scopes and live meeting chat update/delete scopes.

  4. Start a live Zoom meeting.

  5. Confirm that normal meeting webhooks are reaching the configured webhook endpoint.

  6. Send a unique message to Everyone in the meeting chat.

Our test message was:

ZOOMGATE-WEBHOOK-TEST-002

Test meeting ID:

81089547610

Test time:

Approximately 2026-08-25 02:18 GMT+3:30

At approximately the same time our backend successfully received:

meeting.participant_joined

However, no meeting.chat_message_sent event reached the endpoint.

Our internal webhook diagnostics confirmed:

  • Other Zoom meeting webhooks were received within the same 5-minute window.

  • Valid Zoom webhook signatures were present.

  • The events were successfully processed.

  • No chat webhook event was present in our webhook database.

  • No chat webhook event was present in our server webhook trace.

Zoom Technical Support has already enabled DLP and advised us to escalate this behavior through the Developer Forum.

Could you please verify whether meeting.chat_message_sent is fully enabled/entitled for our OAuth app/account, or whether additional backend enablement is required?

We can privately provide the App ID / Client ID, Account ID, webhook endpoint, Support case number, and additional webhook logs if required.