---
title: "Unmute participants in room session."
method: POST
path: "/room_sessions/{room_session_id}/actions/unmute"
tags: ["Room Sessions"]
---

# Unmute participants in room session.

`POST /room_sessions/{room_session_id}/actions/unmute`

## Request

- Base URL: `https://api.telnyx.com/v2`
- URL: `https://api.telnyx.com/v2/room_sessions/{room_session_id}/actions/unmute`
- Auth: none required

Unmutes the selected participants in the specified room session. Apply the action to a list of participant IDs or to `all`, with optional participant IDs excluded from the action.

## Path parameters

- `room_session_id` string, uuid, required

## Request body

- ActionsParticipantsRequest
  - `participants` union: Either a list of participant id to perform the action on, or the keyword "all" to perform the action on all participant.
    - 'all'
    - string[]
  - `exclude` string[]: List of participant id to exclude from the action.

## Response `200`

Success Action Response

- object
  - `data` object
    - `result` string

## Other responses

- `4XX`: Unexpected error

## Changes

- **2026-10-15** `a72569d69430`: 1 breaking, 1 info
  - removed `subschema #1: all_participants` from the `participants` request property `oneOf` list
  - added `subschema #1` to the `participants` request property `oneOf` list

[Operation history](https://skmtc.dev/team-telnyx/apis/telnyx-api/changes/room_sessions/:room_session_id/actions/unmute/post.md)

---

[API](https://skmtc.dev/team-telnyx/apis/telnyx-api.md) - [All operations](https://skmtc.dev/team-telnyx/apis/telnyx-api/llms.txt) - [OpenAPI document](https://skmtc.dev/team-telnyx/apis/telnyx-api/revisions/0f17b8167873?raw)