---
title: "Update a Participant"
method: POST
path: "/Accounts/{AccountSid}/Conferences/{ConferenceSid}/Participants/{CallSid}"
tags: ["Conference Participants"]
---

# Update a Participant

`POST /Accounts/{AccountSid}/Conferences/{ConferenceSid}/Participants/{CallSid}`

Changes an active voice-conference participant's mute, hold, coaching, wait-audio, or announcement settings by Call SID. Use [Update Conference](/docs/compatibility-api/rest/conferences/update-conference) to end or announce to the entire conference, and delete the participant to remove only that caller.

#### Permissions

The API token used to authenticate must have the following scope(s) enabled to make a successful request: _Voice_.

[Learn more about API scopes](/docs/platform/your-signalwire-api-space).

## Path parameters

- `AccountSid` string, uuid, required — Universal Unique Identifier.
- `ConferenceSid` string, uuid, required — Universal Unique Identifier.
- `CallSid` string, uuid, required — Universal Unique Identifier.

## Response `200`

The request has succeeded.

- ConferenceParticipantResponse — Response containing a single conference participant.
  - `account_sid` string, uuid, required — Universal Unique Identifier.
  - `call_sid` string, uuid, required — Universal Unique Identifier.
  - `call_sid_to_coach` string, uuid, required — Universal Unique Identifier.
  - `coaching` boolean, required — Whether the participant is coaching another call.
  - `conference_sid` string, uuid, required — Universal Unique Identifier.
  - `date_created` string, required — The date, in RFC 2822 format, this conference participant was created.
  - `status` 'completed' | 'in-progress', required — Conference participant status.
  - `date_updated` string, required — The date, in RFC 2822 format, this conference participant was updated.
  - `end_conference_on_exit` boolean, required — Whether or not a conference ends when a participant leaves the conference call.
  - `muted` boolean, required — Whether or not a participant is muted.
  - `hold` boolean, required — Whether or not a participant is on hold.
  - `start_conference_on_enter` boolean, required — Whether or not a conference will begin when this participant enters the conference call.
  - `uri` string, required — The URI for this conference participant.

## Other responses

- `400` — The request was invalid or cannot be processed. Check the error details for more information.
- `401` — Authentication failed. Please verify your credentials and try again.
- `404` — The requested resource was not found. Please verify the resource identifier.
- `422` — The request could not be processed due to validation errors. Check the error details for more information.

## Changes

- **2026-05-12** `2916d5e3072e` — 5 breaking, 6 info
  - added `#/components/schemas/uuid` to the `CallSidToCoach` request property `allOf` list
  - the `account_sid` response's property type changed from `string` to no type, and format from `uuid` to no format for status `200`
  - the `call_sid` response's property type changed from `string` to no type, and format from `uuid` to no format for status `200`
  - the `call_sid_to_coach` response's property format changed from `uuid` to no format for status `200`
  - …7 more
- **2026-05-12** `5344c0c93a4c` — 1 breaking, 5 info
  - added 'unevaluatedProperties' constraint to the request body
  - added 'unevaluatedProperties' constraint to the response body for the status `200`
  - added 'unevaluatedProperties' constraint to the response body for the status `400`
  - added 'unevaluatedProperties' constraint to the response body for the status `401`
  - …2 more
- **2026-03-04** `2e516ba2383f` — 1 breaking
  - response property `call_sid_to_coach` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
- **2026-01-19** `d5fbaaddfa3e` — 3 breaking, 1 warning, 18 info
  - the `AnnounceUrl` request property format changed from no format to `uri`
  - the `HoldUrl` request property format changed from no format to `uri`
  - the response property `call_sid_to_coach` became nullable for the status `200`
  - removed the request property `Beep`
  - …18 more
- …earlier changes not shown

[Full history](https://skmtc.dev/signalwire/apis/compatibility-api/changes/Accounts/:AccountSid/Conferences/:ConferenceSid/Participants/:CallSid/post.md)

---

[API](https://skmtc.dev/signalwire/apis/compatibility-api.md) · [All operations](https://skmtc.dev/signalwire/apis/compatibility-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/signalwire/compatibility-api/revisions/723316346320/schema)