List the participants of a call

Lists who is in the conference room one of your live calls is in: each participant's own call id, who they are, whether the room mutes them, and how long they have been connected. The call itself is one of the participants. Use a participant's id to mute or remove them; it is also a call id, so GET /v3/calls/{id} accepts it. A call that has ended answers 409, as does a call that is not in a conference.

GET
/v3/calls/{id}/participants

Response Body

application/json

application/json

application/json

application/json

application/json

curl -X GET "https://example.com/v3/calls/call_9f2ab000-0000-4000-8000-000000000001/participants"
{
  "success": true,
  "data": [
    {
      "id": "call_9f2ab000-0000-4000-8000-000000000001",
      "kind": "user",
      "value": "agent-42",
      "muted": false,
      "duration_seconds": 184
    },
    {
      "id": "call_9f2ab000-0000-4000-8000-000000000002",
      "kind": "number",
      "value": "+14155551234",
      "muted": true,
      "duration_seconds": 96
    }
  ],
  "error": null,
  "meta": {
    "request_id": "req_7X9zKp2jDw",
    "timestamp": "2026-10-06T09:10:22.7053037+00:00",
    "version": "v3"
  }
}
{
  "success": false,
  "data": null,
  "error": {
    "code": "VALIDATION_001",
    "message": "Request validation failed",
    "details": {
      "id": [
        "'id' must be a call id, such as call_9f2ab000-0000-4000-8000-000000000001"
      ]
    },
    "doc_url": "https://docs.sent.dm/reference/api/error-catalog"
  },
  "meta": {
    "request_id": "req_7X9zKp2jDw",
    "timestamp": "2026-10-06T09:10:22.7053073+00:00",
    "version": "v3"
  }
}
Empty
Empty
{
  "success": false,
  "data": null,
  "error": {
    "code": "RESOURCE_015",
    "message": "Call not found",
    "details": null,
    "doc_url": "https://docs.sent.dm/reference/api/error-catalog"
  },
  "meta": {
    "request_id": "req_7X9zKp2jDw",
    "timestamp": "2026-10-06T09:10:22.7053077+00:00",
    "version": "v3"
  }
}
{
  "success": false,
  "data": null,
  "error": {
    "code": "CONFLICT_009",
    "message": "Call is not in a conference",
    "details": null,
    "doc_url": "https://docs.sent.dm/reference/api/error-catalog"
  },
  "meta": {
    "request_id": "req_7X9zKp2jDw",
    "timestamp": "2026-10-06T09:10:22.7053081+00:00",
    "version": "v3"
  }
}
{
  "success": false,
  "data": null,
  "error": {
    "code": "INTERNAL_001",
    "message": "An unexpected error occurred while listing the participants",
    "details": null,
    "doc_url": "https://docs.sent.dm/reference/api/error-catalog"
  },
  "meta": {
    "request_id": "req_7X9zKp2jDw",
    "timestamp": "2026-10-06T09:10:22.7053092+00:00",
    "version": "v3"
  }
}

Add a participant to a call POST

Dials one of your app users or a phone number into a call that is in a conference room, and answers with the participant's own call record. The participant is a call of their own: it has its own id, can be looked up and hung up, and is billed and reported through call.completed and call.failed like any other call. A phone participant is called from caller_id, which must be one of your numbers, or from the call's owning number when omitted, and needs a destination you may call and a positive balance. Only a call your answer connected to a conference can take participants: a call connected to a user or a number answers 409.

Update a participant PATCH

Mutes or unmutes one participant of the conference room a live call is in, named by the participant's own call id from the participants list: send muted true to silence them, muted false to let them be heard again. Muting a participant who is already muted succeeds, as does unmuting one who is not. A participant who is not in this call's room answers 404. A call that has ended answers 409, as does a call that is not in a conference.