---
title: "Add a Participant to a Channel."
method: POST
path: "/v1/Interactions/{InteractionSid}/Channels/{ChannelSid}/Participants"
tags: ["FlexV1InteractionChannelParticipant"]
---

# Add a Participant to a Channel.

`POST /v1/Interactions/{InteractionSid}/Channels/{ChannelSid}/Participants`

Add a Participant to a Channel.

## Path parameters

- `InteractionSid` string, required
- `ChannelSid` string, required

## Response `200`

OK

- FlexV1InteractionInteractionChannelInteractionChannelParticipant
  - `sid` string, nullable — The unique string created by Twilio to identify an Interaction Channel Participant resource.
  - `type` 'supervisor' | 'customer' | 'external' | 'agent' | 'unknown' — Participant type. Can be: `agent`, `customer`, `supervisor`, `external`, `unknown`
  - `interaction_sid` string, nullable — The Interaction Sid for this channel.
  - `channel_sid` string, nullable — The Channel Sid for this Participant.
  - `url` string, uri, nullable
  - `routing_properties` unknown

## Changes

- **2025-09-04** (v1) `05805a8f9c85` — 1 breaking, 1 info
  - removed the success response with the status `201`
  - added the success response with the status `200`
- **2025-07-03** (v1) `0e4cd336d78a` — 1 breaking, 2 info
  - the `routing_properties` response's property type changed from `object` to no type for status `201`
  - the `MediaProperties` request property type was generalized from `object` to no type
  - the `RoutingProperties` request property type was generalized from `object` to no type
- **2025-03-11** (v1) `65f781b3f6b1` — 3 breaking
  - the `MediaProperties` request property type changed from no type to `object`
  - the `RoutingProperties` request property type changed from no type to `object`
  - the `routing_properties` response's property type changed from no type to `object` for status `201`
- **2024-02-27** (v1) `c3d1e976c68c` — 2 info
  - added the new optional request property `RoutingProperties`
  - added the optional property `routing_properties` to the response with the `201` status
- **2023-08-10** (v1) `c37c20a0a1cb` — 1 info
  - api tag `FlexV1InteractionChannelParticipant` added

[Change history](https://skmtc.dev/twilio/apis/twilio-flex/changes/v1/Interactions/:InteractionSid/Channels/:ChannelSid/Participants/post.md)

---

[API](https://skmtc.dev/twilio/apis/twilio-flex.md) · [All operations](https://skmtc.dev/twilio/apis/twilio-flex/llms.txt) · [OpenAPI document](https://skmtc.dev/twilio/apis/twilio-flex/revisions/ea1db919b6cc?raw)