---
title: "Add channel to contact"
method: POST
path: "/v1/contacts/{contactId}/channels"
---

# Add channel to contact

`POST /v1/contacts/{contactId}/channels`

Add a new communication channel to an existing contact.

## Path parameters

- `contactId` string, required

## Request body

- AddChannelRequest — Request body to add a channel to a contact.
  - `channel` 'sms' | 'whatsapp' | 'email' | 'telegram' | 'instagram' | 'messenger' | 'voice', required — Channel type.
  - `identifier` string, required — Channel identifier (phone number in E.164 format or email address).
  - `countryCode` string — ISO country code for phone numbers.
  - `label` string — Optional label for the channel.
  - `isPrimary` boolean — Whether this should be the primary channel for its type.

## Response `201`

Channel added.

- ContactChannelResponse
  - `channel` ContactChannel, required — A communication channel for a contact.
    - `id` string, required
    - `channel` 'sms' | 'whatsapp' | 'email' | 'telegram' | 'instagram' | 'messenger' | 'voice', required — Channel type.
    - `identifier` string, required — Channel identifier (phone number or email address).
    - `countryCode` string — ISO country code for phone numbers.
    - `label` string — Optional label for the channel.
    - `isPrimary` boolean, required — Whether this is the primary channel for its type.
    - `verified` boolean, required — Whether this channel has been verified.
    - `metrics` object — Delivery metrics for this channel.
      - `successCount` integer
      - `failureCount` integer
      - `totalAttempts` integer
      - `avgDeliveryTimeMs` number
      - `lastSuccessAt` string, date-time
    - `lastInboundAt` string, date-time — Last time a message was received on this channel.
    - `metadata` object
    - `createdAt` string, date-time, required
    - `updatedAt` string, date-time

## Other responses

- `400` — Invalid request or duplicate identifier.
- `401` — Unauthorized.
- `404` — Contact not found.

---

[API](https://skmtc.net/zavudev/apis/zavu-unified-messaging-layer-api.md) · [All operations](https://skmtc.net/zavudev/apis/zavu-unified-messaging-layer-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/zavudev/zavu-unified-messaging-layer-api/revisions/4dacdff2adf8/schema)