---
title: "Complete channel selection for a website installation"
method: POST
path: "/slack/add/channels/complete"
tags: ["slack_installations"]
---

# Complete channel selection for a website installation

`POST /slack/add/channels/complete`

Joins the selected public channels, queues the installer's onboarding DM, and consumes the installation token.

## Headers

- `Authorization` string, required

## Request body

- object
  - `channel_ids` string[] — Public Slack channel IDs selected by the installer

## Other responses

- `400` — Bad Request - Invalid parameters or malformed request
- `401` — Unauthorized - Invalid or missing authentication
- `403` — Forbidden - User lacks permission to access this resource
- `404` — Not Found - Resource does not exist
- `422` — Unprocessable Entity - Invalid request parameters or validation errors
- `429` — Too Many Requests - Rate limit exceeded
- `500` — Internal Server Error - Unexpected server error

## Changes

- **2026-08-11** `a67e54becfe9` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/rhythms/apis/rhythms-params-in-body/changes/slack/add/channels/complete/post.md)

---

[API](https://skmtc.dev/rhythms/apis/rhythms-params-in-body.md) · [All operations](https://skmtc.dev/rhythms/apis/rhythms-params-in-body/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/rhythms/rhythms-params-in-body/revisions/925d5943c46b/schema)