---
title: "Join Cluster"
method: POST
path: "/cluster/join"
tags: ["Cluster"]
---

# Join Cluster

`POST /cluster/join`

Join an existing cluster

## Request body

- InternalHandlersClusterJoinClusterRequest
  - `clusterKey` string, required
  - `leaderIp` string, required
  - `nodeId` string, required
  - `nodeIp` string, required

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden
- `409` — Conflict
- `413` — Request Entity Too Large
- `500` — Internal Server Error
- `503` — Service Unavailable

## Changes

- **2026-08-28** `afb6dfed3935` — 1 breaking
  - removed the success response with the status `200`
- **2026-08-12** `9a5026bf9057` — 5 info
  - added the non-success response with the status `401`
  - added the non-success response with the status `403`
  - added the non-success response with the status `409`
  - added the non-success response with the status `413`
  - …1 more
- **2025-09-19** `dc875965a5da` — 1 info
  - endpoint added
- **2025-03-11** `2b736ca1b025` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/alchemillahq/apis/sylve-api/changes/cluster/join/post.md)

---

[API](https://skmtc.dev/alchemillahq/apis/sylve-api.md) · [All operations](https://skmtc.dev/alchemillahq/apis/sylve-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/alchemillahq/sylve-api/revisions/b7a0c0d622eb/schema)