---
title: "Join Matchmaking Queue"
method: POST
path: "/api/matchmaking/join/{queue_id}"
tags: ["Matchmaking"]
---

# Join Matchmaking Queue

`POST /api/matchmaking/join/{queue_id}`

## Request

- Base URL: `https://api.agentstack.tech` (the document declares no server; this is the origin it was published from)
- URL: `https://api.agentstack.tech/api/matchmaking/join/{queue_id}`
- Auth: one of:
  - API key in header `X-API-Key`
  - HTTP bearer

Join matchmaking queue

Body (optional):
{
    "criteria": {
        "level": 15,
        "rating": 1250,
        "region": "eu-west"
    }
}

If criteria not provided, will be auto-extracted from user.data

## Path parameters

- `queue_id` string, required

## Headers

- `Idempotency-Key` string

## Request body

- JoinQueueRequest: Join queue request
  - `criteria` object, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `400`: Bad Request
- `401`: Unauthorized
- `403`: Forbidden
- `404`: Not Found
- `409`: Conflict
- `422`: Validation Error
- `429`: Too Many Requests
- `500`: Internal Server Error

---

[API](https://skmtc.dev/agentstack/apis/agentstack-core-api.md) · [All operations](https://skmtc.dev/agentstack/apis/agentstack-core-api/llms.txt) · [OpenAPI document](https://skmtc.dev/agentstack/apis/agentstack-core-api/revisions/79f4a4dd8813?raw)