---
title: "Open tournament registration"
method: POST
path: "/tournaments/{identifier}/registration/open"
tags: ["Tournament: Lifecycle"]
---

# Open tournament registration

`POST /tournaments/{identifier}/registration/open`

Moves an APPROVED tournament to REGISTRATION_OPEN. Takes no request body. Registration can only be opened from DRAFT or REGISTRATION_CLOSED; any other status answers 400. A tournament that is not APPROVED answers 403 error_approval_required. Side effects worth knowing about: a PUBLIC tournament becomes publicly listed, a `tournament.registration_opened` webhook is emitted, and when check-in is required and a start time is set the check-in announcement is scheduled. Requires an API key holding the tournaments lifecycle capability whose owner is a tournament ADMIN - a tournamentStaff MODERATOR is NOT sufficient and receives 403.

## Path parameters

- `identifier` string, required — Tournament slug.

## Response `200`

Registration is open.

- TournamentOpenRegistrationResponse — Result of opening tournament registration.
  - `success` true, required
  - `status` 'REGISTRATION_OPEN', required — The lifecycle status this call set.
  - `timestamp` string, required

## Other responses

- `400` — Bad request (invalid body, cursor, limit, or date).
- `401` — Missing or invalid API key.
- `403` — API key lacks the required permission.
- `404` — Resource not found.
- `429` — Rate limited.
- `500` — Internal server error.

---

[API](https://skmtc.net/teambattles/apis/teambattles-api.md) · [All operations](https://skmtc.net/teambattles/apis/teambattles-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/teambattles/teambattles-api/revisions/2ffe8fb53b7d/schema)