---
title: "Approve a tournament application"
method: POST
path: "/tournaments/{identifier}/applications/{participantId}/approve"
tags: ["Tournament: Registration"]
---

# Approve a tournament application

`POST /tournaments/{identifier}/applications/{participantId}/approve`

Approves a PENDING application, moving the team into the tournament and incrementing the participant count. Answers 409 error_tournament_full when the tournament is at capacity and 400 error_invalid_input when the application is not pending. Requires the tournaments registration capability and MANAGER authority on the tournament - a tournament MODERATOR qualifies. A participant belonging to another tournament answers 404, identically to an unknown one.

## Path parameters

- `identifier` string, required — Tournament slug.
- `participantId` string, required — Tournament participant ID.

## Response `200`

The application was approved.

- TournamentWriteAck — Acknowledgement returned by the tournament write endpoints whose backing operation has nothing to return - the organizer writes (endpoints 22-34), the team roster writes (40, 41), and the competitor self actions that neither mint nor resolve a row (38, 39, 44, 45, 47). Endpoints that mint a row answer with that row's id instead, and the two respond endpoints (42, 46) answer with the decision they recorded.
  - `success` true, required — Always true; failures are error responses.
  - `timestamp` string, required — Response generation time (ISO 8601).

## 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.
- `409` — Conflict.
- `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)