---
title: "Start clocks of a game"
method: POST
path: "/api/challenge/{gameId}/start-clocks"
tags: ["Challenges"]
---

# Start clocks of a game

`POST /api/challenge/{gameId}/start-clocks`

Start the clocks of a game immediately, even if a player has not yet made a move.
Requires the OAuth tokens of both players with `challenge:write` scope.
If the clocks have already started, the call will have no effect.

For AI games with only one player, omit the `token2` parameter.

## Path parameters

- `gameId` string, required — ID of the game

## Query parameters

- `token1` string, required
- `token2` string

## Response `200`

The clock of a game was successfully started.

- Ok
  - `ok` boolean, required

---

[API](https://skmtc.net/lichess/apis/lichess-org-api-reference.md) · [All operations](https://skmtc.net/lichess/apis/lichess-org-api-reference/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/lichess/lichess-org-api-reference/versions/1425db81eb3b/schema)