---
title: "Update an arena"
method: PUT
path: "/v1/arenas/{aid}"
---

# Update an arena

`PUT /v1/arenas/{aid}`

## Request

- Base URL: `https://api.harnessrouter.ai`
- URL: `https://api.harnessrouter.ai/v1/arenas/{aid}`
- Auth: none declared

## Path parameters

- `aid` string, required

## Request body

- ArenaBody
  - `name` string
  - `columns` ArenaColumnBody[], nullable
    - `id` string, required
    - `harness_id` string, required
    - `harness_name` string
    - `base_id` string
    - `model` string
    - `session_id` string
    - `winner` boolean
  - `split` number, nullable

## Response `200`

Successful Response

- object

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/harnessrouter/apis/harnessrouter-api.md) - [All operations](https://skmtc.dev/harnessrouter/apis/harnessrouter-api/llms.txt) - [OpenAPI document](https://skmtc.dev/harnessrouter/apis/harnessrouter-api/revisions/a02863eb5a8f?raw)