curl -X GET 'https://api.github.com/orgs/example-org/actions/hosted-runners/images/custom/10/versions' \
  -H "Authorization: Bearer $GITHUB_TOKEN" \
  -H 'Accept: application/vnd.github+json' \
  -H 'X-GitHub-Api-Version: 2026-03-10'

# GET /orgs/{org}/actions/hosted-runners/images/custom/{image_definition_id}/versions (GitHub API)
Base URL: https://api.github.com
Auth: Authorization; GitHub token; required.
Last verified: 2026-10-20

> List image versions of a custom image for an organization

## Critical Gotchas
* GitHub recommends an `Accept: application/vnd.github+json` header and an explicit `X-GitHub-Api-Version` header.
* Fine-grained tokens only authorize repositories and permissions selected when the token is created.

## cURL
curl -X GET 'https://api.github.com/orgs/example-org/actions/hosted-runners/images/custom/10/versions' \
  -H "Authorization: Bearer $GITHUB_TOKEN" \
  -H 'Accept: application/vnd.github+json' \
  -H 'X-GitHub-Api-Version: 2026-03-10'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| image_definition_id | path | integer | Yes | Image definition ID of custom image |
| org | path | string | Yes | The organization name. The name is not case sensitive. |

## Response example
{"total_count":0,"image_versions":[{}]}

---
Need an API key? Get one at https://github.com/settings/tokens

GET

GET /orgs/{org}/actions/hosted-runners/images/custom/{image_definition_id}/versions — GitHub API

GitHub token (required); https://api.github.com

GitHub API

List image versions of a custom image for an organization

Base URL: https://api.github.com
Auth: Authorization: Bearer <GITHUB_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 192 tokens · Vary: Accept

Critical gotchas

GitHub recommends an Accept: application/vnd.github+json header and an explicit X-GitHub-Api-Version header.

Fine-grained tokens only authorize repositories and permissions selected when the token is created.

cURL

curl -X GET 'https://api.github.com/orgs/example-org/actions/hosted-runners/images/custom/10/versions' \  -H "Authorization: Bearer $GITHUB_TOKEN" \  -H 'Accept: application/vnd.github+json' \  -H 'X-GitHub-Api-Version: 2026-03-10'

Parameters

Name	In	Type	Required	Description
image_definition_id	path	integer	Yes	Image definition ID of custom image
org	path	string	Yes	The organization name. The name is not case sensitive.

Response 200 OK

{
  "total_count": 0,
  "image_versions": [
    {
      "version": "1.0.0",
      "state": "Ready",
      "size_gb": 30,
      "created_on": "2024-11-09T23:39:01Z",
      "state_details": "None"
    }
  ]
}

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