---
title: "List skill versions"
method: GET
path: "/api/skills/{skillId}/versions"
tags: ["Skills"]
---

# List skill versions

`GET /api/skills/{skillId}/versions`

## Request

- Base URL: `https://app.cotool.ai`
- URL: `https://app.cotool.ai/api/skills/{skillId}/versions`
- Auth: HTTP bearer

List all versions for a skill in descending order.

## Path parameters

- `skillId` string, uuid, required: Unique identifier for the skill

## Response `200`

Successful response

- object[]
  - `id` string, uuid, required: Unique identifier for the skill version
  - `skillId` string, uuid, required: Parent skill ID
  - `version` integer, required: Monotonic version number for the skill
  - `createdByUserId` string, nullable, required: User who created this version, if available
  - `createdAt` string, required: Timestamp when this version was created

## Other responses

- `400`: Bad request — input validation failed or the request was malformed
- `401`: Unauthorized — missing or invalid API key / session
- `403`: Forbidden — the authenticated user lacks the required permissions
- `500`: Internal server error

---

[API](https://skmtc.dev/cotool/apis/cotool-api.md) - [All operations](https://skmtc.dev/cotool/apis/cotool-api/llms.txt) - [OpenAPI document](https://skmtc.dev/cotool/apis/cotool-api/revisions/f5abe0add203?raw)