# Versions

## Create Skill Version

**post** `/v1/skills/{skill_id}/versions`

Create Skill Version

### Path Parameters

- `skill_id: string`

  Unique identifier for the skill.

  The format and length of IDs may change over time.

### Header Parameters

- `"anthropic-beta": optional array of AnthropicBeta`

  Optional header to specify the beta version(s) you want to use.

  - `string`

  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 25 more`

    - `"message-batches-2024-09-24"`

    - `"prompt-caching-2024-07-31"`

    - `"computer-use-2024-10-22"`

    - `"computer-use-2025-01-24"`

    - `"pdfs-2024-09-25"`

    - `"token-counting-2024-11-01"`

    - `"token-efficient-tools-2025-02-19"`

    - `"output-128k-2025-02-19"`

    - `"files-api-2025-04-14"`

    - `"mcp-client-2025-04-04"`

    - `"mcp-client-2025-11-20"`

    - `"dev-full-thinking-2025-05-14"`

    - `"interleaved-thinking-2025-05-14"`

    - `"code-execution-2025-05-22"`

    - `"extended-cache-ttl-2025-04-11"`

    - `"context-1m-2025-08-07"`

    - `"context-management-2025-06-27"`

    - `"model-context-window-exceeded-2025-08-26"`

    - `"skills-2025-10-02"`

    - `"fast-mode-2026-02-01"`

    - `"output-300k-2026-03-24"`

    - `"user-profiles-2026-03-24"`

    - `"advisor-tool-2026-03-01"`

    - `"managed-agents-2026-04-01"`

    - `"cache-diagnosis-2026-04-07"`

    - `"thinking-token-count-2026-05-13"`

    - `"server-side-fallback-2026-06-01"`

    - `"fallback-credit-2026-06-01"`

### Returns

- `id: string`

  Unique identifier for the skill version.

  The format and length of IDs may change over time.

- `created_at: string`

  ISO 8601 timestamp of when the skill version was created.

- `description: string`

  Description of the skill version.

  This is extracted from the SKILL.md file in the skill upload.

- `directory: string`

  Directory name of the skill version.

  This is the top-level directory name that was extracted from the uploaded files.

- `name: string`

  Human-readable name of the skill version.

  This is extracted from the SKILL.md file in the skill upload.

- `skill_id: string`

  Identifier for the skill that this version belongs to.

- `type: string`

  Object type.

  For Skill Versions, this is always `"skill_version"`.

- `version: string`

  Version identifier for the skill.

  Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

### Example

```http
curl https://api.anthropic.com/v1/skills/$SKILL_ID/versions \
    -X POST \
    -H 'anthropic-version: 2023-06-01' \
    -H 'anthropic-beta: skills-2025-10-02' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY"
```

#### Response

```json
{
  "id": "skillver_01JAbcdefghijklmnopqrstuvw",
  "created_at": "2024-10-30T23:58:27.427722Z",
  "description": "A custom skill for doing something useful",
  "directory": "my-skill",
  "name": "my-skill",
  "skill_id": "skill_01JAbcdefghijklmnopqrstuvw",
  "type": "type",
  "version": "1759178010641129"
}
```

## List Skill Versions

**get** `/v1/skills/{skill_id}/versions`

List Skill Versions

### Path Parameters

- `skill_id: string`

  Unique identifier for the skill.

  The format and length of IDs may change over time.

### Query Parameters

- `limit: optional number`

  Number of items to return per page.

  Defaults to `20`. Ranges from `1` to `1000`.

- `page: optional string`

  Optionally set to the `next_page` token from the previous response.

### Header Parameters

- `"anthropic-beta": optional array of AnthropicBeta`

  Optional header to specify the beta version(s) you want to use.

  - `string`

  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 25 more`

    - `"message-batches-2024-09-24"`

    - `"prompt-caching-2024-07-31"`

    - `"computer-use-2024-10-22"`

    - `"computer-use-2025-01-24"`

    - `"pdfs-2024-09-25"`

    - `"token-counting-2024-11-01"`

    - `"token-efficient-tools-2025-02-19"`

    - `"output-128k-2025-02-19"`

    - `"files-api-2025-04-14"`

    - `"mcp-client-2025-04-04"`

    - `"mcp-client-2025-11-20"`

    - `"dev-full-thinking-2025-05-14"`

    - `"interleaved-thinking-2025-05-14"`

    - `"code-execution-2025-05-22"`

    - `"extended-cache-ttl-2025-04-11"`

    - `"context-1m-2025-08-07"`

    - `"context-management-2025-06-27"`

    - `"model-context-window-exceeded-2025-08-26"`

    - `"skills-2025-10-02"`

    - `"fast-mode-2026-02-01"`

    - `"output-300k-2026-03-24"`

    - `"user-profiles-2026-03-24"`

    - `"advisor-tool-2026-03-01"`

    - `"managed-agents-2026-04-01"`

    - `"cache-diagnosis-2026-04-07"`

    - `"thinking-token-count-2026-05-13"`

    - `"server-side-fallback-2026-06-01"`

    - `"fallback-credit-2026-06-01"`

### Returns

- `data: array of object { id, created_at, description, 5 more }`

  List of skill versions.

  - `id: string`

    Unique identifier for the skill version.

    The format and length of IDs may change over time.

  - `created_at: string`

    ISO 8601 timestamp of when the skill version was created.

  - `description: string`

    Description of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `directory: string`

    Directory name of the skill version.

    This is the top-level directory name that was extracted from the uploaded files.

  - `name: string`

    Human-readable name of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `skill_id: string`

    Identifier for the skill that this version belongs to.

  - `type: string`

    Object type.

    For Skill Versions, this is always `"skill_version"`.

  - `version: string`

    Version identifier for the skill.

    Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

- `has_more: boolean`

  Indicates if there are more results in the requested page direction.

- `next_page: string`

  Token to provide in as `page` in the subsequent request to retrieve the next page of data.

### Example

```http
curl https://api.anthropic.com/v1/skills/$SKILL_ID/versions \
    -H 'anthropic-version: 2023-06-01' \
    -H 'anthropic-beta: skills-2025-10-02' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY"
```

#### Response

```json
{
  "data": [
    {
      "id": "skillver_01JAbcdefghijklmnopqrstuvw",
      "created_at": "2024-10-30T23:58:27.427722Z",
      "description": "A custom skill for doing something useful",
      "directory": "my-skill",
      "name": "my-skill",
      "skill_id": "skill_01JAbcdefghijklmnopqrstuvw",
      "type": "type",
      "version": "1759178010641129"
    }
  ],
  "has_more": true,
  "next_page": "page_MjAyNS0wNS0xNFQwMDowMDowMFo="
}
```

## Download Skill Version Content

**get** `/v1/skills/{skill_id}/versions/{version}/content`

Download a skill version's content as a zip archive.

### Path Parameters

- `skill_id: string`

  Unique identifier for the skill.

  The format and length of IDs may change over time.

- `version: string`

  Version identifier for the skill.

  Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

### Header Parameters

- `"anthropic-beta": optional array of AnthropicBeta`

  Optional header to specify the beta version(s) you want to use.

  - `string`

  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 25 more`

    - `"message-batches-2024-09-24"`

    - `"prompt-caching-2024-07-31"`

    - `"computer-use-2024-10-22"`

    - `"computer-use-2025-01-24"`

    - `"pdfs-2024-09-25"`

    - `"token-counting-2024-11-01"`

    - `"token-efficient-tools-2025-02-19"`

    - `"output-128k-2025-02-19"`

    - `"files-api-2025-04-14"`

    - `"mcp-client-2025-04-04"`

    - `"mcp-client-2025-11-20"`

    - `"dev-full-thinking-2025-05-14"`

    - `"interleaved-thinking-2025-05-14"`

    - `"code-execution-2025-05-22"`

    - `"extended-cache-ttl-2025-04-11"`

    - `"context-1m-2025-08-07"`

    - `"context-management-2025-06-27"`

    - `"model-context-window-exceeded-2025-08-26"`

    - `"skills-2025-10-02"`

    - `"fast-mode-2026-02-01"`

    - `"output-300k-2026-03-24"`

    - `"user-profiles-2026-03-24"`

    - `"advisor-tool-2026-03-01"`

    - `"managed-agents-2026-04-01"`

    - `"cache-diagnosis-2026-04-07"`

    - `"thinking-token-count-2026-05-13"`

    - `"server-side-fallback-2026-06-01"`

    - `"fallback-credit-2026-06-01"`

### Example

```http
curl https://api.anthropic.com/v1/skills/$SKILL_ID/versions/$VERSION/content \
    -H 'anthropic-version: 2023-06-01' \
    -H 'anthropic-beta: skills-2025-10-02' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY"
```

## Get Skill Version

**get** `/v1/skills/{skill_id}/versions/{version}`

Get Skill Version

### Path Parameters

- `skill_id: string`

  Unique identifier for the skill.

  The format and length of IDs may change over time.

- `version: string`

  Version identifier for the skill.

  Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

### Header Parameters

- `"anthropic-beta": optional array of AnthropicBeta`

  Optional header to specify the beta version(s) you want to use.

  - `string`

  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 25 more`

    - `"message-batches-2024-09-24"`

    - `"prompt-caching-2024-07-31"`

    - `"computer-use-2024-10-22"`

    - `"computer-use-2025-01-24"`

    - `"pdfs-2024-09-25"`

    - `"token-counting-2024-11-01"`

    - `"token-efficient-tools-2025-02-19"`

    - `"output-128k-2025-02-19"`

    - `"files-api-2025-04-14"`

    - `"mcp-client-2025-04-04"`

    - `"mcp-client-2025-11-20"`

    - `"dev-full-thinking-2025-05-14"`

    - `"interleaved-thinking-2025-05-14"`

    - `"code-execution-2025-05-22"`

    - `"extended-cache-ttl-2025-04-11"`

    - `"context-1m-2025-08-07"`

    - `"context-management-2025-06-27"`

    - `"model-context-window-exceeded-2025-08-26"`

    - `"skills-2025-10-02"`

    - `"fast-mode-2026-02-01"`

    - `"output-300k-2026-03-24"`

    - `"user-profiles-2026-03-24"`

    - `"advisor-tool-2026-03-01"`

    - `"managed-agents-2026-04-01"`

    - `"cache-diagnosis-2026-04-07"`

    - `"thinking-token-count-2026-05-13"`

    - `"server-side-fallback-2026-06-01"`

    - `"fallback-credit-2026-06-01"`

### Returns

- `id: string`

  Unique identifier for the skill version.

  The format and length of IDs may change over time.

- `created_at: string`

  ISO 8601 timestamp of when the skill version was created.

- `description: string`

  Description of the skill version.

  This is extracted from the SKILL.md file in the skill upload.

- `directory: string`

  Directory name of the skill version.

  This is the top-level directory name that was extracted from the uploaded files.

- `name: string`

  Human-readable name of the skill version.

  This is extracted from the SKILL.md file in the skill upload.

- `skill_id: string`

  Identifier for the skill that this version belongs to.

- `type: string`

  Object type.

  For Skill Versions, this is always `"skill_version"`.

- `version: string`

  Version identifier for the skill.

  Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

### Example

```http
curl https://api.anthropic.com/v1/skills/$SKILL_ID/versions/$VERSION \
    -H 'anthropic-version: 2023-06-01' \
    -H 'anthropic-beta: skills-2025-10-02' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY"
```

#### Response

```json
{
  "id": "skillver_01JAbcdefghijklmnopqrstuvw",
  "created_at": "2024-10-30T23:58:27.427722Z",
  "description": "A custom skill for doing something useful",
  "directory": "my-skill",
  "name": "my-skill",
  "skill_id": "skill_01JAbcdefghijklmnopqrstuvw",
  "type": "type",
  "version": "1759178010641129"
}
```

## Delete Skill Version

**delete** `/v1/skills/{skill_id}/versions/{version}`

Delete Skill Version

### Path Parameters

- `skill_id: string`

  Unique identifier for the skill.

  The format and length of IDs may change over time.

- `version: string`

  Version identifier for the skill.

  Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

### Header Parameters

- `"anthropic-beta": optional array of AnthropicBeta`

  Optional header to specify the beta version(s) you want to use.

  - `string`

  - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 25 more`

    - `"message-batches-2024-09-24"`

    - `"prompt-caching-2024-07-31"`

    - `"computer-use-2024-10-22"`

    - `"computer-use-2025-01-24"`

    - `"pdfs-2024-09-25"`

    - `"token-counting-2024-11-01"`

    - `"token-efficient-tools-2025-02-19"`

    - `"output-128k-2025-02-19"`

    - `"files-api-2025-04-14"`

    - `"mcp-client-2025-04-04"`

    - `"mcp-client-2025-11-20"`

    - `"dev-full-thinking-2025-05-14"`

    - `"interleaved-thinking-2025-05-14"`

    - `"code-execution-2025-05-22"`

    - `"extended-cache-ttl-2025-04-11"`

    - `"context-1m-2025-08-07"`

    - `"context-management-2025-06-27"`

    - `"model-context-window-exceeded-2025-08-26"`

    - `"skills-2025-10-02"`

    - `"fast-mode-2026-02-01"`

    - `"output-300k-2026-03-24"`

    - `"user-profiles-2026-03-24"`

    - `"advisor-tool-2026-03-01"`

    - `"managed-agents-2026-04-01"`

    - `"cache-diagnosis-2026-04-07"`

    - `"thinking-token-count-2026-05-13"`

    - `"server-side-fallback-2026-06-01"`

    - `"fallback-credit-2026-06-01"`

### Returns

- `id: string`

  Version identifier for the skill.

  Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

- `type: string`

  Deleted object type.

  For Skill Versions, this is always `"skill_version_deleted"`.

### Example

```http
curl https://api.anthropic.com/v1/skills/$SKILL_ID/versions/$VERSION \
    -X DELETE \
    -H 'anthropic-version: 2023-06-01' \
    -H 'anthropic-beta: skills-2025-10-02' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY"
```

#### Response

```json
{
  "id": "1759178010641129",
  "type": "type"
}
```

## Domain Types

### Version Create Response

- `VersionCreateResponse object { id, created_at, description, 5 more }`

  - `id: string`

    Unique identifier for the skill version.

    The format and length of IDs may change over time.

  - `created_at: string`

    ISO 8601 timestamp of when the skill version was created.

  - `description: string`

    Description of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `directory: string`

    Directory name of the skill version.

    This is the top-level directory name that was extracted from the uploaded files.

  - `name: string`

    Human-readable name of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `skill_id: string`

    Identifier for the skill that this version belongs to.

  - `type: string`

    Object type.

    For Skill Versions, this is always `"skill_version"`.

  - `version: string`

    Version identifier for the skill.

    Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

### Version List Response

- `VersionListResponse object { id, created_at, description, 5 more }`

  - `id: string`

    Unique identifier for the skill version.

    The format and length of IDs may change over time.

  - `created_at: string`

    ISO 8601 timestamp of when the skill version was created.

  - `description: string`

    Description of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `directory: string`

    Directory name of the skill version.

    This is the top-level directory name that was extracted from the uploaded files.

  - `name: string`

    Human-readable name of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `skill_id: string`

    Identifier for the skill that this version belongs to.

  - `type: string`

    Object type.

    For Skill Versions, this is always `"skill_version"`.

  - `version: string`

    Version identifier for the skill.

    Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

### Version Retrieve Response

- `VersionRetrieveResponse object { id, created_at, description, 5 more }`

  - `id: string`

    Unique identifier for the skill version.

    The format and length of IDs may change over time.

  - `created_at: string`

    ISO 8601 timestamp of when the skill version was created.

  - `description: string`

    Description of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `directory: string`

    Directory name of the skill version.

    This is the top-level directory name that was extracted from the uploaded files.

  - `name: string`

    Human-readable name of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `skill_id: string`

    Identifier for the skill that this version belongs to.

  - `type: string`

    Object type.

    For Skill Versions, this is always `"skill_version"`.

  - `version: string`

    Version identifier for the skill.

    Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

### Version Delete Response

- `VersionDeleteResponse object { id, type }`

  - `id: string`

    Version identifier for the skill.

    Each version is identified by a Unix epoch timestamp (e.g., "1759178010641129").

  - `type: string`

    Deleted object type.

    For Skill Versions, this is always `"skill_version_deleted"`.