Claude Platform Docs

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.

Headers
"anthropic-beta": optional array of AnthropicBeta

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

One of the following:
string
"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more
One of the following:
"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"
"user-profiles-2026-08-18"
"advisor-tool-2026-03-01"
"managed-agents-2026-04-01"
"cache-diagnosis-2026-04-07"
"dreaming-2026-04-21"
"thinking-token-count-2026-05-13"
"server-side-fallback-2026-06-01"
"server-side-fallback-2026-07-01"
"fallback-credit-2026-06-01"
"fallback-credit-2026-07-01"
"agent-memory-2026-07-22"
"mid-conversation-tool-changes-2026-07-01"
Body (form-data)
files: array of string

Files to upload for the skill.

All files must be in the same top-level directory and must include a SKILL.md file at the root of that directory.

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".

defaultskill_version
version: string

Version identifier for the skill.

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

Create Skill Version

curl https://api.anthropic.com/v1/skills/$SKILL_ID/versions \
    -H 'Content-Type: multipart/form-data' \
    -H 'anthropic-version: 2023-06-01' \
    -H 'anthropic-beta: skills-2025-10-02' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY" \
    -F files='["Example 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"
}
Returns Examples
{
  "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"
}