curl -X POST 'https://api.anthropic.com/v1/skills/skill-id/versions' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01' \
  -F 'files=@sample.bin'

# POST /v1/skills/{skill_id}/versions (Claude API)
Base URL: https://api.anthropic.com
Auth: x-api-key; Anthropic API key; required.
Request formats: multipart/form-data.
Last verified: 2026-10-20

> Create Skill Version

## Critical Gotchas
* Authentication uses the `x-api-key` header and requests also require an `anthropic-version` header.
* The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

## cURL
curl -X POST 'https://api.anthropic.com/v1/skills/skill-id/versions' \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H 'anthropic-version: 2023-06-01' \
  -F 'files=@sample.bin'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| skill_id | path | string | Yes | Unique identifier for the skill.  The format and length of IDs may change ove... |
| files | body | string[] | Yes | Files to upload for the skill.  All files must be in the same top-level direc... |

## Response example
{"created_at":"2026-09-03T00:00:00Z","description":"string"}

---
Need an API key? Get one at https://console.anthropic.com/settings/keys

POST

POST /v1/skills/{skill_id}/versions — Claude API

Anthropic API key (required); https://api.anthropic.com

Claude API

Create Skill Version

Base URL: https://api.anthropic.com
Auth: x-api-key: <ANTHROPIC_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 214 tokens · Vary: Accept

Critical gotchas

Authentication uses the x-api-key header and requests also require an anthropic-version header.

The official OpenAPI URL is discovered from the SDK repository manifest and must remain under Anthropic's trusted Stainless storage prefix.

cURL

curl -X POST 'https://api.anthropic.com/v1/skills/skill-id/versions' \  -H "x-api-key: $ANTHROPIC_API_KEY" \  -H 'anthropic-version: 2023-06-01' \  -F '[email protected]'

Parameters

Name	In	Type	Required	Description
skill_id	path	string	Yes	Unique identifier for the skill. The format and length of IDs may change over time.
files	body	string[]	Yes	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.

Response 200 OK

{
  "created_at": "2026-09-03T00:00:00Z",
  "description": "string",
  "id": "string",
  "name": "string",
  "skill_id": "string",
  "type": "skill_version"
}

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