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Anthropic

Anthropic Skills API

Create and manage custom Agent Skills. Skills are filesystem-based directories of instructions, scripts, and resources that Claude loads on demand via progressive disclosure. Workspace-wide sharing. The Skills API is currently in beta and requires the skills-2025-10-02 beta header.

Documentation Provider Profile APIs.io OpenAPI GitHub

Anthropic Skills API is one of 24 APIs that Anthropic publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Agents, AI, Artificial Intelligence, and Skills. The published artifact set on APIs.io includes API documentation and an OpenAPI specification.

This API exposes 4 operations across 2 paths, and defines 5 schemas. It is described by OpenAPI 3.1.0, at version 1.0.0.

Requests are made against a single base URL, https://api.anthropic.com/v1.

4 operations 2 paths 5 schemas 1 DELETE2 GET1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.1.0
API Version
1.0.0
Server
https://api.anthropic.com/v1
Authentication
API Key
Contact
Anthropic
License
Anthropic API License
Resource Areas
1

Authentication & Security 1

Anthropic Skills API declares 1 security scheme for authenticating requests. An API key is passed in the header as x-api-key (AdminApiKeyAuth). By default, every request must be authenticated.

  • AdminApiKeyAuth — Your Admin API key for authentication (starts with sk-ant-admin...).

Paths & Operations 4

Across 2 paths, the API surfaces 4 operations — 1 DELETE, 2 GET, 1 POST. Each is listed below with its method, path, parameters, and response codes.

Skills 4

Create, list, retrieve, update, and delete Skills

POST
/v1/skills
Anthropic Create Skill
createSkill 2 params body → 2004XX
GET
/v1/skills
Anthropic List Skills
listSkills 5 params → 2004XX
GET
/v1/skills/{skill_id}
Anthropic Get Skill
getSkill 3 params → 2004XX
DELETE
/v1/skills/{skill_id}
Anthropic Delete Skill
deleteSkill 3 params → 2004XX

Schemas 5

The contract defines 5 schemas that model the data the API accepts and returns. The most detailed are Skill (7 properties), SkillList (4 properties), Error (2 properties), DeleteResponse (2 properties). Each schema is shown below with its type and property counts.

SkillList
object
4 properties
CreateSkillRequest
object
1 property 1 required
DeleteResponse
object
2 properties
Skill
object
7 properties
Error
object
2 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

anthropic-skills-api-openapi.yml Raw ↑

Other APIs Anthropic publishes across the network.

Anthropic Messages API
AE Profile APIs.io
Anthropic Models API
AE Profile APIs.io
Anthropic Message Batches API
AE Profile APIs.io
Anthropic Files API
AE Profile APIs.io
Anthropic Token Counting API
AE Profile APIs.io
Anthropic Claude Code Analytics API
AE Profile APIs.io
Anthropic Agents API
AE Profile APIs.io
Anthropic Api Keys API
AE Profile APIs.io
Anthropic Cost API
AE Profile APIs.io
Anthropic Environments API
AE Profile APIs.io
Anthropic Events API
AE Profile APIs.io
Anthropic Organization API
AE Profile APIs.io
#Agents#AI#Artificial Intelligence#Skills
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API Details
ID
anthropic:anthropic-skills-api
Server
https://api.anthropic.com/v1
Docs
https://docs.anthropic.com/en/api/skills/create-skill
Provider
Anthropic
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