Skills API documentation

Anthropic

September 13, 2026

Official guide to Claude Skills API for connecting external tools and actions.

Learn it now

About

Anthropic's official documentation for the Skills API, enabling developers to extend Claude's capabilities with custom skills and integrations. Covers skill definition, registration, and orchestration patterns for agentic applications. Part of Claude's official API reference suite.

Who is it for

Backend engineers and Claude API users building tool-connected applications. Ideal for those extending Claude with business logic, third-party service integrations, and action execution.

Why

Authoritative guidance directly from Anthropic on a core feature for agent-driven applications. Essential reference for implementing tool calling and skill composition patterns.

What you learn

How to define and register custom skills for Claude agents

Skill orchestration patterns and best practices for multi-step workflows

API contract and payload structures for skill invocation

Integration patterns with external services and business systems

Back to All Claude Courses

Schedule an intro call

Ready to accelerate your pipeline?

Reach out to discuss how we can help your GTM team scale with automation and expertise.