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claude api — Agent Skill

by anthropics · Updated

Claude API and SDK documentation skill for building LLM-powered applications

At a glance

claude-api is an Agent Skill by anthropics in the Documents & Office category. It bundles 1 skill. In Claude Code it installs with `/plugin install claude-api@anthropic-agent-skills` after adding the anthropics/skills marketplace; other assistants use its SKILL.md instructions as rules. Its source repository has 184,396 GitHub stars (as of Oct 27, 2026).

Included skills

claude-api
Source 184kGitHub stars

How to install claude api in your AI client

Setup for Claude Code, Claude Desktop, Cursor, Codex, Windsurf, Cline and VS Code — copy-paste ready.

How to install claude api in Claude CodeAnthropic's agentic CLI

  1. Add the marketplace

    claude
    /plugin marketplace add anthropics/skills

  2. Install the skill

    claude
    /plugin install claude-api@anthropic-agent-skills

  3. Use it

    These are slash commands for a Claude Code session, not your shell. Claude auto-invokes the skill when your request matches its description — or type its slash command if it exposes one.

Documentation

Full README

Note: This repository contains Anthropic's implementation of skills for Claude. For information about the Agent Skills standard, see agentskills.io.

Skills

Skills are folders of instructions, scripts, and resources that Claude loads dynamically to improve performance on specialized tasks. Skills teach Claude how to complete specific tasks in a repeatable way, whether that's creating documents with your company's brand guidelines, analyzing data using your organization's specific workflows, or automating personal tasks.

For more information, check out:

About This Repository

This repository contains skills that demonstrate what's possible with Claude's skills system. These skills range from creative applications (art, music, design) to technical tasks (testing web apps, MCP server generation) to enterprise workflows (communications, branding, etc.).

Each skill is self-contained in its own folder with a SKILL.md file containing the instructions and metadata that Claude uses. Browse through these skills to get inspiration for your own skills or to understand different patterns and approaches.

Many skills in this repo are open source (Apache 2.0). We've also included the document creation & editing skills that power Claude's document capabilities under the hood in the `skills/docx`, `skills/pdf`, `skills/pptx`, and `skills/xlsx` subfolders. These are source-available, not open source, but we wanted to share these with developers as a reference for more complex skills that are actively used in a production AI application.

Disclaimer

These skills are provided for demonstration and educational purposes only. While some of these capabilities may be available in Claude, the implementations and behaviors you receive from Claude may differ from what is shown in these skills. These skills are meant to illustrate patterns and possibilities. Always test skills thoroughly in your own environment before relying on them for critical tasks.

Skill Sets

  • ./skills: Skill examples for Creative & Design, Development & Technical, Enterprise & Communication, and Document Skills
  • ./spec: The Agent Skills specification
  • ./template: Skill template

Try in Claude Code, Claude.ai, and the API

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