claude-api skill (Anthropic)
Development skillsReference for building on the Claude API and SDKs
- Stars
- ★ 182k
- Licence
- Apache-2.0
- Updated
- Agent skill
- Official

Guidance for building good MCP servers
From GitHub, fetched 19 Oct 2026. Stars are for the whole anthropics/skills repository; the last-update date is for this skill's folder.
Anthropic's skill for designing and implementing MCP servers in Python or TypeScript, including tool design and evaluation.
| Runs as | Skill |
|---|---|
| Type | Agent skill |
| Maintained by | Official |
Sources: github.com/anthropics/skills/tree/main/skills/mcp-builder, checked 19 Oct 2026. “Runs as” is from this listing. Blank means we haven't found it in official docs yet, not that it's unsupported.
Reference for building on the Claude API and SDKs
A skill for writing and testing new skills
Test local web apps with Playwright scripts