fastmcp/examples/skills

MCP Skills

This example serves skills from sample_skills/ using the MCP Skills extension and reads them from a FastMCP client with manifest verification.

Run the server:

uv run python examples/skills/server.py

Or run the in-memory client example:

uv run python examples/skills/client.py

Skill is the storage-neutral authoring object. Use Skill.from_directory() for one disk snapshot, or SkillsDirectoryProvider to load a whole directory tree. SkillsDirectoryProvider.reload() replaces its snapshot explicitly. Servers opt into the Skills methods with mcp.add_extension(SkillsExtension()).

Clients use list_skills() and get_skill(uri). A RemoteSkill reads files by relative path and checks each response against the server's manifest before returning its bytes. The protocol only distributes content; host applications decide whether and how to trust or activate it.