claude

Unofficial MCP Builder

Author and maintain unofficial MCP servers for third-party APIs that don't ship one. Generate a server from the vendor's API docs verified against the live API with your own key, detect upstream drift on a schedule, and smoke-test against real operations. Bound by a committed api-surface.yaml recording what the API actually does versus what its docs claim. Publishes to npm.

31 on GitHubby Daniel Rosehillv1.0.0MITupdated yesterdayRepo Scaffolding & Retrofitting
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Plugin unofficial-mcp-builder from marketplace danielrosehill in danielrosehill/Claude-Code-Plugins. Commands read from the repo's manifest — today.

What it installs

Skills (3)

  • create-mcp-from-api-docs

    Build an unofficial MCP server for a third-party API that doesn't ship one, starting from the vendor's API documentation and (optionally) a working API key used to verify the real surface before any code is written. Produces a publishable npm package plus a committed api-surface.yaml recording what

  • revalidate-api-surface

    Periodic drift check for an unofficial MCP server — re-fetch the vendor's current API documentation, diff it against the committed api-surface.yaml, and update the server for anything that changed upstream. Catches new endpoints, renamed or removed fields, changed defaults, deprecations, and auth ch

  • smoke-test-mcp

    Exercise an unofficial MCP server end-to-end against the live third-party API using the user's own key — connect, list tools, run real read operations unattended and write operations with per-operation confirmation, then fix whatever breaks. Proactive debugging: finds the schema mismatches, paginati

View source on GitHub blog.danielrosehill.com

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