Anthropic's Model Context Protocol shipped without two things developers immediately wanted: a registry, and a tool to wire a server into a client without hand-editing JSON. This post is about the second one — specifically the mcpr install command we shipped in @incultnitollc/mcpr@0.2.0, what it actually does, and the bugs we hit building it.

If you've never integrated an MCP server, the current flow is:

Find the server on GitHub.

Read the README for its launch command.

Copy a JSON fragment.