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Cursor reads a project’s MCP servers from .cursor/mcp.json. The server itself is described in MCP server.

Add the server and sign in

  1. Create .cursor/mcp.json in the project, or add the partfinder entry to the one you have:
    To use PartFinder in every project, put the same entry in ~/.cursor/mcp.json instead.
  2. When Cursor opens the PartFinder sign-in page, sign in, choose your organization and approve the two permissions.

Check the connection

Ask the agent “Is PartFinder connected?”. It calls the ping tool, which is free.

Can I use my own API key?

Yes. The file can refer to an environment variable, so it holds no key.
  1. Set PARTFINDER_API_KEY in your environment to your API key.
  2. Use this entry instead: