Connecting Cursor

Cursor connects with an API key. Create one under Settings → API & AI (see API keys and apps).

Steps

1. Open ~/.cursor/mcp.json (for all your projects) or .cursor/mcp.json in your project.
2. Add this:

{
  "mcpServers": {
    "eenfactuurmaken": {
      "url": "https://eenfactuurmaken.nl/mcp",
      "headers": { "Authorization": "Bearer efm_your_key" }
    }
  }
}

3. Go to Settings → MCP (or "Tools & Integrations") and turn on eenfactuurmaken. The tools appear.
4. Ask the agent, for example: "Create a draft invoice for customer Acme with 3 hours of consultancy at €95."

Not in git

Don't commit a .cursor/mcp.json that contains a key to git. Preferably use the global ~/.cursor/mcp.json.

Handy for developers

Building an integration with the REST API? The agent can use the MCP tools to create and check test data while you write the code. The prompt library has prompts for building integrations.