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chuk-mcp-geocoder

An MCP server providing geocoding and place discovery services via Nominatim and OpenStreetMap. It e...

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Updated Feb 12, 2026
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An MCP server providing geocoding and place discovery services via Nominatim and OpenStreetMap. It enables users to perform forward and reverse geocoding, extract bounding boxes, and find nearby places or administrative hierarchies.
  1. Click the "Install Now" button to open the FastMCP connection / environment configuration interface.

  2. In the FastMCP interface, add the following environment variables (each as a separate key/value entry):

    1. NOMINATIM_EMAIL — your contact email (required by Nominatim when using the public instance).
      • Example value: you@example.com
      • Notes: supply a real email address you monitor so operators can contact you if your usage causes issues. This is not an API key — it’s an identifier for polite usage.
    2. NOMINATIM_BASE_URL — URL of the Nominatim instance to use (optional, defaults to the public Nominatim).
    3. MCP_STDIO — (optional) force STDIO transport mode.
      • Value: true or false (leave blank to auto-detect).
      • Use true if your MCP client requires STDIO rather than HTTP.
  3. Save the FastMCP environment entries (click Save / Apply in the FastMCP interface).

  4. Use the same FastMCP connection modal to start or install the server (press the Install / Start / Connect button provided there).

  5. Verify the configuration by running a quick geocoding call from your MCP client (for example: ask the server to geocode "New York" or call the geocode tool). If you see valid lat/lon results the ENVs are working.

  6. If you intend heavy or production use, consider providing a private/self-hosted Nominatim URL (set NOMINATIM_BASE_URL to that URL) or contact the Nominatim operators for usage guidance; otherwise the public instance at https://nominatim.openstreetmap.org can be used with the NOMINATIM_EMAIL set.

Notes:

  • No API key is required to use the public server; only NOMINATIM_EMAIL (contact email) is relevant for polite usage.
  • All values must be entered into the FastMCP connection interface fields before starting the MCP server.

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