MCP servers · Nominatim (OpenStreetMap search) · MCP server
Connect Codex CLI to Nominatim (OpenStreetMap search)
One line gives Codex CLI your Nominatim (OpenStreetMap search) account as tools: 4 endpoints, geocode, more, called with your own connection. No key in the prompt, a receipt for every call, revoke Codex CLI's access alone any time.
Three steps
- Create a free 0n3 account and connect Nominatim (OpenStreetMap search). Paste a key or sign in; it lands in your vault, encrypted.
- Install 0n3 into Codex CLI. OpenAI's helper in your Terminal. Paste two lines.
- Ask Codex CLI: whoami. Then: "List customers in Nominatim (OpenStreetMap search)".
First, paste this in Terminal and press Enter
export ON3_TOKEN="<your 0n token>"
This tells your computer your 0n3 key.
The line above carries a placeholder; 0n3.app/install mints a real key named for Codex CLI and fills it in.
What Codex CLI can then do in Nominatim (OpenStreetMap search)
Geocode · Find a place by name, name the place at a coordinate, or look up OpenStreetMap ids0
Find a place by name, name the place at a coordinate, or look up OpenStreetMap ids
More · Everything else this app exposes.4
Search
GET /searchReverse
GET /reverseLookup
GET /lookupStatus
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