0n3
MCP servers · Nominatim (OpenStreetMap search) · connector

Connect Claude (desktop & claude.ai) to Nominatim (OpenStreetMap search)

One line gives Claude (desktop & claude.ai) 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 Claude (desktop & claude.ai)'s access alone any time.

Get the line for Claude (desktop & claude.ai)Connect Nominatim (OpenStreetMap search) first

Three steps

  1. Create a free 0n3 account and connect Nominatim (OpenStreetMap search). Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Claude (desktop & claude.ai). The Claude app or claude.ai. Add 0n3 in Settings and sign in once.
  3. Ask Claude (desktop & claude.ai): whoami. Then: "List customers in Nominatim (OpenStreetMap search)".
Claude desktop app and claude.ai
  1. In Claude, open Settings. Click Connectors. Click Add custom connector.
  2. For the name, type 0n3. For the URL, type https://0n3.app/mcp
  3. Click Connect. Sign in with your 0n3 email and password.
  4. Start a new chat. Turn on 0n3 in the tools menu. Type: "whoami"

You don't need to paste a key. You can turn this off any time in 0n3 under Tokens.

The line above carries a placeholder; 0n3.app/install mints a real key named for Claude (desktop & claude.ai) and fills it in.

What Claude (desktop & claude.ai) 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
SearchGET /search
ReverseGET /reverse
LookupGET /lookup
StatusGET /status

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Claude (desktop & claude.ai) with other apps

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