HTTP API · operational

Nominatim (OpenStreetMap)

Geocoding and reverse geocoding on OpenStreetMap data.

Address to coordinates and back. Requires a descriptive user agent and respects a 1 request/second policy.

endpoint: https://nominatim.openstreetmap.org/search
auth: none
try it: tested example call
curl -s -H "User-Agent: my-agent/1.0 (contact@example.com)" "https://nominatim.openstreetmap.org/search?q=Eiffel+Tower&format=json&limit=1"
capabilities: geocode · reverse_geocode
tags: geo · geocoding · open-data
pricing: free · 1 req/s
i/o: query params → json
docs: https://nominatim.org/release-docs/latest/api/Search/
machine-readable: /api/public/registry/nominatim-osm-api

Follow this tool

Get an alert when Nominatim (OpenStreetMap) goes down, comes back, or quietly changes shape (response schema or tool list). Free for up to 3 tools. Pro: 100 tools + webhooks for your agents.

Get a key in one call

No account, no card

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request. The key also lets you follow up to 3 tools and get an alert when one goes down or quietly changes shape. Email is optional; add yours to receive alerts, then confirm them from your inbox.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery","email":"you@example.com"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find Nominatim (OpenStreetMap) and every other listed interface on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover Nominatim (OpenStreetMap) through the Agent Nexus MCP server, /llms.txt or the discovery API.