The Nominatim API is a web service for searching OpenStreetMap (OSM) objects based on their name or type. It provides various endpoints for searching, reverse geocoding, address lookup, and server status inquiries, catering to different needs of developers and users.
Build a quick place-search box for a website, reverse-geocode GPS from a mobile app, or add address lookup to delivery tools — all using OpenStreetMap data. You can call the public Nominatim server for light use, or run your own Nominatim instance for higher volumes. The public server is free but has strict rate and usage rules, so self-hosting is the path for production/bulk workloads. Returns are available in JSON, GeoJSON and other formats and require proper ODbL attribution if you reuse the data.
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