Reverse geocode coordinates to country, region and municipality with ISO 3166 codes.
AtlasFetch API is a free Geocoding API that requires apiKey authentication, is served over HTTPS and does not support CORS, so it should be called from a server.
Reference for the AtlasFetch API: reverse geocode a coordinate to its country, region and municipality with ISO 3166 codes, the nearest street and house number, match it against your own geofences, route around them, and geocode addresses. Machine-readable copy at /llms.txt.
Details from atlasfetch.xyz.

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The AtlasFetch API is provided by AtlasFetch (atlasfetch.xyz). Reference for the AtlasFetch API: reverse geocode a coordinate to its country, region and municipality with ISO 3166 codes, the nearest street and house number, match it against your own geofences, route around them, and geocode addresses. Machine-readable copy at /llms.txt.
Yes. The AtlasFetch API is listed in the Geocoding category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The AtlasFetch API uses apiKey authentication, so you need to register for credentials before making requests.
Not directly. The AtlasFetch API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.
Yes. The AtlasFetch API is served over HTTPS, so it's safe to use in production.