Geocoding — entry 058 of 80
Open Topo Data
Open Topo Data is an open-source, self-hostable REST server for elevation lookups, distributed as a Docker image with support for ASTER, SRTM, EU-DEM, ETOPO1, NED, NZ DEM, and several bathymetry datasets. Its free public API (api.opentopodata.org) needs no key and returns elevation in meters for one or more lat/lng points as plain JSON; a live probe against it confirms no CORS header, matching the existing record. There's no vendor pricing tier for the hosted API itself — paid options only cover optional commercial support for self-hosting.
AuthenticationNone requiredCall it straight away — no key, no signup.
HTTPSSupportedTraffic is encrypted in transit.
CORSDisabledBrowser calls need a server-side proxy.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score74
Authentication25/25No authentication required
Pricing20/20Free to use
Docs0/20No docs or spec available
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/open-topo-data/"><img src="https://greatapis.com/badge/open-topo-data.svg" alt="Scored 74 on greatapis.com"></a>Auth quickstart
- No key needed — call it now.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.