Open Topo Data
FreeLiveLast verified 24 Sept 2026
Point elevation and ocean-depth lookups from open datasets like SRTM, ASTER, and GEBCO.
Example request
curl -s 'https://api.opentopodata.org/v1/srtm90m?locations=39.7471,-104.9963'
Free tier, in plain English
Public instance is entirely free and keyless, limited to 1,000 calls a day to keep it sustainable.
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