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OpenTopoData

Science Data No key

AuthenticationNo key
Rate limitFree public API has modest fair-use caps; self-host for unlimited use.

Documentation: www.opentopodata.org ยท Checked Sep 13, 2026

About

OpenTopoData is a free, open-source elevation API and a drop-in alternative to Google's elevation service. Give it latitude and longitude coordinates and it returns the ground height from public datasets like SRTM and NASA's ASTER. The public API is free with no key, and you can self-host it for unlimited use.

Details

No key needed. You can call it right away.

Auth: No key

Rate limit: Free public API has modest fair-use caps; self-host for unlimited use.

Verified: 2026-09-13

Best for: personal developer fun

Read the docs Back to catalog

Setup

  1. Paste the example URL into your browser to get an elevation instantly, no signup needed.
  2. Replace the coordinates with your own latitude,longitude pair (up to 100 per request).
  3. Choose a dataset in the URL path, like srtm30m, etopo1, or eudem.
  4. For heavy use, follow the server docs to run your own copy with Docker.
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