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NASA Common Metadata Repository (CMR) Search API

Freeauth: none (search); Earthdata Login may be required for some data downloadsCC0-1.0#osint#earth-observation#satellite#metadata#api✓ verified Nov 9, 2026

NASA Common Metadata Repository (CMR) Search API

NASA's Common Metadata Repository (CMR) Search API serves metadata for Earth-science collections and granules (satellite, climate, ocean) as a keyless API, queryable by time, place and keyword. Responses are available in formats including ATOM, CSV, JSON, UMM JSON, KML, STAC and XML.

Required Attribution:

Not required under CC0 for NASA-led mission data; non-NASA data may carry its own sponsor's attribution terms.

Coverage

Collection and granule metadata across NASA-led and partner missions: search by concept id, DOI, provider, temporal range, spatial area, platform, instrument, processing level and more, with paging and scroll support for large result sets. Signal Lab's note: Earthdata Login may be required for some data downloads, though metadata search itself needs no key. Update cadence: Not stated.

Verdict

Search NASA Earthdata's catalog of Earth-science collections and granules (satellite, climate, ocean) by time, place and keyword, keyless, in JSON/XML/STAC and more. Licensed CC0-1.0 for NASA-led mission data unless marked otherwise: "Unless the content is marked with a use restriction or license, data provided from a NASA-led mission are licensed as Creative Commons Zero (CC0)." WARNING: non-NASA data in the catalog follows its own sponsor's terms: "Non-NASA data available through the ESDIS project is subject to the license arrangements of the sponsoring organization." Signal Lab's note: Earthdata Login may be required for some data downloads (not for metadata search). Rate limits: Not stated on the checked pages. Signal Lab links only.

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