Solar System OpenData API alternatives

Data and facts on solar system bodies and planets. If it doesn't fit your project, here are the 10 best free Science & Math APIs to use instead in 2026, out of 58 in the directory.

For reference, Solar System OpenData API: No API key needed · Callable from the browser (CORS) · HTTPS.

1. 1

   GBIF API

   Online · 115 ms

   Global Biodiversity Information Facility. A free science & math API by gbif.org.

   • No API key needed
   • Fast: 115 ms response
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   Macrostrat API

   Online · 694 ms

   Geologic maps, rock columns and stratigraphy data.

   • No API key needed
   • Returns JSON at its URL
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   Chempirical API

   Online · 533 ms

   Chemical compounds with physical data, reactions and substructure search.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   CycleCalcs API

   Online · 714 ms

   Interpreted astronomy: sun and moon times, moon phases, planets, eclipses, seasons.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5

   Europe PMC API

   Online · 118 ms

   Life-science literature search with abstracts, citations and full-text links.

   • No API key needed
   • Fast: 118 ms response
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
6. 6

   iNaturalist API

   Online · 1121 ms

   Citizen-science wildlife observations with species identification and mapping.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
7. 7

   Launch Library 2 API

   Online · 876 ms

   Spaceflight launches and events database.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
8. 8

   MathJS API

   Online · 934 ms

   Evaluate math expressions via GET or POST as JSON.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
9. 9

   Oliver's mTOR Atlas API

   Online · 739 ms

   Curated mTOR research: studies by evidence type, pathway claims, open questions.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
10. 10

    OpenAlex API

    Online · 864 ms

    Open catalog of scholarly works, authors, institutions, sources, and concepts.

    • No API key needed
    • Callable from the browser (CORS)
    • HTTPS

    No authHTTPSCORS

Solar System OpenData API vs alternatives

Solar System OpenData API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
Solar System OpenData	No	Yes	Yes	Up	500 ms	Not rated
GBIF	No	Yes	Yes	Up	115 ms	Not rated
Macrostrat	No	Yes	Yes	Up	694 ms	Not rated
Chempirical	No	Yes	Yes	Up	533 ms	Not rated
CycleCalcs	No	Yes	Yes	Up	714 ms	Not rated
Europe PMC	No	Yes	Yes	Up	118 ms	Not rated
iNaturalist	No	Yes	Yes	Up	1121 ms	Not rated
Launch Library 2	No	Yes	Yes	Up	876 ms	Not rated
MathJS	No	Yes	Yes	Up	934 ms	Not rated

See also: best Science & Math APIs · all Science & Math APIs