API archive entry · source-reported
Numbers
Number of the day, random number, number facts and anything else you want to do with numbers
Other Science & Math APIs
These records share a directory category and are ordered by similarity of reported access facts. They are a shortlist, not proof of drop-in compatibility.
Materials Platform for Data Science
Curated experimental data for materials science
API key · HTTPS reported · CORS No
CORE
Access the world's Open Access research papers
API key · HTTPS reported · CORS Unknown
NASA InSight
Mars weather data from InSight lander
API key · HTTPS reported · CORS Yes
OrbitalWiki
Catalog of 16,000+ satellites merging CelesTrak, GCAT, Wikidata; free tier included
API key · HTTPS reported · CORS Yes
VedIntel™ AstroAPI
Vedic astrology computation — birth charts, dashas, panchang, AI narratives
API key · HTTPS reported · CORS Yes
ISRO
ISRO Space Crafts Information
No auth · HTTPS reported · CORS No
How to compare them
Coverage
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Operating cost
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Integration risk
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Data rights
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Source reference
This page separates source-reported facts from questions that need live provider verification.