ISRO
ISRO Space Crafts Information
Integrated Taxonomic Information System.
ITIS API is a free Science & Math API that requires no API key, is served over HTTPS and has unconfirmed CORS support.
The Integrated Taxonomic Information System (ITIS, www.itis.gov) partners with specialists from around the world to assemble scientific names and their taxonomic relationships and distributes that data openly through publicly available software. The ITIS mission is to communicate a comprehensive ta…
Details from itis.gov.

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ISRO Space Crafts Information
The ITIS API is provided by ITIS (itis.gov). The Integrated Taxonomic Information System (ITIS, www.itis.gov) partners with specialists from around the world to assemble scientific names and their taxonomic relationships and distributes that data openly through publicly available software. The ITIS mission is to communicate a comprehensive ta…
Yes. The ITIS API is listed in the Science & Math category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The ITIS API requires no authentication, so you can start making requests without signing up.
CORS support for the ITIS API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The ITIS API is served over HTTPS, so it's safe to use in production.