
Access millions of museum specimens from organizations around the world.
iDigBio API is a free Science & Math API that requires no API key, is served over HTTPS and has unconfirmed CORS support.
Server-side code driving iDigBio's search functionality.
Details from github.com.

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The iDigBio API is provided by idigbio (github.com). Server-side code driving iDigBio's search functionality.
Yes. The iDigBio 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 iDigBio API requires no authentication, so you can start making requests without signing up.
CORS support for the iDigBio API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The iDigBio API is served over HTTPS, so it's safe to use in production.