iDigBio vs Newton

iDigBio is a keyless REST API exposing more than 150 million digitized natural-history specimen records — pressed plants, pinned insects, fossils, and more — contributed by U.S. museums and herbaria under an NSF-funded national digitization effort. Search and summary endpoints return Darwin Core fields (collector, locality, taxonomic name) as JSON, and the same backend powers iDigBio's public specimen-browsing portal.

Newton is a keyless calculator API deployed as a Vercel serverless function: the operation (simplify, factor, derive, integrate, and more) and expression are both encoded directly in the URL path, and it answers with a small JSON object containing the result. It's a solo open-source project (aunyks/newton-api) rather than a commercial service, so there's no pricing tier or rate limit to opt into.