scholarly-metadata
dblp (CS bibliography)
The curated computer-science bibliography, indexing around seven million publications from CS journals and conferences with carefully maintained author records. Search it on dblp.org or through its free API. Its scope is strictly computer science, but within that field it is often the cleanest, most reliable record of who published what, where, and when.
Academic papers API
Why it’s useful & how it works
No key, JSON/XML/BibTeX. CS-only scope. HTML is slow but the API is fast and works both ways.
What’s inside
~7M+ publications.
API access
https://dblp.org/search/publ/api?q=...&format=json ; SPARQL https://sparql.dblp.org/sparql
Access
Programmatic API access (a key may be required — see the API tag).