Archive.org vs Wikidata

The Internet Archive's Advanced Search and Metadata APIs let you query and pull structured records for its 99+ million digitized books, web captures, audio, video, and software items. Reads are keyless for both the search endpoint (archive.org/advancedsearch.php) and per-item metadata (archive.org/metadata/{identifier}), returning JSON, XML, or CSV depending on the requested output format.

Wikidata's action API exposes the structured, multilingual knowledge base behind Wikipedia's infoboxes — entity search, full item/property retrieval, and SPARQL-style queries over billions of statements. All read operations (wbsearchentities, wbgetentities, wbgetclaims, and friends) are keyless; OAuth only comes into play for authenticated edits/writes, which this directory entry isn't about. CORS is opt-in per request via the documented `origin=*` query parameter, which returns a wildcard Access-Control-Allow-Origin.