Chinese Text Project vs Words

Chinese Text Project's JSON API resolves opaque CTP URNs into full text, titles, and subsection metadata across its library of pre-Qin and Han-era classical Chinese works, and underpins the site's own browser plugins for text lookup and annotation. Anonymous requests work without any key but are rate-limited; logged-in accounts get a higher ceiling, and academic institutions can arrange a subscription that issues API keys for extended, programmatic access.

WordsAPI is a RapidAPI-hosted REST dictionary/thesaurus returning JSON definitions, synonyms, antonyms, rhymes, pronunciations, and word-frequency data across more than 150,000 English words — its own docs still show code samples calling the deprecated `wordsapiv1.p.mashape.com` host with an `X-Mashape-Key` header, but that legacy domain now refuses every request and a current RapidAPI key against the live `.p.rapidapi.com` proxy is required instead. A live unauthenticated request against that real proxy host returned a reflected `access-control-allow-origin` header plus `access-control-allow-credentials: true`, confirming CORS; its free tier covers 2,500 requests/day before paid plans starting at $10/month raise the ceiling to 25,000+/day.