Chinese Text Project vs Lingua Robot

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.

Lingua Robot is a RapidAPI-hosted REST dictionary covering more than 800,000 English lexical entries — words, phrasal verbs, and multiword expressions — with definitions, pronunciations, and morpheme/lemma data returned as JSON, documented on a separate Apiary reference site rather than its own marketing homepage. A live unauthenticated request against its real RapidAPI proxy host returned a reflected `access-control-allow-origin` header plus `access-control-allow-credentials: true`, reconfirming CORS; its free Basic tier covers 2,500 requests/day (then $0.004 each), with paid Pro/Ultra/Mega plans ($10-$99/month) raising the daily ceiling.