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Dictionaries & Language Data
Definitions, thesauri, grammar and language resources.
JSON: /api/v1/directory.json (filter on category=dictionaries-language)
Free Dictionary API
Free English dictionary API.
FreeNo authMerriam-Webster API
Dictionary and thesaurus API.
Free tierAPI keyWordsAPI
Word data API.
Free tierAPI keyWiktionary REST API
Dictionary entries.
FreeNo authOxford Dictionaries API
Dictionary data.
PaidAPI keyWordNet
Lexical database.
FreeNo authLanguageTool API
Grammar checking API.
Free tierNo authUrban Dictionary Unofficial API
Slang definitions endpoint.
FreeNo authLingua
Language detection library.
FreeNo authGlot
Catalog of world languages.
FreeNo auth