Free APIKnowledgeNo key
Free Dictionary API
Word definitions, phonetics, audio, synonyms and examples as JSON, no key
The Free Dictionary API (dictionaryapi.dev) returns the meaning of a word as structured JSON: definitions, part of speech, phonetic spelling, audio pronunciation links, example sentences, synonyms and antonyms. It needs no key and supports several languages. It is a community-run open project sourcing from Wiktionary.
Free tier
Free, no key (community-run, best-effort availability)Rate limits
Not published; community-hosted, so treat availability as best-effort and cache resultsAuth
No keyBase URL
https://api.dictionaryapi.devWhat you'd build with it
- Add inline word definitions and pronunciations to a writing tool
- Provide synonyms/antonyms for a vocabulary or language-learning agent
- Validate that a token is a real dictionary word
- Surface example sentences to ground a copywriting assistant
Key endpoints
- GET
/api/v2/entries/{lang}/{word}Definitions, phonetics, audio and examples for a word
Members
Members get the runnable recipe
Sign in free to copy the example request, see a sample response, and read the gotchas.
Tags
knowledgedictionarylanguagereferencenlp