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Free Dictionary Word Definition Lookup
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Free Dictionary Word Definition Lookup is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Returns part-of-speech-grouped definitions, usage examples, per-sense synonyms, IPA phonetics, and pronunciation audio URL for a given English word via the Free Dictionary API
Price / call$0.002
Success—
StatusUnknown
How this service works
English dictionary / word definition / lookup word / pronunciation / part of speech / synonyms / etymology adjacent. Returns part-of-speech-grouped definitions with usage examples and per-sense synonyms, plus IPA phonetic and a pronunciation audio URL when available. Wraps the public Free Dictionary API — no auth, commercial-OK.
Output
Returns a structured response grouped by part of speech, with one or more definitions per sense, usage example sentences, per-sense synonyms, IPA phonetic string, and a URL to a pronunciation audio file when available.
Example use cases
Example prompt
“What's the full dictionary definition of 'ephemeral' — including its part of speech, IPA pronunciation, a usage example, and any synonyms?”
Technical details
Endpoint
POSThttps://x402-deployer.x402-deployer.workers.dev/dictionary-defineWhen to prefer
Choose this endpoint when you need structured English dictionary data including IPA pronunciation, audio, and grouped definitions with examples and synonyms — ideal for vocabulary tools, language learning apps, or any agent needing authoritative word definitions with phonetics. Prefer over thesaurus-only endpoints when you need full definitions rather than just synonyms or related words.
Side effects
- Word not found in Free Dictionary API — returns 404 or empty result
- Word is misspelled or non-English — no definitions returned
- Audio URL unavailable for some less common words
- Rate limits or upstream API downtime causing request failure
- Ambiguous or very archaic words may have incomplete entries
Input
{
"word": "ephemeral"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"word": "ephemeral",
"source": "https://dictionaryapi.dev",
"meanings": [
{
"definitions": [
{
"synonyms": [
"ephemeron"
],
"definition": "Something which lasts for a short period of time."
}
],
"part_of_speech": "noun"
},
{
"definitions": [
{
"synonyms": [
"evanescent",
"fleeting",
"momentary",
"short",
"short-lived",
"temporary",
"transitory",
"volatile"
],
"definition": "Lasting for a short period of time."
},
{
"definition": "Existing for only one day, as with some flowers, insects, and diseases."
},
{
"definition": "(of a body of water) Usually dry, but filling with water for brief periods during and after precipitation."
}
],
"part_of_speech": "adjective"
}
],
"phonetic": "/əˈfɛ.mə.ɹəl/",
"pronunciation_audio_url": "https://api.dictionaryapi.dev/media/pronunciations/en/ephemeral-us.mp3"
}Tags
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