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English Dictionary API
Definitions, synonyms, usage examples, audio pronunciations and etymology for English words — in one call.
https://api.endpointry.com/v1/google/dictionaryReturns the dictionary entry for an English word: syllabification, phonetic pronunciations with audio, etymology, and one entry per part of speech with its inflections, numbered senses, synonyms and usage examples. Returns `404 NOT_FOUND` when the word has no entry. Definitions are stable, so responses are cached for 24 hours.
| word* | string |
| syllables* | string | nullThe word split into syllables, when the source provides it. |
| etymology* | string | nullWord origin, when available. |
| pronunciations* | array<object> |
| text* | string |
| notation* | string | nullThe transcription system used, when the source states one. |
| audio_url* | string · uri | nullSpoken pronunciation, when available. |
| entries* | array<object>One entry per part of speech, in the order the source ranks them. |
| part_of_speech* | string |
| inflections* | array<object> |
| label* | string |
| text* | string |
| definitions* | array<object> |
| text* | string |
| synonyms* | array<string> |
| examples* | array<string> |
Platform fields, identical on every endpoint — what they mean.
curl "https://api.endpointry.com/v1/google/dictionary?word=serendipity" \
-H "Authorization: Bearer sk_live_..."{
"meta": {
"request_id": "req_7729f93d3facf68ff83e5c50",
"as_of": "2026-07-31T12:00:00.000Z",
"cache": "MISS"
},
"data": {
"word": "serendipity",
"syllables": "ser·en·dip·i·ty",
"etymology": "1750s: coined by Horace Walpole, suggested by The Three Princes of Serendip, the title of a fairy tale in which the heroes 'were always making discoveries, by accidents and sagacity, of things they were not in quest of'.",
"pronunciations": [
{
"text": "/ˌserənˈdipədē/",
"notation": "IPA",
"audio_url": "https://ssl.gstatic.com/dictionary/static/sounds/oxford/serendipity--_us_1.mp3"
}
],
"entries": [
{
"part_of_speech": "noun",
"inflections": [
{
"label": "plural",
"text": "serendipities"
}
],
"definitions": [
{
"text": "the occurrence and development of events by chance in a happy or beneficial way.",
"synonyms": [
"chance",
"happy chance",
"accident",
"fluke"
],
"examples": [
"a fortunate stroke of serendipity"
]
}
]
}
]
}
}What teams build with it
- Vocabulary and language-learning apps with audio pronunciation
- Writing tools: definitions and synonyms inline
- Word games and puzzles with authoritative validation
- Reading assistants — one lookup returns the full entry
Frequently asked questions
Which languages are supported?
English (en-US) today. Every entry includes syllabification, pronunciations and one entry per part of speech.
What happens for a word with no entry?
A clean 404 NOT_FOUND rather than an empty result, so misspellings and made-up words are easy to distinguish from real ones.
What format is the pronunciation audio?
MP3 URLs, ready to play in a browser or app, alongside the phonetic transcription.
How current is the data?
Definitions are stable, so responses are cached for 24 hours and meta.as_of carries the read time.
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