Dictionary API

English definitions, example sentences and synonyms for about 147,000 words and phrases, with senses ordered from most to least common.

Quick start

curl "https://dictionary.quiply.net/v1/define?word=happy" \
  -H "X-API-Key: YOUR_KEY"

Authentication

Every request must include your key in the X-API-Key header. You get your key instantly on the pricing section. Keep it secret — don't put it in public front-end code.

Base URL: https://dictionary.quiply.net

GET/v1/define

Definitions grouped by part of speech.

Parameter	Type	Description
`word` required	string	A word or phrase, e.g. `run` or `ice cream`
`pos`	string	Optional: `noun`, `verb`, `adjective` or `adverb`

{
  "word": "happy",
  "meanings": [ {
    "part_of_speech": "adjective",
    "senses": [ { "definition": "enjoying or showing or marked by joy or pleasure",
                   "example": "a happy smile", "synonyms": ["glad"] } ]
  } ]
}

GET/v1/synonyms

Synonyms grouped by part of speech, most common senses first.

Parameter	Type	Description
`word` required	string	A word or phrase, e.g. `run` or `ice cream`
`pos`	string	Optional: `noun`, `verb`, `adjective` or `adverb`

GET/v1/search

Autocomplete: words starting with q (optional limit 1–100, default 25).

GET/v1/health

Service status and dataset size. No key needed.

Lookups match the exact word form (for example run, not running). Data is based on Princeton University's WordNet (WordNet 3.0), © Princeton University, used under the WordNet license.

Errors

Status	Meaning
401	Missing or invalid `X-API-Key`
403	Subscription inactive (cancelled or payment failed)
404	Word not found
422	Bad or missing parameter
429	Quota reached for your plan

Pricing

Free trial: 5 requests/day. All APIs plan: $9.95/month gives you every Quiply API, 250,000 requests a month.

Get your API key