Wordnik API
by developer.wordnik.com
Language and text
Added on November 1st, 2026
Visit developer.wordnik.com →
What it does
Wordnik's API gives definitions from five dictionaries for more than 800,000 words, plus synonyms, antonyms and other related words, example sentences with their sources, audio pronunciations, a word of the day and random words. Use it for dictionary lookups, vocabulary apps or word games. Call the REST endpoints with GET and get JSON. Free with a free API key for nonprofit or research use, up to 100 calls an hour; commercial use needs a paid plan.
At a glance
- API key
- Needed, free · More APIs with a free key
- Pricing
- Free with a free API key for nonprofit or research use, up to 100 calls an hour; commercial use needs a paid plan.
- From the browser
- Yes (CORS)
- Formats
- JSON
- Interface
- REST, HTTP-GET
- Provider
- developer.wordnik.com
More information: https://developer.wordnik.com/
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Example request
curl
curl 'https://api.wordnik.com/v4/word.json/hello/definitions?api_key=YOUR_API_KEY'JavaScript
const response = await fetch("https://api.wordnik.com/v4/word.json/hello/definitions?api_key=YOUR_API_KEY");
const data = await response.json();
console.log(data);Python
import requests
response = requests.get(
"https://api.wordnik.com/v4/word.json/hello/definitions?api_key=YOUR_API_KEY",
timeout=30,
)
print(response.json())Replace YOUR_API_KEY with your own key. The JavaScript works in a web page as well as in Node.js 18 or newer.