Dictionary API

Free · Livelanguage

Every word in the English language: existence checks, autocomplete, random words, and (as scraped) full definitions.

https://api.gargantuan.dev/v1/dictionaryFull reference →

Quick start

No key needed. Try a request right now:

Request
curl "https://api.gargantuan.dev/v1/dictionary/languages"

Or open it in your browser: https://api.gargantuan.dev/v1/dictionary/languages

Authentication & limits

No key required. Anonymous callers are rate-limited by IP. Send Authorization: Bearer <key> (or an X-Api-Key header) for a higher tier.

With a key (higher tier)
curl "https://api.gargantuan.dev/v1/dictionary/languages" \
  -H "Authorization: Bearer YOUR_API_KEY"

Also accepts X-Api-Key or ?api_key=. Limits ride in X-RateLimit-* headers; over the limit returns 429. See rate limits.

Datasets

Pick one with ?lang= (or the relevant param). 1 available:

DatasetCodeLocaleEntries
Englishenen274,937

Endpoints

Edit the inputs and hit Send request to try any endpoint live, right here. No key needed.

GET/v1/dictionary/languages

List the supported languages (datasets).

Request
https://api.gargantuan.dev/v1/dictionary/languages
GET/v1/dictionary/random

Return a random word.

Request
https://api.gargantuan.dev/v1/dictionary/random?lang=en
GET/v1/dictionary/search

Autocomplete: words that start with a prefix.

Request
https://api.gargantuan.dev/v1/dictionary/search?q=ser&limit=5&lang=en
GET/v1/dictionary/{word}

Look up a word: whether it exists, its length, and any definition.

Request
https://api.gargantuan.dev/v1/dictionary/serendipity?lang=en

FAQ

Is the Dictionary API free to use?

Yes. It is free and public. Anonymous requests need no key and are rate-limited by IP; a free API key raises your limits.

Do I need an API key?

No key is required to start. Send an Authorization: Bearer key (or an X-Api-Key header, or ?api_key=) to move to a higher tier.

What is the base URL?

https://api.gargantuan.dev/v1/dictionary

What are the rate limits?

Every response carries X-RateLimit-Limit and X-RateLimit-Remaining headers. Anonymous callers get the lowest tier (by IP); a free key is higher; Pro is highest. Over the limit returns 429 with Retry-After.

What format does it return?

JSON over HTTPS. Every response also includes a "source": "itsmattgeorge.com" attribution field.

Full reference & authentication
Params, live responses, keys, and every endpoint in one place.
Open the docs →