Wordnik

Overview

Wordnik provides dictionary data — definitions, examples, pronunciations, and related words — from multiple sources. Auth is a free API key (an invalid key returns 401, verified).

Quick Start

Definitions (replace YOUR_KEY):

curl "https://api.wordnik.com/v4/word.json/hello/definitions?limit=3&api_key=YOUR_KEY"

[
  { "text": "An utterance of \"hello\"; a greeting.", "partOfSpeech": "noun", "sourceDictionary": "century" }
]

Examples and related:

curl "https://api.wordnik.com/v4/word.json/hello/examples?limit=2&api_key=YOUR_KEY"
curl "https://api.wordnik.com/v4/word.json/hello/relatedWords?api_key=YOUR_KEY"

Authentication

• Register at developer.wordnik.com → free API key (emailed).
• Send it as the api_key query parameter (invalid key → 401, verified).

Rate Limits & Notes

• Free tier: ~15,000 requests/day (check the docs); more via partnership.
• Endpoints: /v4/word.json/{word}/definitions, /examples, /relatedWords, /pronunciations, plus word lists.
• Data is aggregated from multiple dictionaries (century, GCIDE, wiktionary).

FAQ

Is Wordnik free? Free tier with a daily allowance; more is paid.

How do I get a key? developer.wordnik.com → register → key emailed.

What data is available? Definitions, examples, pronunciations, and related words.