freeapis

Collins

Bilingual Dictionary and Thesaurus Data

Authentication
API Key
HTTPS
Yes
CORS
Unknown
Category
Dictionaries
Data source
public-apis + marcelscruz

Overview

Collins provides dictionary data — key-based.

⚠️ Status (verified 2026-08): the API returned HTTP 403 (Cloudflare challenge page) — automated clients are blocked. Verify from your network before relying on it.

What it provides

curl "https://api.collinsdictionary.com/api/v1/dictionaries/english/entries/test" \
  -H "accessKey: YOUR_KEY"

Notes

  • Bilingual dictionaries.
  • 403 Cloudflare challenge (verified).

FAQ

Is Collins free? Key-based with a free tier per the docs.

Why 403? Cloudflare blocks automated clients (verified) — try a browser.

What does it return? Dictionary data.

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