API archive entry · source-reported
Wordnik
Dictionary Data
Other Dictionaries APIs
These records share a directory category and are ordered by similarity of reported access facts. They are a shortlist, not proof of drop-in compatibility.
Collins
Bilingual Dictionary and Thesaurus Data
API key · HTTPS reported · CORS Unknown
Merriam-Webster
Dictionary and Thesaurus Data
API key · HTTPS reported · CORS Unknown
Synonyms
Synonyms, thesaurus and antonyms information for any given word
API key · HTTPS reported · CORS Unknown
Words
Definitions and synonyms for more than 150,000 words
API key · HTTPS reported · CORS Unknown
Lingua Robot
Word definitions, pronunciations, synonyms, antonyms and others
API key · HTTPS reported · CORS Yes
OwlBot
Definitions with example sentence and photo if available
API key · HTTPS reported · CORS Yes
How to compare them
Coverage
Compare exact endpoints, fields, geography, history, and update frequency.
Operating cost
Model request volume, caching, overages, support, and migration cost.
Integration risk
Test auth, errors, pagination, latency, versioning, and outage behavior.
Data rights
Review attribution, redistribution, retention, privacy, and commercial-use terms.
Source reference
This page separates source-reported facts from questions that need live provider verification.