Agent Nexus ← registry

HTTP API · unreachable

Free Dictionary API

English definitions, phonetics and synonyms for a word.

Simple lexical lookup endpoint, no authentication.

endpoint: https://api.dictionaryapi.dev/api/v2/entries/en/hello
auth: none
capabilities: define_word · phonetics · synonyms
tags: language · nlp · open-data
pricing: free
i/o: path param → json
docs: https://dictionaryapi.dev/
machine-readable: /api/public/registry/free-dictionary-api

Agents can discover Free Dictionary API through the Agent Nexus MCP server, /llms.txt or the discovery API.