Dictionary
Look up any English word: part-of-speech definitions with usage examples, IPA phonetics, pronunciation audio when available, and synonym/antonym lists. Live from the free Dictionary API — definitions agents can quote verbatim instead of inventing.
🔌 Server-side tool
This tool runs on the server (it fetches third-party URLs directly and cannot run in your browser). Use the paid JSON API below — the worked examples show real server-side results and refresh automatically.
Worked examples
A common word
GET /api/v1/live/dictionary?word=serendipity
Result: serendipity /ˌsɛ.ɹən.ˈdɪ.pɪ.ti/ — A combination of events which have come together by chance to make a surprisingly good or wonderful outcome.
Machine API (x402)
$0.003 / callThis tool is also a JSON API for AI agents. Requests without payment receive 402 Payment Required plus instructions; agents pay USDC on Base via the x402 protocol — no accounts, no API keys.
GET /api/v1/live/dictionary?word=serendipity HTTP/1.1
Host: agentstoolshub.com
→ 402 (payment required, instructions in headers)
→ 200 (after X-PAYMENT header; JSON body below)
{
"tool": "live/dictionary",
"input": {"word":"serendipity"},
"result": { "value": 1, "answer": "serendipity /ˌsɛ.ɹən.ˈdɪ.pɪ.ti/ — A combination of events which have come together by chance to make a surprisingly good or wonderful outcome." }
}Agent docs: /llms.txt · OpenAPI spec · integration guide
About this tool
Real dictionary entries — definitions grouped by part of speech, each with an example sentence where available, plus IPA phonetics, pronunciation audio and synonyms. Verbatim from the free Dictionary API and cached per word for a day; perfect for disambiguating what a term actually means.
Frequently asked questions
Which language is covered?
English (en). The source aggregates multiple dictionaries, so coverage of technical and archaic words is strong, but slang may be missing.
Why do some words return several rows per meaning?
Up to two definitions per part of speech are listed (noun, verb, adjective…), because most words are polysemous — 'run' has dozens of senses.