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Datamuse Thesaurus & Related Words API
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Datamuse Thesaurus & Related Words API is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Returns synonyms, antonyms, homophones, semantically similar words, or co-occurring related words for a given input word, powered by the Datamuse API.
Price / call$0.002
Success—
StatusUnknown
How this service works
Thesaurus / synonyms / antonyms / similar words / rhymes / Datamuse / paraphrasing / query expansion. Returns related words for a given input word, configurable across five modes: 'synonyms' (rel_syn), 'antonyms' (rel_ant), 'sounds_like' (homophones / rhymes), 'similar_meaning' (semantically near), or 'related' (commonly co-occurring triggers). Wraps the public Datamuse API — no auth, commercial-OK.
Output
A list of related words matching the requested mode (synonyms, antonyms, sounds_like, similar_meaning, or related co-occurring words), each typically including the word and a relevance score.
Example use cases
Example prompt
“Can you find me synonyms for the word 'happy' using the Datamuse thesaurus? Use the synonyms mode.”
Technical details
Endpoint
POSThttps://x402-deployer.x402-deployer.workers.dev/thesaurusWhen to prefer
Use this endpoint when you need fast, no-auth word relationship lookups — especially for NLP query expansion, thesaurus lookups, paraphrasing assistance, rhyme finding, or enriching text with semantically related terms. Prefer it over general LLM-based synonym suggestions when you need structured, scored word lists from a curated linguistic database.
Side effects
- Unknown or misspelled input word returns an empty list
- Invalid or unsupported mode value returns an error
- Network timeout to Datamuse upstream returns a gateway error
- Missing required 'word' parameter returns a 400 validation error
Input
{
"mode": "synonyms",
"word": "brilliant"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"mode": "synonyms",
"word": "brilliant",
"source": "https://www.datamuse.com",
"results": [
{
"word": "glorious",
"score": 46035
},
{
"word": "bright",
"score": 43054
},
{
"word": "vivid",
"score": 36038
},
{
"word": "impressive",
"score": 35031
},
{
"word": "intelligent",
"score": 32037
},
{
"word": "superb",
"score": 22036
},
{
"word": "reverberant",
"score": 21024
},
{
"word": "splendid",
"score": 18034
},
{
"word": "magnificent",
"score": 17036
},
{
"word": "ringing",
"score": 9034
},
{
"word": "colorful",
"score": 7026
},
{
"word": "brainy",
"score": 3032
},
{
"word": "colourful",
"score": 2023
},
{
"word": "smart as a whip",
"score": 2012
},
{
"word": "superior"
}
]
}Tags
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