Word Finder API — thesaurus, rhymes & autocomplete (no key)

A Swiss-army knife for words, behind a clean HTTP API (and MCP tool). Find words by meaning, sound, spelling pattern (wildcards), rhyme, synonyms/antonyms, statistical associations, related adjectives/nouns, and sentence context — plus autocomplete. Perfect for writing assistants, crossword & word games, SEO/keyword tools, poetry, and language agents. No API key. Pay per query.

• 🧠 Meaning — words that mean something similar (means), synonyms, antonyms.
• 🎵 Sound & rhyme — rhymesWith, soundsLike, homophones.
• 🔤 Spelling — spelledLike with wildcards (? = one letter, * = any run) — great for crosswords.
• 🔗 Associations — relatedTo, adjectivesFor a noun, nounsFor an adjective, and left/right context words.
• ⌨️ Autocomplete — prefix → suggestions.
• 📖 Optional definitions and syllable counts.
• 💵 Pay per query · no key.

The use case it was built for

"Give me words that rhyme with code", "adjectives that go with ocean", "a 4-letter word t??k", or "autocomplete astr" — one call, ranked results. Combine constraints (e.g. means happy and rhymes with day) for precise word finding.

Sample output (words, rhymesWith "code")

{
  "ok": true, "constraints": { "rhymesWith": "code" }, "count": 5,
  "words": [
    { "word": "road", "score": 3548, "syllables": 1 },
    { "word": "load", "score": 1979, "syllables": 1 },
    { "word": "mode", "score": 1663, "syllables": 1 }
  ]
}

How to use

• HTTP API (Standby): POST or GET /words, /suggest. GET / returns help. Example: GET /words?means=happy&rhymesWith=day.
• Normal run: pass { operation, ...constraints }; results land in the dataset + key-value store.
• MCP tool: expose it to your agent via Apify's MCP server.

Input

• operation — words · suggest.
• words constraints (combine any): means, rhymesWith, soundsLike, spelledLike, synonymsOf, antonymsOf, relatedTo, adjectivesFor, nounsFor, followsWord, precedesWord, topics, includeDefinitions, max.
• suggest: prefix, max.

Pricing

Per query from $0.003 (down to $0.0008 on higher tiers). One call = one query.

Related Actors

• Wikipedia API — article search, summaries and content.
• Open Library Books — books, editions and authors.

FAQ

Do I need a key? No.

Can I combine constraints? Yes — e.g. means=happy + rhymesWith=day returns cheerful words that rhyme with "day". Datamuse intersects the constraints.

Wildcards for crosswords? Yes — spelledLike=t??k matches four-letter words; * matches any run of letters (e.g. *tion).

Notes & limits

Powered by the Datamuse API (English, with some multilingual support). Results are ranked by Datamuse's relevance score. Up to 100 results per call.