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fastCRW Pergamon
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Datamuse

api.datamuse.com

A word-finding engine: rhymes, near-rhymes, synonyms, antonyms, words with a given meaning, spelling patterns, related adjectives and nouns, with scores and syllable counts.

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Runs on your machine under the source's own terms

The crw MCP on your computer calls Datamuse directly. Calls cost no credits and the data does not pass through fastCRW. Install it once for Claude Code, Cursor, Codex, Windsurf, Gemini CLI or OpenCode, with your fastCRW API key in place of the placeholder:

Ask with this source

A prompt for your agent that names this source and how to call it through the crw MCP.

  • Find words

    Use Datamuse (datamuse) from fastCRW Pergamon, capability "Find words" (search). You need words that rhyme with, mean, sound like, or relate to a given word. Example options: rel_rhy=forgetful, ml=ringing in the ears, sp=??????. Use the crw MCP tools: crw_find_data to confirm the source and its options, then crw_get_data with provider "datamuse" and capability "search". Tell me the credits used and cite the licence from the response. If the crw MCP tools are missing, install them with: npx -y crw-mcp install --api-key <your fastCRW API key>