Datamuse MCP

MCP server for Datamuse word-finding API

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "datamuse-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "datamuse-mcp"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

datamuse-mcp

MCP server for the Datamuse API (word search, rhymes, synonyms, and more).

This project is open source, free to use, and licensed under MIT.

About

datamuse-mcp is a local stdio MCP server that wraps Datamuse endpoints into validated MCP tools. It is designed for practical word-finding use cases in assistants and clients that support MCP.

Purpose

This server provides simple MCP tools to:

find synonyms, antonyms, and rhymes;
run autocomplete;
fetch lexical details (definitions, POS, syllables, pronunciation, frequency);
search by spelling pattern (*, ?) or phonetic similarity.

Requirements

Node.js >= 18
npm

Install

Terminal

npm install

Development

Terminal

npm run dev

Build & run

Terminal

npm run build
npm start

Manual JSON-RPC checks

bash

# List tools
echo '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' | node dist/index.js

# Call a tool
echo '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"find_synonyms","arguments":{"word":"happy"}}}' | node dist/index.js

More tool examples

config.json

{ "tool": "find_antonyms", "arguments": { "word": "happy", "max": 10 } }
{ "tool": "find_rhymes", "arguments": { "word": "love", "type": "perfect", "max": 20 } }
{ "tool": "find_similar_sounding", "arguments": { "text": "definately", "max": 15 } }
{ "tool": "find_by_pattern", "arguments": { "pattern": "s??r?", "meaning_hint": "celestial", "max": 25 } }
{ "tool": "find_related_words", "arguments": { "word": "music", "relation_type": "triggers", "max": 15 } }
{ "tool": "get_word_info", "arguments": { "word": "serendipity" } }
{ "tool": "autocomplete", "arguments": { "prefix": "astro", "max": 10 } }

Claude Desktop configuration

Add this to claude_desktop_config.json:

config.json

{
  "mcpServers": {
    "datamuse": {
      "command": "node",
      "args": ["/absolute/path/to/datamuse-mcp/dist/index.js"]
    }
  }
}

Exposed tools

find_synonyms
find_antonyms
find_rhymes
find_similar_sounding
find_by_pattern
find_related_words
find_adjectives_for_noun
find_nouns_for_adjective
get_word_info
autocomplete

Security and limits

The server runs over stdio (local usage recommended).
Outbound requests go to https://api.datamuse.com.
A local in-memory cache is used (5-minute TTL), with no disk persistence.
Datamuse may enforce request limits/quotas.

Publishing

For npm and MCP Registry deployment, see PUBLISHING.md.

Contributing

See CONTRIBUTING.md.

License

MIT — see LICENSE.

Read the full README →View source on GitHub →

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Frequently Asked Questions about Datamuse MCP

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "datamuse-mcp": { "command": "npx", "args": ["-y", "Datamuse MCP"] } }

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Technical Specs & Signals

CategoryDeveloper Tools

28Quality signal: Emerging · 28/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools9/30

Adoption & activity2/15

Community engagement0/10

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Documentation Overview

datamuse-mcp

MCP server for the Datamuse API (word search, rhymes, synonyms, and more).

This project is open source, free to use, and licensed under MIT.

About

datamuse-mcp is a local stdio MCP server that wraps Datamuse endpoints into validated MCP tools. It is designed for practical word-finding use cases in assistants and clients that support MCP.

Purpose

This server provides simple MCP tools to:

find synonyms, antonyms, and rhymes;
run autocomplete;
fetch lexical details (definitions, POS, syllables, pronunciation, frequency);
search by spelling pattern (*, ?) or phonetic similarity.

Requirements

Node.js >= 18
npm

Install

Terminal

npm install

Development

Terminal

npm run dev

Build & run

Terminal

npm run build
npm start

Manual JSON-RPC checks

bash

# List tools
echo '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' | node dist/index.js

# Call a tool
echo '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"find_synonyms","arguments":{"word":"happy"}}}' | node dist/index.js

More tool examples

config.json

{ "tool": "find_antonyms", "arguments": { "word": "happy", "max": 10 } }
{ "tool": "find_rhymes", "arguments": { "word": "love", "type": "perfect", "max": 20 } }
{ "tool": "find_similar_sounding", "arguments": { "text": "definately", "max": 15 } }
{ "tool": "find_by_pattern", "arguments": { "pattern": "s??r?", "meaning_hint": "celestial", "max": 25 } }
{ "tool": "find_related_words", "arguments": { "word": "music", "relation_type": "triggers", "max": 15 } }
{ "tool": "get_word_info", "arguments": { "word": "serendipity" } }
{ "tool": "autocomplete", "arguments": { "prefix": "astro", "max": 10 } }

Claude Desktop configuration

Add this to claude_desktop_config.json:

config.json

{
  "mcpServers": {
    "datamuse": {
      "command": "node",
      "args": ["/absolute/path/to/datamuse-mcp/dist/index.js"]
    }
  }
}

Exposed tools

find_synonyms
find_antonyms
find_rhymes
find_similar_sounding
find_by_pattern
find_related_words
find_adjectives_for_noun
find_nouns_for_adjective
get_word_info
autocomplete

Security and limits

The server runs over stdio (local usage recommended).
Outbound requests go to https://api.datamuse.com.
A local in-memory cache is used (5-minute TTL), with no disk persistence.
Datamuse may enforce request limits/quotas.

Publishing

For npm and MCP Registry deployment, see PUBLISHING.md.

Contributing

See CONTRIBUTING.md.

License

MIT — see LICENSE.