Merriam-Webster

Merriam-Webster MCP Connector for Claude

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Official Merriam-Webster dictionary and thesaurus — access definitions and synonyms via AI.

2 tools Official Updated Jun 28, 2026 Official Vinkius Partner

Equip your AI agent with the gold standard of the English language via the Merriam-Webster MCP server. This integration provides your agent with instant access to the prestigious Collegiate Dictionary and Thesaurus. Your agent can instantly fetch precise definitions, audit etymologies, and retrieve comprehensive synonym/antonym lists without you ever needing to browse a physical dictionary or website. Whether you are refining your writing or verifying technical linguistic nuances, your agent acts as a dedicated lexicographer through natural conversation.

What you can do

  • Word Definitions — Retrieve detailed definitions, parts of speech, and pronunciations for thousands of English words.
  • Thesaurus Auditing — Fetch extensive lists of synonyms, antonyms, and related words to enrich your vocabulary.
  • Usage Examples — Access authentic sentence examples to understand how words are used in real-world contexts.
  • Linguistic Intelligence — Verify the correct spelling and grammatical category of complex terms.
  • Discovery — Identify related words and linguistic patterns through aggregate search results.

How it works

  1. Subscribe to this server
  2. Enter your Merriam-Webster Dictionary and Thesaurus API Keys
  3. Start managing your linguistic intelligence from Claude, Cursor, or any MCP-compatible client

Who is this for?

  • Writers & Editors — instantly find the perfect word and verify definitions during the creative process.
  • Students & Language Learners — explore the nuances of English vocabulary and usage through an AI-guided interface.
  • Content Creators — retrieve synonyms and usage examples to polish scripts, articles, and social media posts.
  • IT & Legal Professionals — verify the precise meaning of technical and formal terminology.
  • Developers — integrate reliable linguistic data into their applications through natural language queries.
dictionarythesauruslinguisticsetymologydefinitionssynonymslanguage-tools

2 tools expose this connector's capabilities to your AI agent.

define_word

Get the definition of a word

get_thesaurus

Get synonyms and antonyms

See how to talk to your AI agent using Merriam-Webster.

Define the word 'serendipity'.

Retrieving the definition for 'serendipity'... It is a noun referring to the faculty or phenomenon of finding valuable or agreeable things not sought for. Would you like to see usage examples?

Find synonyms for 'eloquent' in the Merriam-Webster thesaurus.

Searching for synonyms of 'eloquent'... I've found several related words including 'articulate', 'fluent', and 'silver-tongued'. I can also list antonyms if you're interested.

What is the origin of the word 'lexicographer'?

Fetching etymology for 'lexicographer'... The term comes from the Greek 'lexikon' (dictionary) and 'graphos' (writer). It literally means a writer of dictionaries. Should I check its specific definition in the dictionary?

Yes, Merriam-Webster provides separate keys for the Collegiate Dictionary and the Collegiate Thesaurus. You must provide both in the credentials section to enable all tools.

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