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How to connect Dictionary api to Claude

Connect Claude Web, Desktop and Cowork to Dictionary api MCP. Get the definition and synonyms for 'ubiquitous', find the origin and pronunciation of 'serendipity', and more using natural language, with authentication handled for you.

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Dictionary api is the Merriam-Webster API providing rich dictionary and thesaurus data for developers. Instantly access definitions, synonyms, etymologies, and audio pronunciations in your apps.

1 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Dictionary api account to Claude via Composio Connect, enabling it to get the definition and synonyms for 'ubiquitous', find the origin and pronunciation of 'serendipity', list antonyms for the word 'ambiguous', and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Dictionary api with

Claude CodeOpenAI Agents SDKClaude Agent SDKCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Dictionary api to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Dictionary api account

Back in Claude, ask it to connect to Dictionary api or give it any Dictionary api-related task.

For example, ask Claude to:

  • "Get the definition and synonyms for 'ubiquitous'"
  • "Find the origin and pronunciation of 'serendipity'"
  • "List antonyms for the word 'ambiguous'"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Dictionary api account is ready to use.

What is the Dictionary api Claude Connector, and what's possible with it?

The Dictionary api MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Dictionary api account. It provides structured and secure access to comprehensive dictionary and thesaurus data, so your agent can look up definitions, explore word origins, access pronunciations, and discover synonyms or antonyms on your behalf.

  • Instant word definition lookup: Ask your agent to fetch clear, detailed definitions for any word you encounter.
  • Etymology and origin insights: Let the agent retrieve the historical roots and language origin of specific words for deeper understanding.
  • Audio pronunciation access: Have your agent provide accurate audio pronunciations, helping with proper usage and learning.
  • Synonyms and antonyms discovery: Quickly find synonyms and antonyms to enrich your vocabulary or refine your writing style.
  • Comprehensive lexical information: Enable your agent to surface all available meanings, usage examples, and nuanced word senses for precise communication.

Troubleshooting

1. Why does Claude not use the Composio connector for Dictionary api?

The connector can show as connected, but Claude must use it in each Dictionary api conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Dictionary api again.

2. Why does Claude show an MCP server error before Dictionary api connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Dictionary api.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Dictionary api.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Dictionary api authorization link not work?

The Composio connector is one server. Your Dictionary api account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Dictionary api connection.
  • Composio creates a fresh Dictionary api authorization link.
  • Open that link in your browser and finish the Dictionary api sign-in.

4. Why do Dictionary api actions fail after they worked before?

The Dictionary api connection can expire or lose permission.

  • Ask Claude to inspect the Dictionary api connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Dictionary api account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Dictionary api.
  • If the action still fails with a permission error, check that the connected account has that permission in Dictionary api itself.

5. How do I switch to a different Dictionary api account?

Claude can manage the Dictionary api connection for you.

  • Ask Claude to disconnect or delete the current Dictionary api account.
  • Ask Claude to connect Dictionary api again.
  • Open the new Composio authorization link for Dictionary api.
  • Sign in with the other Dictionary api account in the browser.
  • After the account connects, ask Claude to retry the Dictionary api task.

6. Why is my Dictionary api connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Dictionary api connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Dictionary api tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Dictionary api.
TOOLS

Supported Tools

Every Dictionary api action and event your agent gets out of the box.

Get Word Definition

Retrieve comprehensive dictionary data for a word including definitions, phonetics, etymology, synonyms, and antonyms.

FRAMEWORKS

How to build Dictionary api MCP Agent with another framework

Claude Code logo

Claude Code

Use Dictionary api MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Dictionary api MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Dictionary api MCP with Claude Agent SDK

Codex logo

Codex

Use Dictionary api MCP with Codex

OpenClaw logo

OpenClaw

Use Dictionary api MCP with OpenClaw

Hermes logo

Hermes

Use Dictionary api MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Dictionary api MCP with Atomic Agent

Google ADK logo

Google ADK

Use Dictionary api MCP with Google ADK

LangChain logo

LangChain

Use Dictionary api MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Dictionary api MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Dictionary api MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Dictionary api MCP with LlamaIndex

CrewAI logo

CrewAI

Use Dictionary api MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Dictionary api MCP with Pydantic AI

AutoGen logo

AutoGen

Use Dictionary api MCP with AutoGen

FAQ

Frequently asked questions

With a standalone Dictionary api MCP server, the agents and LLMs can only access a fixed set of Dictionary api tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Dictionary api and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Dictionary api tools.

Yes, absolutely. You can configure which Dictionary api scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Dictionary api data and credentials are handled as safely as possible.

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