Dictionary api MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Dictionary api MCP or direct API to look up word meanings, fetch synonyms, explore etymologies, and retrieve audio pronunciations through natural language.

Dictionary api logoDictionary api
Api Key

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

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Dictionary api
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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.

SETUP GUIDE

Connect Dictionary api MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
Install the Composio SDK and Claude Agent SDK
2

Create Tool Router Session

typescript
import { Composio } from '@composio/core';

const composio = new Composio({ apiKey: 'your-api-key' });

console.log("Creating Tool Router session...");
const { mcp } = await composio.create('your-user-id');
console.log(`Tool Router session created: ${mcp.url}`);
Initialize the Composio client and create a Tool Router session
3

Connect to AI Agent

typescript
import { openai } from '@ai-sdk/openai';
import { experimental_createMCPClient as createMCPClient } from '@ai-sdk/mcp';
import { generateText, stepCountIs } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: mcp.url,
    headers: { 'x-api-key': 'your-composio-api-key' }
  }
});

const tools = await client.tools();

const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{ role: 'user', content: 'Get the definition and synonyms for "serendipity"' }],
  stopWhen: stepCountIs( 5 )
});

console.log(`Agent: ${text}`);
Use the MCP server with your AI agent
SETUP GUIDE

Connect Dictionary api API Tool with your Agent

1

Install Composio

typescript
npm install @composio/openai
Install the Composio SDK
2

Initialize Composio and Create Tool Router Session

typescript
import OpenAI from 'openai';
import { Composio } from '@composio/core';
import { OpenAIResponsesProvider } from '@composio/openai';

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
Import and initialize Composio client, then create a Tool Router session
3

Execute Dictionary api Tools via Tool Router with Your Agent

typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: 'Get the definition and synonyms for "serendipity".'
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
Get tools from Tool Router session and execute Dictionary api actions with your Agent

Why Use Composio?

AI Native Dictionary api Integration

  • Supports both Dictionary api MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for reading, writing, and querying your Dictionary api data

Managed Auth

  • Built-in API key management—never expose keys in code
  • Central place to manage, scope, and revoke Dictionary api access
  • Per user and per environment credentials instead of hard-coded keys

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Dictionary api
  • Scoped, least privilege access to Dictionary api resources
  • Full audit trail of agent actions to support review and compliance
FAQ

Frequently asked questions

Yes, Dictionary api requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Yes. Composio is SOC 2 Type II compliant and is built to keep your Dictionary api connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

Create the key in your Dictionary api account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Dictionary api actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Dictionary api at any time.

When you connect a Dictionary api account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Dictionary api as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside Dictionary api. If Dictionary api lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Dictionary api at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Dictionary api connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment Dictionary api rejects the old key. Create a new key in Dictionary api and reconnect the account from the Composio dashboard or by asking your agent to reconnect Dictionary api. Nothing else changes.

Composio's free plan includes 100,000 tool calls per month with no credit card, which covers most personal Dictionary api use. Paid plans add higher limits and team features. Your Dictionary api plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Dictionary api accounts).

With Composio, you connect Dictionary api once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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