Do I need separate API keys for the dictionary and thesaurus?

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.

What happens if a word is not found?

If an exact match is not found, the API often returns a list of suggestions. Your agent will display these suggestions to help you find the correct term.

Can I see the part of speech for a word?

Yes! Every definition returned by the `define_word` tool includes the part of speech (e.g., noun, verb, adjective) next to the word headword.

Merriam-Webster MCP Server for OpenAI Agents SDK 2 tools — connect in under 2 minutes

Name: Merriam-Webster
Availability: InStock
Author: Vinkius

openai.github.io/openai-agents-python/mcp

Built by Vinkius GDPR 2 Tools SDK

The OpenAI Agents SDK enables production-grade agent workflows in Python. Connect Merriam-Webster through Vinkius and your agents gain typed, auto-discovered tools with built-in guardrails. no manual schema definitions required.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerStreamableHttp

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MCPServerStreamableHttp(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as mcp_server:

        agent = Agent(
            name="Merriam-Webster Assistant",
            instructions=(
                "You help users interact with Merriam-Webster. "
                "You have access to 2 tools."
            ),
            mcp_servers=[mcp_server],
        )

        result = await Runner.run(
            agent, "List all available tools from Merriam-Webster"
        )
        print(result.final_output)

asyncio.run(main())

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About Merriam-Webster MCP Server

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.

The OpenAI Agents SDK auto-discovers all 2 tools from Merriam-Webster through native MCP integration. Build agents with built-in guardrails, tracing, and handoff patterns. chain multiple agents where one queries Merriam-Webster, another analyzes results, and a third generates reports, all orchestrated through Vinkius.

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.

The Merriam-Webster MCP Server exposes 2 tools through the Vinkius. Connect it to OpenAI Agents SDK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Merriam-Webster to OpenAI Agents SDK via MCP

Follow these steps to integrate the Merriam-Webster MCP Server with OpenAI Agents SDK.

Install the SDK

Run pip install openai-agents in your Python environment

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token from cloud.vinkius.com

Run the script

Save the code above and run it: python agent.py

Explore tools

The agent will automatically discover 2 tools from Merriam-Webster

Why Use OpenAI Agents SDK with the Merriam-Webster MCP Server

OpenAI Agents SDK provides unique advantages when paired with Merriam-Webster through the Model Context Protocol.

Native MCP integration via `MCPServerSse`, pass the URL and the SDK auto-discovers all tools with full type safety

Built-in guardrails, tracing, and handoff patterns let you build production-grade agents without reinventing safety infrastructure

Lightweight and composable: chain multiple agents and MCP servers in a single pipeline with minimal boilerplate

First-party OpenAI support ensures optimal compatibility with GPT models for tool calling and structured output

Merriam-Webster + OpenAI Agents SDK Use Cases

Practical scenarios where OpenAI Agents SDK combined with the Merriam-Webster MCP Server delivers measurable value.

Automated workflows: build agents that query Merriam-Webster, process the data, and trigger follow-up actions autonomously

Multi-agent orchestration: create specialist agents. one queries Merriam-Webster, another analyzes results, a third generates reports

Data enrichment pipelines: stream data through Merriam-Webster tools and transform it with OpenAI models in a single async loop

Customer support bots: agents query Merriam-Webster to resolve tickets, look up records, and update statuses without human intervention

Merriam-Webster MCP Tools for OpenAI Agents SDK (2)

These 2 tools become available when you connect Merriam-Webster to OpenAI Agents SDK via MCP:

define_word

Get the definition of a word

get_thesaurus

Get synonyms and antonyms

Example Prompts for Merriam-Webster in OpenAI Agents SDK

Ready-to-use prompts you can give your OpenAI Agents SDK agent to start working with Merriam-Webster immediately.

"Define the word 'serendipity'."

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

"What is the origin of the word 'lexicographer'?"

Troubleshooting Merriam-Webster MCP Server with OpenAI Agents SDK

Common issues when connecting Merriam-Webster to OpenAI Agents SDK through the Vinkius, and how to resolve them.

MCPServerStreamableHttp not found

Ensure you have the latest version: pip install --upgrade openai-agents

Agent not calling tools

Make sure your prompt explicitly references the task the tools can help with.

Merriam-Webster + OpenAI Agents SDK FAQ

Common questions about integrating Merriam-Webster MCP Server with OpenAI Agents SDK.

How does the OpenAI Agents SDK connect to MCP?

Use MCPServerSse(url=...) to create a server connection. The SDK auto-discovers all tools and makes them available to your agent with full type information.