How to connect PureChecker to Claude Cowork

Connect Claude Cowork to PureChecker MCP. Verify deliverability for these customer emails, check if signup emails are disposable, and more using natural language, with authentication handled for you.

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PureChecker

Api Key

PureChecker verifies individual or batched email addresses for syntax, domain, deliverability, disposability, and risk signals. Use it to boost deliverability, remove risky/disposable addresses, and reduce bounce rates.

2 Tools

Managed auth

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Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your PureChecker account to Cowork via Composio Connect, enabling it to verify deliverability for these customer emails, check if signup emails are disposable, batch validate newsletter signup emails, and more such actions on your behalf without compromising your account security.

Also integrate PureChecker with

ChatGPT Work Hermes

Connecting PureChecker to Claude Cowork

1. Open Customize

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

2. Add the Composio MCP server

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

3. 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 Cowork

4. Connect your PureChecker account

Back in Cowork, ask the agent to connect to PureChecker or give it any PureChecker-related task.

For example, ask Cowork to:

"Verify deliverability for these customer emails"
"Check if signup emails are disposable"
"Batch validate newsletter signup emails"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your PureChecker account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like PureChecker through MCP without you sharing account credentials directly with the agent.

What is the PureChecker MCP server, and what's possible with it?

The PureChecker MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your PureChecker account. It provides structured and secure access so your agent can perform PureChecker operations on your behalf.

TOOLS

Supported Tools

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

Check Email

Check one email address and return PureChecker's detailed syntax, domain, mailbox, disposability, and risk signals.

Check Emails

Check a batch of email addresses in one request and return PureChecker's verification signals for each address.

FRAMEWORKS

How to build PureChecker MCP Agent with another framework

ChatGPT Work

Use PureChecker MCP with ChatGPT Work

Hermes

Use PureChecker MCP with Hermes

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FAQ

Frequently asked questions

With a standalone PureChecker MCP server, the agents and LLMs can only access a fixed set of PureChecker tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from PureChecker 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 PureChecker tools.

Yes, absolutely. You can configure which PureChecker 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 PureChecker data and credentials are handled as safely as possible.

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