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How to integrate PureChecker MCP with Hermes

Connect Hermes 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 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

Introduction

Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.

This guide explains the easiest and most robust way to connect your PureChecker account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.

Also integrate PureChecker with

ChatGPTClaude CoworkAtomic Agent

What is Composio Connect?

Composio Connect is a consumer offering that lets anyone plug 1,500+ applications directly into their agent harness — including Hermes. It can:

  • Search and load tools from relevant toolkits on-demand, reducing context usage.
  • Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM.
  • Manage app authentication end-to-end with zero manual overhead.

Integrating PureChecker with Hermes

Using Composio Connect CLI

1. Install the Composio CLI

Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.

bash
curl -fsSL https://composio.dev/install | bash
Hermes authenticating with Composio

2. Authenticate

Once the CLI is installed, ask Hermes to authenticate with Composio.

3. Connect to PureChecker

Ask your agent to connect to PureChecker, or simply request any PureChecker-related task. Hermes will prompt you to authenticate and authorize access.

4. Done. You're all set with a new PureChecker connection.

Using Composio Connect MCP

1. Get your MCP URL and API Key

Go to dashboard.composio.dev and copy your Connect MCP URL and API key.

Copy MCP URL and API key from Composio dashboard

2. Open the Hermes config file

bash
nano ~/.hermes/config.yaml

3. Add the Composio Connect MCP server

bash
mcp_servers:
  composio:
    url: "https://connect.composio.dev/mcp"
    headers:
      x-consumer-api-key: "YOUR_COMPOSIO_API_KEY"
    connect_timeout: 60
    timeout: 180

Save with Ctrl + O, Enter, then exit with Ctrl + X.

4. Restart your Hermes agent

Once restarted, ask your agent to connect to PureChecker or request any PureChecker-related task. It will prompt you to authenticate and authorize access.

5. Done!

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 to email verification, so your agent can check individual addresses, validate batches, detect disposable emails, assess deliverability, and identify risk signals on your behalf.

  • Individual email verification: Have your agent check a single email address for syntax, domain, mailbox, disposability, and risk signals.
  • Batch email verification: Direct your agent to verify multiple email addresses in one request and review the result for each address.
  • Deliverability assessment: Let the agent inspect domain and mailbox signals to determine whether an email address is likely deliverable.
  • Disposable email detection: Instruct your agent to identify disposable addresses before adding them to your contact or marketing lists.
  • Email risk screening: Have your agent review verification risk signals and flag questionable addresses for further review.

Way Forward

With PureChecker connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.

From here, you can extend Hermes further:

  • Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you.
  • Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft.
  • Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt.

If you run into trouble or want to share what you've built, join the community or check out the Docs for deeper configuration options.

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 logo

ChatGPT

Use PureChecker MCP with ChatGPT

Claude Cowork logo

Claude Cowork

Use PureChecker MCP with Claude Cowork

Atomic Agent logo

Atomic Agent

Use PureChecker MCP with Atomic Agent

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. Hermes 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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