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How to connect Findymail to Claude

Connect Claude Web, Desktop and Cowork to Findymail MCP. Find verified email for john at acme.com, create a new contact list for leads, and more using natural language, with authentication handled for you.

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Findymail is a B2B data provider offering verified email and phone contacts for sales prospecting. Enhance outreach with automated exports, email verification, and CRM enrichment.

21 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 Findymail account to Claude via Composio Connect, enabling it to find verified email for John at acme.com, create a new contact list for leads, verify deliverability of this email address, 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 Findymail with

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

Connecting Findymail 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 Findymail account

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

For example, ask Claude to:

  • "Find verified email for John at acme.com"
  • "Create a new contact list for leads"
  • "Verify deliverability of this email address"

It will prompt you to authenticate and authorize access.

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

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

The Findymail MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Findymail account. It provides structured and secure access to verified B2B contact data, so your agent can create and manage contact lists, find and verify emails, and streamline your outreach workflow automatically.

  • Automated contact list management: Let your agent create new contact lists, fetch all your lists, or delete lists as your prospecting needs change.
  • Precise contact discovery: Ask your agent to find and retrieve emails for prospects based on full name and company domain, making it easier to build targeted outreach campaigns.
  • Bulk contact retrieval: Direct your agent to list all contacts within a specific list, enabling quick access to leads for export or follow-up.
  • Email deliverability verification: Have your agent check if an email address is valid and safe to use before sending that crucial first message.
  • Seamless CRM enrichment: Use verified contact details to automatically enrich your CRM, helping you keep data accurate and actionable for your sales team.

Troubleshooting

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

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

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

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

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

  • 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 Findymail.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Findymail authorization link not work?

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

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

4. Why do Findymail actions fail after they worked before?

The Findymail connection can expire or lose permission.

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

5. How do I switch to a different Findymail account?

Claude can manage the Findymail connection for you.

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

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

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

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Findymail 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 Findymail.
TOOLS

Supported Tools

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

Add Excluded Domain

Tool to add domains to an exclusion list in Findymail.

Create Exclusion List

Tool to create a new exclusion list for Intellimatch searches.

Create Contact List

Tool to create a new contact list.

Delete Exclusion List

Tool to permanently delete an exclusion list by its ID.

Delete Contact List

Permanently deletes a contact list by its ID.

Find Email by Name

Tool to find someone's email using their full name and company domain.

Get Contact Lists

Tool to retrieve all contact lists.

Get Credits

Tool to check available API credits for your Findymail account.

Get Credits Summary

Tool to retrieve credits usage summary report for the authenticated account.

Get Credits Team Summary

Tool to retrieve team credits usage summary report.

Get Exclusion List

Tool to retrieve a specific exclusion list by ID.

Get Intellimatch Data

Tool to retrieve data from an Intellimatch search.

Get Intellimatch Status

Tool to check the status of an Intellimatch search job.

List Contacts

Tool to retrieve contacts from a specified list (paginated).

List Excluded Domains

Tool to retrieve domains excluded from Intellimatch searches.

List Exclusion Lists

Tool to retrieve all exclusion lists for managing excluded websites from Intellimatch searches.

Remove Excluded Domain

Tool to remove domains from the exclusion list.

Search Intellimatch

Tool to find companies and contacts using natural language queries.

Update Exclusion List

Tool to update an existing exclusion list.

Update Contact List

Tool to update an existing contact list.

Verify Email

Tool to verify the deliverability of an email address.

FRAMEWORKS

How to build Findymail MCP Agent with another framework

Claude Code logo

Claude Code

Use Findymail MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Findymail MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Findymail MCP with Claude Agent SDK

Codex logo

Codex

Use Findymail MCP with Codex

OpenClaw logo

OpenClaw

Use Findymail MCP with OpenClaw

Hermes logo

Hermes

Use Findymail MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Findymail MCP with Atomic Agent

Google ADK logo

Google ADK

Use Findymail MCP with Google ADK

LangChain logo

LangChain

Use Findymail MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Findymail MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Findymail MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Findymail MCP with LlamaIndex

CrewAI logo

CrewAI

Use Findymail MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Findymail MCP with Pydantic AI

AutoGen logo

AutoGen

Use Findymail MCP with AutoGen

FAQ

Frequently asked questions

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

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

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