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How to connect Fullenrich to Claude

Connect Claude Web, Desktop and Cowork to Fullenrich MCP. Enrich this list of leads with emails and phones, check your fullenrich credit balance right now, and more using natural language, with authentication handled for you.

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FullEnrich is a B2B contact enrichment platform that aggregates emails and phone numbers from 15+ data vendors. Instantly find and verify lead contact data to boost your outreach.

9 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 Fullenrich account to Claude via Composio Connect, enabling it to enrich this list of leads with emails and phones, check your Fullenrich credit balance right now, get the latest status of bulk enrichment job, 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 Fullenrich with

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Connecting Fullenrich 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 Fullenrich account

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

For example, ask Claude to:

  • "Enrich this list of leads with emails and phones"
  • "Check your Fullenrich credit balance right now"
  • "Get the latest status of bulk enrichment job"

It will prompt you to authenticate and authorize access.

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

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

The Fullenrich MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Fullenrich account. It provides structured and secure access to powerful B2B contact enrichment features, so your agent can perform actions like preparing contact lists, starting bulk enrichment jobs, retrieving batch results, and monitoring credit usage on your behalf.

  • Prepare and validate contact data lists: Guide your agent to create properly formatted lists of lead information for bulk enrichment, ensuring accuracy and readiness for processing.
  • Launch bulk enrichment jobs: Let your agent start large-scale enrichment tasks for up to 100 contacts at a time, aggregating verified emails and phone numbers from multiple vendors.
  • Retrieve bulk enrichment results: Automatically check on the status of ongoing jobs and fetch enriched contact data as soon as it's ready, streamlining your lead generation workflows.
  • Monitor workspace credit balance: Enable your agent to check your current API credit usage so you always know how many enrichment requests you have remaining.

Troubleshooting

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

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

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

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

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

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

3. Why does the Fullenrich authorization link not work?

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

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

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

The Fullenrich connection can expire or lose permission.

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

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

Claude can manage the Fullenrich connection for you.

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

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

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

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

Supported Tools

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

Create Contact Data List

Tool to create a list of contact data entries.

Get current credit balance

Tool to retrieve current workspace credit balance.

Get Bulk Enrichment Result

Tool to retrieve results of a bulk enrichment by enrichment ID.

Get Reverse Email Result

Tool to retrieve results from a reverse email lookup operation using reverse email ID.

Reverse Email Lookup

Tool to perform bulk reverse email lookup to retrieve full person and company profile from work or personal email addresses.

Search Company

Tool to search for companies based on filters including name, domain, industry, type, headquarters location, headcount, and founded year.

Search People

Tool to search for people based on filters including company, location, skills, position titles, and seniority levels.

Start Bulk Enrichment

Tool to start a bulk enrichment job.

Verify API Key

Tool to check if your API key is valid and return the associated workspace ID.

FRAMEWORKS

How to build Fullenrich MCP Agent with another framework

Claude Code logo

Claude Code

Use Fullenrich MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Fullenrich MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Fullenrich MCP with Claude Agent SDK

Codex logo

Codex

Use Fullenrich MCP with Codex

OpenClaw logo

OpenClaw

Use Fullenrich MCP with OpenClaw

Hermes logo

Hermes

Use Fullenrich MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Fullenrich MCP with Atomic Agent

Google ADK logo

Google ADK

Use Fullenrich MCP with Google ADK

LangChain logo

LangChain

Use Fullenrich MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Fullenrich MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Fullenrich MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Fullenrich MCP with LlamaIndex

CrewAI logo

CrewAI

Use Fullenrich MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Fullenrich MCP with Pydantic AI

AutoGen logo

AutoGen

Use Fullenrich MCP with AutoGen

FAQ

Frequently asked questions

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

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

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