How to connect Zoominfo to Claude

Connect Claude Web, Desktop and Cowork to Zoominfo MCP. Find companies in new york with over 500 employees, enrich this contact with latest job title, and more using natural language, with authentication handled for you.

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Zoominfo

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Zoominfo is a comprehensive B2B contact and company database platform. It helps teams find, enrich, and manage sales leads to accelerate revenue.

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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 Zoominfo account to Claude via Composio Connect, enabling it to find companies in New York with over 500 employees, enrich this contact with latest job title, list recent news about target accounts, 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 Zoominfo with

Claude Code OpenAI Agents SDK Claude Agent SDK Codex OpenClaw Hermes Atomic Agent Google ADK LangChain Vercel AI SDK Mastra AI LlamaIndex CrewAI Pydantic AI AutoGen

Connecting Zoominfo 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 Zoominfo account

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

For example, ask Claude to:

"Find companies in New York with over 500 employees"
"Enrich this contact with latest job title"
"List recent news about target accounts"

It will prompt you to authenticate and authorize access.

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

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

The Zoominfo MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Zoominfo account. It provides structured and secure access to rich B2B sales intelligence, so your agent can search companies, enrich contact and company data, analyze intent signals, and surface actionable go-to-market insights for you.

Company and contact data enrichment: Instantly have your agent pull detailed profiles, firmographics, and contact information for any business or person of interest.
Smart company and contact search: Let your agent find the right leads by searching Zoominfo's vast database using criteria like location, industry, and role.
Intent signal analysis: Enable your agent to analyze buying intent signals and help prioritize outreach based on real-time market activity.
Technology and news enrichment: Ask your agent to uncover what technologies a company uses or find the latest news and scoops about prospects and clients.
Location-based prospecting: Have your agent filter and enrich location details to support precise territory planning and targeted campaigns.

Troubleshooting

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

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

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

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

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

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

3. Why does the Zoominfo authorization link not work?

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

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

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

The Zoominfo connection can expire or lose permission.

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

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

Claude can manage the Zoominfo connection for you.

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

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

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

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

TOOLS

Supported Tools

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

Company Enrich

Contact Enrich

Intent Enrich

Location Enrich

News Enrich

Scoop Enrich

Technology Enrich

Company Search

Returns a list of Companies from ZoomInfo's data which meet the specified search criteria.

Company Search Inputs

Returns a list of fields you can use as input for the Company Search Action.

Contact Search

Returns a list of Contacts from ZoomInfo's data that meet the specified search criteria.

Contact Search Inputs

Returns a list of fields you can use as input for the Contact Search Action.

Intent Search Inputs

Returns a list of fields you can use as input for the Intent Action.

News Search

Returns a list of news articles from ZoomInfo's data which meet the specified search criteria.

News Search Inputs

Returns a list of fields you can use as input for the News Search endpoint.

Scoop Search

Returns a list of Scoops from ZoomInfo's data which meet the specified search criteria.

Scoop Search Inputs

Returns a list of fields you can use as input for the Scoop Search Action.

FRAMEWORKS

How to build Zoominfo MCP Agent with another framework

Claude Code

Use Zoominfo MCP with Claude Code

OpenAI Agents SDK

Use Zoominfo MCP with OpenAI Agents SDK

Claude Agent SDK

Use Zoominfo MCP with Claude Agent SDK

Codex

Use Zoominfo MCP with Codex

OpenClaw

Use Zoominfo MCP with OpenClaw

Hermes

Use Zoominfo MCP with Hermes

Atomic Agent

Use Zoominfo MCP with Atomic Agent

Google ADK

Use Zoominfo MCP with Google ADK

LangChain

Use Zoominfo MCP with LangChain

Vercel AI SDK

Use Zoominfo MCP with Vercel AI SDK

Mastra AI

Use Zoominfo MCP with Mastra AI

LlamaIndex

Use Zoominfo MCP with LlamaIndex

CrewAI

Use Zoominfo MCP with CrewAI

Pydantic AI

Use Zoominfo MCP with Pydantic AI

AutoGen

Use Zoominfo MCP with AutoGen

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FAQ

Frequently asked questions

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

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

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