# Claude Code

> How to connect ZoomInfo MCP to Claude Code: install the ZoomInfo plugin for the hosted server plus 14 GTM skills, then authenticate over OAuth.

**Date:** 2026-06-17  
**Source:** https://gtm.ai/docs/mcp/clients/claude-code

---

## Overview

Claude Code is Anthropic's CLI coding agent. ZoomInfo ships as a plugin in Anthropic's official marketplace, so one command gives Claude Code the hosted ZoomInfo MCP server and 14 GTM skills together. Authentication is OAuth, with no developer app to register and no client secret to paste; the sign-in happens in your browser.

## Setup

  **Install the plugin**

From your terminal, run:

    ```bash
    claude plugin install zoominfo@claude-plugins-official
    ```

    The plugin lives in Anthropic's official marketplace, which Claude Code already knows about, so there's no marketplace to add first.

  **Connect and sign in**

Inside a Claude Code session, run `/mcp`, pick `zoominfo`, and choose **Authenticate**. Claude Code opens your browser to the ZoomInfo login.

  **Authenticate**

Sign in with your normal credentials or SSO. When the browser hands you back, the `zoominfo` server shows as connected and every tool and skill is live.

  **Verify the connection**

Ask a question that needs ZoomInfo data, like *"How many employees does Snowflake have?"* You'll see the tool invocation and arguments inline.

## What the Plugin Adds

The plugin bundles the hosted MCP server at `https://mcp.zoominfo.com/mcp` plus a set of skills, prewritten workflows that chain the underlying tools into finished output: account briefs, target lists, buying-committee maps, lead scores, meeting prep, and more. To run one explicitly, type its slash command, like `/build-list` or `/account-research`. Otherwise describe the outcome and Claude Code picks the skill that fits.

For the full skill list and a deeper walkthrough, see the [Claude Code setup guide](/guides/how-to-connect-to-zoominfo-mcp-in-claude-code).

## Add the MCP Server by Hand

If you only want the raw tools without the skills, register the server directly:

```bash
claude mcp add --transport http zoominfo https://mcp.zoominfo.com/mcp
```

Then run `/mcp`, pick `zoominfo`, and authenticate the same way. `--transport http` selects HTTP transport, since ZoomInfo's server does not use stdio.

## Troubleshooting

**`claude plugin install` can't find the plugin:** update Claude Code to a recent version. Older builds predate plugin support and the official marketplace.

**`/mcp` lists `zoominfo` but it won't authenticate:** re-run `/mcp`, select the server, and trigger Authenticate again. If the browser never opened, check that nothing is blocking your default browser from launching.

**Claude Code doesn't see any ZoomInfo tools:** run `/mcp` and confirm `zoominfo` shows as connected. If it's listed with an auth error, re-run the slash command to re-trigger OAuth.

**The connection stops working after a few hours:** your ZoomInfo session may have expired. Run `/mcp` to refresh tokens.

**Credit errors on enrichment or research calls:** MCP requires bulk data credits. Confirm with your ZoomInfo admin that your account has bulk credits enabled, not recurring monthly credits.

## What's Next

For the full walkthrough including every GTM skill, see [How to Connect ZoomInfo to Claude Code](/guides/how-to-connect-to-zoominfo-mcp-in-claude-code). For the same setup in OpenAI's coding agent, see [Codex](/docs/mcp/clients/codex). For the full tool reference, see the [MCP Tools documentation](/docs/mcp/tools).