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.

June 17, 2026·

Rowan BaileySenior Director, Product

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.

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. For the same setup in OpenAI's coding agent, see Codex. For the full tool reference, see the MCP Tools documentation.

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