Claude Cowork
How to connect ZoomInfo MCP to Claude Cowork: install the ZoomInfo plugin to bring the hosted server plus 14 GTM skills into Anthropic's knowledge-work agent.
Rowan BaileySenior Director, ProductOverview
Claude Cowork is Anthropic's agentic AI for knowledge work. You give it a goal and it works across your computer, local files, and connected apps to return a finished deliverable, which makes it a natural fit for GTM research, list building, and account prep. ZoomInfo ships as a plugin in Anthropic's official marketplace, so one command brings the hosted MCP server and 14 GTM skills into Cowork. Authentication is OAuth, with no developer app to register and no client secret to paste.
Cowork runs in the Claude desktop app and is available on any paid Claude plan.
Setup
Install the plugin
From your terminal, run:
claude plugin install zoominfo@claude-plugins-officialThe plugin lives in Anthropic's official marketplace, so there's no marketplace to add first.
Connect and sign in
Open Cowork's connectors, select zoominfo, and choose Authenticate. Cowork opens your browser to the ZoomInfo login.
Authenticate
Sign in with your normal credentials or SSO. When the browser hands you back, ZoomInfo shows as connected and every tool and skill is live.
Verify the connection
Give Cowork a task that needs ZoomInfo data, like "Research Acme Corp and draft a one-page account brief." It pulls live data and returns the finished document.
Enterprise plugin marketplaces
If your organization runs a private plugin marketplace, an admin can publish the ZoomInfo plugin there so it installs without the command above. Check with your Claude workspace admin if you don't see it.
What the Plugin Adds
The plugin bundles the hosted MCP server at https://mcp.zoominfo.com/mcp plus a set of GTM skills, prewritten workflows that turn the underlying tools into finished output: account briefs, target lists, buying-committee maps, lead scores, meeting prep, and more. Describe the outcome you want and Cowork selects the skill that fits, then works the task end to end.
For the full skill list, see the Claude Code setup guide, which uses the same plugin.
How Cowork Uses ZoomInfo
Cowork reads the ZoomInfo tool and skill descriptions and picks what fits the goal you set. Because Cowork runs multi-step work on its own, a single prompt can chain several ZoomInfo calls: find similar companies, pull the buying committee, enrich the contacts, then assemble the result into a document or spreadsheet on your machine.
Research tools and skills synthesize large payloads before returning a summary, which keeps long-running tasks manageable. Each enrichment record consumed counts against your bulk data credits, the same as every other client.
Troubleshooting
claude plugin install can't find the plugin: update the Claude desktop app to a recent version. Older builds predate plugin support and the official marketplace.
ZoomInfo won't authenticate: re-open the connector and trigger Authenticate again. If the browser never opened, check that nothing is blocking your default browser from launching.
Cowork doesn't use ZoomInfo: confirm the connector shows as connected. Naming ZoomInfo in your prompt ("use ZoomInfo to research this account") biases Cowork toward the connector when a task could be answered other ways.
The connection stops working after a few hours: your ZoomInfo session may have expired. Reconnect to refresh it.
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 coding-agent sibling that uses the same plugin, see Claude Code. For the full tool reference, see the MCP Tools documentation.