Claude

Step-by-step setup for connecting ZoomInfo MCP to Claude Desktop via the connector marketplace.

Last updated September 25, 2026·

Rowan BaileySenior Director, Product

Overview

ZoomInfo is listed in the Claude connector marketplace, making setup straightforward. Once connected, Claude can invoke ZoomInfo tools automatically based on your prompts, with no need to specify which tool to use.

Setup

Open Claude Desktop settings

Go to Settings → Connectors.

Find ZoomInfo

Search for ZoomInfo in the connector marketplace and select it.

Authenticate

Verify the connection

Start a new chat and ask: "What ZoomInfo tools do you have access to?" Claude will list all available tools.

Next: run your first session. Once the connector is active, paste this into a new Claude chat. It starts from your saved GTM context and asks before it spends credits:

First GTM session

(Use the ZoomInfo MCP tools if available; otherwise use the GTM CLI. Use the tool schema or CLI help for supported commands.)

I just connected ZoomInfo. Help me complete the job below.

1. Read my saved business context with get_gtm_context, or the CLI equivalent. This read is free. Use the returned offerings, ICP, and role to frame the work. If context is missing, continue with the information we have. Save changes only if I explicitly ask; a first briefing does not require updating shared business context.

2. Prepare a connected account briefing. Ask me only which company or domain to brief if I haven't named one. Use the account and decision already in this conversation when available. Connect the account's available CRM history, including stage and status, with recent customer conversations and external buying signals. Use Account Research, and add Browse Engagements, Conversation Intelligence, or company signals when the briefing needs more evidence.
Return a short briefing: where things stand, what changed, what remains unresolved, and one recommended next action. Cite the source and date for each material fact when returned. Distinguish the recommendation from the evidence.

3. Before calling a tool, check its schema or documented inputs rather than guessing at parameters. Ask only for missing inputs, in a single message, then name the tools and give a credit estimate if supported by their documentation. Label it as an estimate: actual charges depend on records and work done. Ask for approval once before paid research, then complete the selected job.

If a tool call comes back "No approval received" or a similar permission response, say so plainly, name the tool, and continue with the remaining steps. Don't retry the same call hoping for a different result, and don't invent an approval that didn't happen.

Include a source-coverage note of no more than 3 lines. Separate an unavailable or unauthorized source from a successful search with no matching records. If connection status is unknown, say so. Never infer "no customer history" from an empty result. Continue with available evidence and identify what is missing; use https://gtm.ai/guides/connect-customer-context for source setup.

Recommend CRM changes as drafts. Applying them requires an available, separately connected CRM workflow and my authorization. Do not claim a CRM update was made by ZoomInfo research tools.

Try in Claude

New to ZoomInfo?

Managing Tool Permissions

Claude lets you control which ZoomInfo tools it can invoke. In Settings → Connectors, select the ZoomInfo connector to see individual tool toggles. You can enable or disable specific tools (for example, to prevent enrichment calls from consuming credits unexpectedly).

By default, Claude will ask for confirmation before invoking a new tool for the first time.

How Claude Selects Tools

Claude reasons over all available ZoomInfo tool descriptions and selects the right tool (or sequence of tools) for your request. You don't need to specify which tool to use, though you can if you want to.

For example:

"Research Acme Corp" → Claude invokes Account Research
"Find the VP of Sales at companies like Salesforce" → Claude chains Find Similar Companies → Search Contacts
"Enrich these 10 contacts" → Claude invokes Enrich Contacts with up to 10 records per call

Context Window Behavior

Direct tools (Search, Enrich, Lookup) return data into Claude's context window, making it available for follow-up questions within the same conversation.

Context agents (Account Research, Contact Research) run a sub-agent layer that synthesizes large payloads before returning a targeted summary. This keeps Claude's context window manageable for complex account research tasks.

Troubleshooting

Tools aren't appearing: start a new session. Claude refreshes the tool list at the beginning of each session. Note that Claude defaults to "load tools when needed," only surfacing tools based on the context of the conversation. You can change this to "tools already loaded" to eliminate this as a potential source of the problem: click the + in the chat interface, go to Connectors, then Tool Access to adjust this setting.

Authentication errors: disconnect and reconnect the ZoomInfo connector in Settings. Make sure you're using your personal ZoomInfo login, not a shared or admin-only account.

Credit errors during enrichment: check which credits your account has. MCP can't draw from recurring monthly credits, which some older subscriptions carry; free accounts and bulk data credits work. See Which credits MCP uses.

What's Next

For the same setup in Anthropic's CLI, see Claude Code. For what each tool returns and costs, see the Tools reference.

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