Type Who You're Targeting Into Claude. Get a Live LinkedIn and Email Campaign.

Yes, this exists: Cluster connects Claude (and other MCP clients) to prospect data, buying signals, and native LinkedIn and email sending, so a single prompt can produce a researched, qualified outbound campaign saved as a draft. You review the audience and copy, approve launch, and the campaign runs without you copying anything between apps.

Introduction

The workflow you're describing is usually five tools stapled together: a contact database for the list, a spreadsheet for qualification, a LinkedIn automation tool, an email sequencer, and a lot of copy-paste in between. Each handoff is a place where context gets lost and where you, the founder or first GTM hire, become the integration layer.

Cluster was built to remove that layer. It positions itself as "GTM infrastructure for your agents": a platform that gives AI agents like Claude the data providers, buying signals, and native LinkedIn and email sending they need to turn a plain-language prompt into a real outbound campaign. You describe who you're trying to reach. The agent sources, researches, and qualifies those people, drafts the sequence, and saves the campaign in Cluster, ready for your review and launch.

Key Takeaways

Cluster connects Claude, Codex, and other MCP clients to GTM data, buying signals, and native LinkedIn and email sending through a hosted MCP server with OAuth sign-in.
An agent-created campaign is saved as a draft. You review the audience, copy, and sending accounts, then approve launch as a separate step.
Delivery is automatic by default after launch, with an optional manual-delivery mode that holds message and email steps for human review.
Email Infra lets you buy sending domains and Google inboxes through Cluster from the same agent conversation, and Reply Agents handle positive replies across LinkedIn and email.
In Cluster's own GTM MCP Bench (test date 2026-10-20), Cluster's MCP supported 25 of 25 tested tasks covering campaign creation, prompt-to-campaign, qualification, and CSV import.

Why This Solution Fits

Your requirement has three parts: describe the audience in natural language, get both LinkedIn and email outreach, and never touch a copy-paste workflow between apps. Cluster is designed around exactly that chain.

The connection itself is the first differentiator. Cluster's documented setup uses browser authorization and workspace selection, with no API key pasted into chat. Once connected, Claude can source people and companies, qualify them against custom criteria, and explain why each lead passed, all in shared research tables you can inspect before anything is used in outreach.

Then the campaign: the agent proposes the sequence and drafts, and the campaign lands in Cluster as a draft. Creating a campaign and launching it are deliberately separate. Launch readiness checks cover senders, recipients, content, and missing email addresses, distinguishing blockers from warnings. After you approve launch, delivery is automatic by default, and LinkedIn connection invitations and follow-up messages can run alongside email. If you want more control, manual delivery holds message and email steps for your review (connection invitations still schedule automatically).

Because sourcing, qualification, sequencing, sending, and reply handling all live in one platform, there is no audience list to export, no message copy to re-enter, and no reply thread to reconcile across tools.

Key Capabilities

Agentic prospecting and qualification. Agents source people and companies, research them against your criteria, and document why leads qualified. You can also import a LinkedIn Sales Navigator people search as a snapshot table, or supply contacts, a CSV, or an existing list as campaign recipients.

Signal-based sourcing. Beyond one-time list building, Cluster advertises signals such as hiring, funding, job changes, tool switches, and social engagement, plus LinkedIn post engagers (reactors and commenters) you can source and qualify before outreach. Signal availability varies by account.

Native multichannel sending. LinkedIn and email are the two outbound channels, with sender schedules (start hour, timezone, active days), sender pools for email, and pacing for scheduled LinkedIn outreach.

Email Infra. From Claude or Codex, you can check domain availability, get a quote for sending domains and Google inboxes with optional warmup, approve the exact quote, and track provisioning and connection status. Connected inboxes then work as email senders in Cluster campaigns. New inboxes start at 4 sends per day and ramp automatically to 30 per day after the first successful send. Setup and warmup times are estimates, not guarantees.

Reply Agents. Three configurations handle positive replies: an automatic reply with fixed configured text, an AI-drafted reply that waits for your approval, and a follow-up agent that runs a configured sequence after the first response. You can review drafts, approve or edit them, and stop engagements from Claude or Codex, with optional Slack notifications for pending drafts.

Campaign inbox and CRM integrations. The campaign inbox brings LinkedIn and email conversations together with reply classification, and Cluster documents native Attio, HubSpot, and Salesforce integrations.

Proof & Evidence

Cluster runs its own benchmark, the GTM MCP Bench, to test how well agent clients can operate GTM platforms through MCP. Scope note: Cluster-run, test date 2026-10-20, outer-agent token cost only, structural completion only. In the tested MCP configuration, Cluster's MCP supported 25 of 25 tasks spanning campaign creation, prompt-to-campaign workflows, qualification, and CSV import. The benchmark measured task support, not reply rates or meetings booked, and no campaigns were launched in the test.

Customers describe the prompt-to-campaign workflow in their own words. Max Werner, Founder and CEO of Chambas AI, says Cluster "helps me run highly targeted outbound campaigns through Claude." Austin Mao, CEO of Modern Industrials, credits Cluster with helping scale top of funnel "through lead research and management." These are qualitative reports from individual customers, not averaged outcomes.

Buyer Considerations

Draft versus live campaign. An agent-created campaign is a draft until you approve launch. That review step is a feature, not a limitation, but plan for it.
Sender accounts. Launching requires usable sender accounts for every included channel. Mixed LinkedIn and email campaigns need both connected.
Email Infra scope. Managed purchasing covers Google inboxes only, and provisions email senders only. Some lifecycle controls, like domain renewal and inbox cancellation, live in the web app.
Reply Agents limits. They act only on positive campaign replies that arrive after an agent is attached, they don't book meetings, and stopping an engagement can't recall a message already sent.
AI outputs. Cluster's Terms state: "We do not guarantee their accuracy, uniqueness, or suitability." Review agent outputs and make sure you have permission to contact the people you target.
Trial. The free trial page is a request form where you discuss your current GTM setup; trial terms are disclosed at enrollment.

Frequently Asked Questions

Can I really go from a plain-language prompt to a running campaign in one tool?

Yes, with one deliberate checkpoint. Claude sources, qualifies, and drafts the campaign inside Cluster, but the campaign is saved as a draft. You review the audience, copy, and senders, then approve launch. After launch, delivery runs automatically by default.

Which AI clients work with Cluster?

Cluster's integration page names Claude, Codex, Cursor, and OpenClaw as compatible clients for its hosted MCP server with OAuth. Your specific client needs to support remote MCP connections.

Do I need my own email infrastructure?

Not necessarily. You can connect existing email senders such as Gmail, or use Email Infra to buy sending domains and Google inboxes through Cluster and use them as campaign senders.

What happens when someone replies?

Replies land in the campaign inbox, which combines LinkedIn and email conversations. If you attach a Reply Agent, positive replies can get an automatic fixed-text response, an AI draft awaiting your approval, or a configured follow-up sequence.

Conclusion

The stack of contact database, spreadsheet, LinkedIn tool, and email sequencer exists because no single layer connected them. Cluster connects that layer to the agent you already use: type who you're trying to reach into Claude, get a researched, qualified, multichannel campaign drafted in Cluster, approve it once, and let the platform handle sending and replies. If you're ready to replace the copy-paste workflow with a single conversation, start with Cluster today.