Outbound sales usually means paying for four or five tools: a contact database, an email finder, a signals tool and a sequencer. Most of them resell the same underlying APIs with a markup on credits. Your prospect lists end up in someone else's cloud. And the new wave of "AI SDRs" sends email on its own, which is a fast way to burn a domain.

I wanted something different: let my AI assistant do the legwork of a sales development rep, call the data providers directly with my own keys, keep everything on my machine, and never send anything without asking me first. So I built OpenSDR.

How It Helps

OpenSDR is an MCP server, so it plugs into Claude Desktop, Claude Code, Cursor and other MCP clients. You describe who you want to reach, and your assistant:

• Finds prospects that match your ideal customer profile (Apollo).
• Finds and verifies work emails through a cost-aware waterfall: Apollo, then Hunter, then free local checks.
• Spots buying signals like funding, hiring and leadership changes, with a source link for every one (Tavily or Exa).
• Drafts grounded outreach, where every personalized line cites a real, sourced fact.
• Stages campaigns and CRM records in Instantly and HubSpot, only after you approve a preview.

You pay providers directly, with no markup. Every key is optional, and with no keys at all it runs in a demo mode on fictional data, so you can try every tool first.

How It Works

There are five steps.

1. Find. Your description becomes precise search filters. Search never returns emails, so it's cheap.
2. Enrich. Each person goes through the email waterfall, which stops at the first verified result and stays within a credit budget. Every result shows a trail of what was tried and what it cost, and results are cached so you never pay twice.
3. Research. Buying signals give a reason to reach out now. Each signal has a URL you can open and check.
4. Draft. OpenSDR doesn't write emails. It hands your assistant sourced facts, a sequence framework and writing rules: cite one fact per first line, never invent anything, always include an opt-out line. Your assistant writes, and you approve.
5. Stage. Creating a campaign, enrolling leads or syncing to the CRM first returns a preview and a single-use confirmation token. The action runs only after you confirm.

Here's a real exchange in demo mode:

Me: Meridian Pay asked us not to contact them. Push the rest into my Instantly campaign.
Claude: Preview, nothing sent yet: 4 eligible, 1 excluded (Meridian Pay, suppressed). Shall I confirm?

Guardrails

• Nothing sent without approval: every external write is preview and confirm, and the confirm is rejected if anything you approved changed in between.
• Drafts only: campaigns are created as drafts and never activated, and leads only go into draft or paused campaigns. You press "go" in Instantly yourself.
• Do-not-contact list: honored by every push, sync and export, with no override.
• Local-first: no OpenSDR server, no telemetry, and API keys are never logged or stored.
• No LinkedIn automation: it only drafts notes for you to send yourself.

The Trade-off

OpenSDR has no AI model of its own. Your assistant does the thinking and writing, and OpenSDR handles the data, verification and safe execution. That keeps it cheap and predictable, but the quality of the copy depends on the assistant you use and the seller profile you give it.

Try It

OpenSDR is at version 1.0.1 and needs Node.js 22.12 or later. Add it to Claude Code:

claude mcp add opensdr -- npx -y opensdr-mcp

For Claude Desktop, download opensdr-mcp.mcpb from the latest GitHub release and double-click it. Then ask:

Find VP Engineering leaders at fintech companies, get their emails, and check for buying signals.

Add your Apollo, Hunter or Tavily keys when you're ready for real data.

• npm: https://www.npmjs.com/package/opensdr-mcp
• GitHub: https://github.com/arif-js/opensdr-mcp
• MCP Registry: io.github.arif-js/opensdr-mcp
• Smithery: https://smithery.ai/servers/arif-js/opensdr-mcp
• Glama: https://glama.ai/mcp/servers/arif-js/opensdr-mcp

It's MIT licensed and open to contributions. If there's a provider you want, like Smartlead, Lemlist or Salesforce, open an issue.