🟠 AI Assistant · Local MCP server (stdio)

Verify emails with Claude before your AI SDR sends

Claude supports the Model Context Protocol (MCP) natively in both Claude Desktop and Claude Code. Add RocketVerifier's MCP server once, and Claude can verify addresses, run bulk jobs, and check deliverability signals directly inside your conversation — no copy-pasting into a dashboard.

Get Your API Key See Setup

Example, inside Claude:

"Verify this list of 200 leads from our latest webinar signup and give me a CSV of only the emails that are safe to email."

Claude calls RocketVerifier's verification API for you and hands back a clean, classified result — no dashboard upload, no manual CSV round-trip.

Setup

Connect Claude in 3 Steps

Takes about two minutes. Eligible work emails can apply for 100 free credits after signup, no card required.

Get an API key

Add the MCP config

Paste the snippet into claude_desktop_config.json, or Claude Code’s MCP settings, and restart.

Ask Claude to verify

Paste emails or a file into the chat and ask Claude to verify, clean, or segment them.

Add to claude_desktop_config.json (or Claude Code's MCP settings):

{
  "mcpServers": {
    "rocketverifier": {
      "command": "npx",
      "args": ["-y", "@rocketverifier/mcp"],
      "env": {
        "ROCKETVERIFIER_API_KEY": "rv_live_your_api_key"
      }
    }
  }
}

Full setup guides are in the MCP documentation and API reference.

Confidence scores, not guesses

Every result comes back with a 0–100 score and evidence — SMTP response, provider detection, DNS records — so Claude can make the send/skip call.

Idempotent by default

Every write request auto-generates an Idempotency-Key, so a retried or automated call can never double-charge credits or create duplicate jobs.

Never pay for a non-answer

Unknowns and duplicates are always free — unlike incumbents that charge for "risky" or "unknown" results your workflow can't act on.

FAQ

Claude verification FAQ

Does this work with both Claude Desktop and Claude Code?

Yes. Both support MCP servers configured to run locally via stdio, using the exact same npx command and config format.

Will Claude see my API key?

Your key lives in the local MCP config on your machine and is only used to authenticate requests to the RocketVerifier API — it is never sent to Anthropic.

Can I test this without spending credits?

Yes — use a sandbox key (rv_test_...) with @sandbox.rocketverifier.com addresses to see realistic responses for free.

Also works with

🟢 ChatGPT ⚡ Cursor 🔗 n8n

Connect Claude Today

Get an API key, drop in the config, and let Claude verify emails before you ever send. Eligible work emails can apply for 100 free credits.