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Email Verifier
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Verify Emails Inside Claude

Connect ReachStream Email Verifier to Claude and verify one address, a handful or a whole list right from your chat. See which emails are safe to send to before you hit send, with no dashboard visit needed.

Get Started With Claude
ClaudeEmail Verifier
Check these three emails: jane@acme.com, john@acme.com, bad-address@example.com.
Request submitted#310881 · pending
Verification complete3 of 3

All 3 emails are verified:

  • jane@acme.comValid
  • john@acme.comCatch-All
  • bad-address@example.comInvalid
Reply to Claude…
MCP ConnectorReachStream EmailVerifierYour ReachStream account
Email Verifier#310881
completeCredits used 3
  • jane@acme.comValid
  • john@acme.comCatch-All
  • bad-address@example.comInvalid
1 credit per verified emailSample run
  • 98.8%

    Verification accuracy

  • 10,000emails

    In a single request

  • 1credit

    Per successfully verified email

  • 100free credits

    No credit card required

Start Verifying in Four Steps

Connect once, then verify any email by asking Claude.

Add the Connector

Open Settings → Connectors in Claude and add the ReachStream EmailVerifier connector.

Sign In

Sign in with your ReachStream account to use your existing plan and credits.

Ask Claude

Ask Claude to verify one address, a handful or a whole list.

Get Results

See which addresses are safe to send to as soon as verification finishes.

Watch a Verification From Start to Finish

Pick a prompt and follow every step, from the request to the results.

ClaudeEmail Verifier
Reply to Claude…
Email VerifierSample run

    Act on Every Result

    Use each result to decide which addresses to keep and which to remove before you send.

    • Valid

      The mailbox exists and can safely receive mail.

    • Catch-All

      The domain accepts mail for any address, so this specific mailbox can't be individually confirmed.

    • Risky-Valid

      The mailbox appears to exist but has traits that raise deliverability risk, such as a role-based address.

    • Risky

      There's an elevated chance of a bounce or blocklist hit, for example with disposable or temporarily rejecting addresses.

    • Invalid

      The mailbox doesn't exist, or the address is malformed or undeliverable. Don't send to it.

    • Do Not Mail

      The address is a spam trap or otherwise flagged as unsafe to contact. Never send to it, as doing so can damage your sender reputation.

    Connect Email Verifier to Claude

    Add the connector once in the Claude web app or Claude Desktop, then verify emails in any chat.

    Connect on claude.ai

    Follow these four steps in your browser.

    1. Go to claude.ai and open Settings → Connectors.
    2. Select Add custom connector and paste the connector URL from the setup guide.
    3. Sign in with your ReachStream account using email and password, Google, Microsoft or LinkedIn.
    4. Wait for Connected, then ask Claude to verify an email.

    Get the Full Setup Guide

    Follow the step-by-step setup for the ReachStream EmailVerifier connector, learn what each result means, check credits and limits, and fix common issues.

    • Set up the connector
    • Understand your results
    • Check credits and limits
    • Fix common issues
    Read the Documentation

    Committed To Security, Privacy & Compliance

    Our security-first approach combines robust data protection, privacy-focused practices, and global compliance standards to create a trusted platform for every user.

    • SOC 2 Type II

      Service organization controls

      Verified

    • GDPR

      EU data protection

      Verified

    • ISO 27001:2022

      Information security management

      Verified

    • CCPA

      California consumer privacy

      Verified

    • PIPEDA

      Canadian privacy law

      Verified

    • DPDPA 2023

      Integrated 2025 rules

      Verified
    Visit the Trust Center

    Frequently Asked Questions

    What does the ReachStream EmailVerifier connector do?

    It lets you verify email addresses right from a Claude conversation, without opening the ReachStream dashboard. Ask Claude to verify one address, a handful or a whole list, and it submits the request, waits for the result and tells you which addresses are safe to send to.

    Which Claude apps can I use it with?

    Add the connector in the Claude web app at claude.ai or in Claude Desktop, then verify emails in any chat. Follow the setup guide for step-by-step instructions.

    Do I need a ReachStream account?

    Yes. Sign in with the same login you use on reachstream.com, and verifications draw on your existing plan and credits. New to ReachStream? Grab 100 free credits to get started.

    How many credits does verification use?

    Each successfully verified email uses 1 credit from your ReachStream Email Verifier plan. Emails that fail to process, such as a malformed address, aren't charged. Submit up to 10,000 email addresses in a single request.

    How long does verification take?

    A single email is usually verified in the time it takes to read Claude's reply. Larger lists take proportionally longer, so keep chatting with Claude while they run.

    What if a result stays "pending"?

    Verification runs in the background, so larger lists aren't instant. Ask Claude to check again in a moment, and it keeps checking until the final result is ready.

    Start Verifying Emails in Claude

    Connect Email Verifier to Claude and verify your next list before you hit send. New to ReachStream? Grab 100 free credits to get started.

    Grab 100 Free Credits Get a Demo
    • 30-day free trial
    • No credit card required