MailTester Email Verification

Last 30 days

Uptime

100%

Response time

348 ms typical, 348 ms slowest 5%

Last check

5 h ago

Next check

in 1 h

How to call it

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "mailtester-email-verification": {
      "type": "http",
      "url": "https://app.mailtester.com/mcp"
    }
  }
}

9 tools

• get_api_key

  Get a free API key for this server (no account needed; 25 email verifications per day). Returns the key once — reconnect with 'Authorization: Bearer <api_key>' to use the other tools.

• get_credit_balance

  Get the current credit balance and a short usage summary for the account.

• list_lists

  List the user's bulk verification lists/jobs, most recent first.

• get_list

  Get the details of a single bulk verification list by its id.

• explain_result

  Explain what a verification status or reason means in plain English, with a send recommendation. Covers valid, invalid, catch-all/accept-all, unknown, greylisted, disposable, role, free, spam-trap, abuse, do-not-mail, no-mx, disabled, and network. Use when a user asks what a resu

• verify_email

  Verify the deliverability of a single email address. Returns a verdict (valid, invalid, risky, unknown). Costs 1 credit.

• verify_batch

  Verify a batch of email addresses (up to 25 per call with an agent key). Returns per-email verdicts and saves a list. Costs 1 credit per email.

• estimate_cost

  Estimate the credit cost of a verification before running it, and whether the user can afford it. Provide either a count of emails, a list_id to re-verify, or an operation ('single'/'finder'). Always quote this before proposing anything billable.

• get_batch_status

  Get the progress and status of a bulk verification list/job by id.

Security scan

• No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

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