MCP server

MailTester Email Verification Official

com.mailtester/email-verification

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.

Website Source

At a glance

Type

MCP server

Publisher

mailtester.com (verified by the MCP Registry)

Status

Working at last check

Tools

9

Token cost

About 987 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http email-verification https://app.mailtester.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.email-verification]
url = "https://app.mailtester.com/mcp"

Gemini CLI

{"mcpServers":{"email-verification":{"httpUrl":"https://app.mailtester.com/mcp"}}}

Cursor

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

VS Code

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

Antigravity

agy mcp add email-verification https://app.mailtester.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"email-verification","server_url":"https://app.mailtester.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"email-verification","server_url":"https://app.mailtester.com/mcp"}

Tools

• estimate_cost ~194 tokens
  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.
• explain_result ~154 tokens
  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 result means.
• get_api_key ~166 tokens
  Get your own free API key for this server (no account needed; 25 email verifications per day). Optional: the verification tools already work without a key on a shared trial. Returns the key once — reconnect with 'Authorization: Bearer <api_key>' for your own quota and the list tools.
• get_batch_status ~60 tokens
  Get the progress and status of a bulk verification list/job by id.
• get_credit_balance ~52 tokens
  Get the current credit balance and a short usage summary for the account.
• get_list ~72 tokens
  Get the details of a single bulk verification list by its id.
• list_lists ~81 tokens
  List the user's bulk verification lists/jobs, most recent first.
• verify_batch ~122 tokens
  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.
• verify_email ~86 tokens
  Verify the deliverability of a single email address. Returns a verdict (valid, invalid, risky, unknown). Costs 1 credit.

Browse

• Email

Related MCP servers

• Getlead
  Find B2B leads with verified work emails, find and verify emails, and run cold email outreach.
• AgentKit x402 MCP server
  Remote MCP tools for pay-per-call email, domain, SEO and Swedish data utilities (x402).
• Fairquery Agent Trust & Data Safety
  PII/secret redaction, email checks, sanctions screening, OSV lookups and an MCP server pre-check.
• Qualisend Email Verification
  Verify email addresses and clean lists to improve deliverability and sender reputation.
• agdata
  Unblocking and fresh web data for agents: URL to Markdown, YouTube, Maps, Amazon, jobs. Pay per call
• Couryo free email tools
  Free, no login: verify an email address, check SPF/DKIM/DMARC, explain SMTP errors, build SPF/DMARC.
• Agent Toolbox
  Everyday tools for AI agents, paid per call with x402: images, markdown, speech-to-text, embeddings.
• email59
  Send transactional email from AI agents: sign up by email code, no domain or DNS setup.

Badge for your README

[![AptLynx](https://aptlynx.net/badge/com.mailtester/email-verification.svg)](https://aptlynx.net/servers/com.mailtester/email-verification)

Listing text is written by the maker; AptLynx lists tools and does not vouch for them. Find another tool · Browse by topic · For agents