The MailTester Email Verification MCP server,
connected in one click.
Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key. Connect the official MailTester Email Verification MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add MailTester Email Verification to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http mailtester-email-verification https://app.mailtester.com/mcpRun in your terminal, then restart Claude Code.
MailTester Email Verification · https://app.mailtester.com/mcp
What your AI can do with MailTester Email Verification
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “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.”
“Use “get_credit_balance”: Get the current credit balance and a short usage summary for the account.”
“Use “list_lists”: List the user's bulk verification lists/jobs, most recent first.”
“Use “get_list”: Get the details of a single bulk verification list by its id.”
How secure is the MailTester Email Verification MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how MailTester Email Verification holds up.
Security grade B
gate scanned 9 tools on Oct 11, 2026. A few things are worth a look before you connect.
- mediumget_api_key: References secrets or data exfiltration
Official endpoint
Operated by MailTester Email Verification (mailtester.com) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If MailTester Email Verification adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick MailTester Email Verification
Choose MailTester Email Verification in the gate directory. No sign-in needed.
Use it anywhere
MailTester Email Verification's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools MailTester Email Verification exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
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
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
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 ema
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_i
+ 1 more tools once connected
Who runs the MailTester Email Verification MCP server?
The MailTester Email Verification MCP server at a glance
https://app.mailtester.com/mcpQuestions, answered
Is there an official MailTester Email Verification MCP server?
Yes — MailTester Email Verification operates its own remote MCP server at app.mailtester.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect MailTester Email Verification to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick MailTester Email Verification in the directory. No account or sign-in is needed. From then on, MailTester Email Verification's tools are available in every client you've connected to gate.
Do I need to host anything?
No. MailTester Email Verification runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the MailTester Email Verification MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect MailTester Email Verification in minutes. No credit card required.
Connect more than just MailTester Email Verification
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up MailTester Email Verification in: Claude · Claude Code · ChatGPT · Cursor · VS Code
Give your AI MailTester Email Verification — safely.
One URL. All MCPs. Full control. Free to start.
Get started free