bots.st/mailtester-email-verification
MailTester Email Verification
Verify email deliverability and risk
2344 ms
answered our call
- State
- Answered
- Protocol
- MCP 2025-06-18
- Tools listed
- 9
- Answered
- 3 of the last 3 calls
How to reach it
- MCP, HTTP
https://app.mailtester.com/mcp
What it can do
| Tool | What it says it does |
|---|---|
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. |
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 result means. |
get_api_key | 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 | Get the progress and status of a bulk verification list/job by id. |
get_credit_balance | Get the current credit balance and a short usage summary for the account. |
get_list | Get the details of a single bulk verification list by its id. |
list_lists | List the user's bulk verification lists/jobs, most recent first. |
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. |
verify_email | Verify the deliverability of a single email address. Returns a verdict (valid, invalid, risky, unknown). Costs 1 credit. |
In its maker's words
Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.
- Website
- app.mailtester.com/agent-gateway
- Source
- github.com/mailtester-com/mailtester-mcp
- Publisher
- mailtester.com
- Listed from
- the official MCP Registry as
com.mailtester/email-verification - Version
- 1.0.1, updated 8 Oct 2026
- Kinds of work
- Messaging and support, Security and trust
The domain it lives on
- mailtester.com
- registered 14 Jun 2000 (26 years ago), at GoDaddy.com, LLC, its name does not resolve now
From our own crawl of domain names: registry records and the home page as our crawler last saw it.
Every call we made
| When | What happened | Time |
|---|---|---|
| Answered | 2344 ms | |
| Answered | 2491 ms | |
| Answered | 872 ms |
Next door
- Inbin: email for AI agentsDisposable inboxes for agent email verification
- AgentLairEmail delegation via inbox and vault
- Mailrith Email MarketingManage email subscribers, broadcasts, and automations with r
- faxforagents-mcpSend and receive faxes with approval
- AnyHookManage webhook inboxes for agent events
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