MailTester

Name: MailTester
Author: Edustria V.O.F.

AgentA2AMCP

Email address verification for AI agents: valid / invalid / risky / unknown verdicts with MX, SMTP mailbox, catch-all, disposable and role-account signals. Self-service API key, no human account, 25 free verifications per day.

by Edustria V.O.F.repository ↗homepage ↗v1.0.0

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Observed by Wellknown

Evidence

Everything here was measured by our prober or read from a registry. Nothing is self-reported.

30-day availability36/36 checks ok

when	check	result	http	latency	detail
6 h ago	mcp initialize	ok	200	102 ms	server MailTester 1.0.0 · protocol 2025-06-18 · 9 tools
12 h ago	mcp initialize	ok	200	97 ms	server MailTester 1.0.0 · protocol 2025-06-18 · 9 tools
18 h ago	mcp initialize	ok	200	109 ms	server MailTester 1.0.0 · protocol 2025-06-18 · 9 tools
25 h ago	mcp initialize	ok	200	69 ms	server MailTester 1.0.0 · protocol 2025-06-18 · 9 tools
31 h ago	mcp initialize	ok	200	94 ms	server MailTester 1.0.0 · protocol 2025-06-18 · 9 tools
2 d ago	mcp initialize	ok	200	78 ms	server MailTester 1.0.0 · protocol 2025-06-18 · 9 tools
2 d ago	mcp initialize	ok	200	85 ms	server MailTester 1.0.0 · protocol 2025-06-18 · 9 tools
2 d ago	mcp initialize	ok	200	67 ms	server MailTester 1.0.0 · protocol 2025-06-18 · 9 tools
2 d ago	mcp initialize	ok	200	99 ms	server MailTester 1.0.0 · protocol 2025-06-18 · 9 tools
3 d ago	mcp initialize	ok	200	134 ms	server MailTester 1.0.0 · protocol 2025-06-18 · 9 tools

Tools observed via MCP handshake

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
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, greyliste
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 a
get_batch_status — Get the progress and status of a bulk verification list/job by id.

Declared by sources

What the publisher says

Attributed to the source that supplied each field. Treated as claims, not facts.

No long description beyond the summary.

emailverificationdeliverabilitylist cleaning

Declared skills

Verify one email address — Returns valid, invalid, risky or unknown for a single address.
Verify a small batch — Verifies up to 25 addresses per call and returns per-email verdicts.

kind A2A Agent Card

name A2A Agent Card

repoUrl Official MCP Registry

summary A2A Agent Card

version A2A Agent Card

description A2A Agent Card

homepageUrl A2A Agent Card

publisherUrl A2A Agent Card

publisherName A2A Agent Card

Provenance

Where this record came from

Every source is kept verbatim. Field changes are logged as events.

A2A Agent Cardhttps://app.mailtester.com/.well-known/agent.json

first seen 10 d ago · fetched 10 d agoopen ↗

A2A Agent Cardhttps://mailtester.com/.well-known/agent.json

first seen 10 d ago · fetched 10 d agoopen ↗

Official MCP Registrycom.mailtester/email-verification

first seen 10 d ago · fetched 19 h agoopen ↗

Field history (12 recent events)

10 d ago · declared · protocols → ["a2a","mcp"]
10 d ago · declared · kind → "agent"
10 d ago · declared · name → "MailTester"
10 d ago · declared · summary → "Email address verification for AI agents: valid / invalid / risky / unknown verdicts with MX, SMTP mailbox, catch-all,
10 d ago · declared · description → "Email address verification for AI agents: valid / invalid / risky / unknown verdicts with MX, SMTP mailbox, catch-all,
10 d ago · declared · publisherName → "Edustria V.O.F."
10 d ago · declared · publisherUrl → "https://mailtester.com"
10 d ago · declared · version → "1.0.0"
10 d ago · declared · description → "Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key."
10 d ago · declared · publisherName → "com.mailtester"
10 d ago · declared · homepageUrl → "https://app.mailtester.com/agent-gateway"
10 d ago · declared · repoUrl → "https://github.com/mailtester-com/mailtester-mcp"

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Evidence

What the publisher says

Capabilities

Where this record came from