x402 DNS Email Auth Checker MCP Server

by workers-microtools-x402-x402-dns-auth-checker Your server? Claim it

answering

x402 DNS Email Auth Checker is answering right now. Last checked 10 min ago. It exposes 2 tools. Last commit 17 Oct 2026.

Audit SPF, DKIM, DMARC, MX, BIMI, MTA-STS for a domain; score + grade. $0.003 USDC/call via x402.

Uptime history 8 days of history

8 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

1046 ms

Response time

average over 24h

Stars

last commit 17 Oct 2026

Nothing serious here today

Today is the operative word: we check x402 DNS Email Auth Checker every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add dns-auth-checker --transport http https://x402-dns-auth-checker.microtools-x402.workers.dev/mcp

Settings → Connectors → Add custom connector, then paste this address

https://x402-dns-auth-checker.microtools-x402.workers.dev/mcp

~/.codex/config.toml

[mcp_servers.dns-auth-checker]
url = "https://x402-dns-auth-checker.microtools-x402.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "dns-auth-checker": {
      "url": "https://x402-dns-auth-checker.microtools-x402.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "dns-auth-checker": {
      "type": "http",
      "url": "https://x402-dns-auth-checker.microtools-x402.workers.dev/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

domain

domain_auth_check

Audit a domain's email authentication DNS: SPF (record count, all qualifier, includes, ~DNS lookups vs 10 limit), DMARC (p, sp, pct, rua/ruf, adkim/aspf), DKIM (common or given selectors, key type and length), MX, plus BIMI / MTA-STS / TLS-RPT presence. Returns per-check status, issues, recommendations, score 0-100 and grade A-F. Costs $0.003 USDC per call via x402.

health

health

Free health check. Returns service status, price and network.

Endpoints

URL	Transport	State	Latency	Checked
https://x402-dns-auth-checker.microtools-x402.workers.dev/mcp	streamable-http	answering	1064 ms	10 min ago

Alternatives to x402 DNS Email Auth Checker

same job, measured the same way

DnsGuard

by workers-mike-tusa-dnsguard

Check a domain's email authentication: SPF, DKIM, DMARC, BIMI, MX, MTA-STS, TLS-RPT. Score + fixes.

1 tools answering

Email Auth Checker

by workers-quietworklabs-email-auth-check

SPF, DKIM, DMARC, MTA-STS and domain-expiry checks for any domain, with SPF lookup counts.

4 tools answering

Deliverability Doctor

by integrity-os

Check if a domain can be email-spoofed: SPF, DMARC, DKIM, MX graded from public DNS. Authless.

2 tools answering

Mail Security Tools

by mailsecuritytools-api

DMARC/SPF/DKIM/MX checks, email score, 100-domain bulk score, webhook watch alerts (x402 USDC).

7 tools answering

Palisade

by palisade

Monitor and manage email authentication (SPF, DKIM, DMARC, MTA-STS, BIMI) for your domains.

101 installs/wk answering

Email Deliverability

by inboxguard

Scan and fix a domain's email deliverability (SPF, DKIM, DMARC, MTA-STS, BIMI, DNS blocklists).

28 tools answering

MCP Domain Deliverability Checker

by mambabuilt

Audit a domain email deliverability via Apify: SPF, DKIM, DMARC, MX, blacklist, catch-all, age.

229 installs/wk local only

DomainRef - domain and email security check

by domainref

Pay-per-call domain and email security check: SPF, DKIM, DMARC, TLS, DNSSEC, BIMI, with exact fixes.

2 tools answering

x402 DNS Email Auth Checker — questions

Answers built from our own checks of this server.

What can x402 DNS Email Auth Checker do?

It exposes 2 tools, read directly from the server on our last check. Among them: domain_auth_check, health. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is x402 DNS Email Auth Checker working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 1046 ms. The bar chart above shows every period we have measured.

How do I connect x402 DNS Email Auth Checker?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does x402 DNS Email Auth Checker need an API key?

No. x402 DNS Email Auth Checker completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is x402 DNS Email Auth Checker?

It answers our handshake in 1046 ms on average, which is faster than 4% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is x402 DNS Email Auth Checker open source?

The code is open source: it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at x402-dns-auth-checker.microtools-x402.workers.dev, which runs on its operator's own terms.