scan.mx Email Diagnostics MCP Server

by scan Your server? Claim it

answering

scan.mx Email Diagnostics is answering right now. Last checked 10 min ago. It exposes 9 tools.

Email deliverability check: MX, SPF, DKIM, DMARC, blacklists, MTA-STS, DNSSEC, BIMI. Graded, no key.

Uptime history 91 days of history · worst day 93%

91 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

228 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 4

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 18 August 2026. No other catalogue keeps this.

13 Oct 3 tools appeared check_bimi, check_dnssec, check_mta_sts

17 Aug a tool description was rewritten check_domain

Nothing serious here today

Today is the operative word: we check scan.mx Email Diagnostics 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 diagnostics --transport http https://api.scan.mx/mcp

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

https://api.scan.mx/mcp

~/.codex/config.toml

[mcp_servers.diagnostics]
url = "https://api.scan.mx/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "diagnostics": {
      "url": "https://api.scan.mx/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "diagnostics": {
      "type": "http",
      "url": "https://api.scan.mx/mcp"
    }
  }
}

Available tools 9

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

bimi

check_bimi

Check the domain BIMI record at default._bimi: the SVG logo URL, the VMC/CMC certificate, and the DMARC enforcement BIMI needs.

blacklist

check_blacklist

Check whether the domain and its mail server IPs are listed on the Spamhaus (ZEN, DBL, ZRD, AuthBL), SpamCop, GBUdb and PSBL blocklists.

check

check_mx

Check the MX records of a domain: presence, hostnames, resolution, null-MX, and common misconfigurations.

dkim

check_dkim

Check DKIM signing keys for a domain. Without a selector, common provider selectors are probed. Pass an explicit selector to look up that exact key at selector._domainkey.

dmarc

check_dmarc

Check the domain DMARC policy at _dmarc: presence, policy strength (none/quarantine/reject), and reporting.

dnssec

check_dnssec

Check DNSSEC validation and DNS health: delegation, nameserver count, SOA, and reverse DNS of the mail servers.

domain

check_domain

Run the full email and DNS deliverability check for a domain: MX, SPF, DKIM, DMARC, DNS health, provider detection, and blacklists. Returns a letter grade (A+ to F, where specific weaknesses cap the grade), a 0 to 100 score, and every individual check with its RFC reference. Set include_smtp to also run a live SMTP probe of the mail servers: the probe is non-blocking, so when smtp_status is "pending" or "running" call this tool again (poll_after_seconds hints how long to wait) until smtp_status is "complete" and the SMTP checks appear in checks.

mta

check_mta_sts

Check the domain MTA-STS policy (_mta-sts TXT and the HTTPS policy file, mode and MX coverage) and its TLS-RPT reporting record.

spf

check_spf

Check the domain SPF policy: presence, syntax, the all qualifier, and the 10-lookup limit.

Endpoints

URL	Transport	State	Latency	Checked
https://api.scan.mx/mcp	streamable-http	answering	236 ms	10 min ago

Alternatives to scan.mx Email Diagnostics

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Pipefire email deliverability tools

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scan.mx Email Diagnostics — questions

Answers built from our own checks of this server.

What can scan.mx Email Diagnostics do?

It exposes 9 tools, read directly from the server on our last check. Among them: check_bimi, check_blacklist, check_dkim, check_dmarc, check_dnssec, check_domain and 3 more. 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 scan.mx Email Diagnostics 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 228 ms. The bar chart above shows every period we have measured.

How do I connect scan.mx Email Diagnostics?

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 scan.mx Email Diagnostics need an API key?

No. scan.mx Email Diagnostics completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 9 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is scan.mx Email Diagnostics?

It answers our handshake in 228 ms on average, which is faster than 63% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.