scan.mx Email Diagnostics
Email deliverability check: MX, SPF, DKIM, DMARC, blacklists, MTA-STS, DNSSEC, BIMI. Graded, no key.
Connect it
Settings → Connectors → Add custom connector
URL: https://api.scan.mx/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://api.scan.mx/mcp{
"mcpServers": {
"diagnostics": {
"url": "https://api.scan.mx/mcp"
}
}
}claude mcp add --transport http diagnostics https://api.scan.mx/mcp{
"servers": {
"diagnostics": {
"type": "http",
"url": "https://api.scan.mx/mcp"
}
}
}9 tools, verified live
check_domainread-onlyRun 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 "pendi
check_mxread-onlyCheck the MX records of a domain: presence, hostnames, resolution, null-MX, and common misconfigurations.
check_spfread-onlyCheck the domain SPF policy: presence, syntax, the all qualifier, and the 10-lookup limit.
check_dmarcread-onlyCheck the domain DMARC policy at _dmarc: presence, policy strength (none/quarantine/reject), and reporting.
check_blacklistread-onlyCheck whether the domain and its mail server IPs are listed on the Spamhaus (ZEN, DBL, ZRD, AuthBL), SpamCop, GBUdb and PSBL blocklists.
check_mta_stsread-onlyCheck the domain MTA-STS policy (_mta-sts TXT and the HTTPS policy file, mode and MX coverage) and its TLS-RPT reporting record.
check_dnssecread-onlyCheck DNSSEC validation and DNS health: delegation, nameserver count, SOA, and reverse DNS of the mail servers.
check_bimiread-onlyCheck the domain BIMI record at default._bimi: the SVG logo URL, the VMC/CMC certificate, and the DMARC enforcement BIMI needs.
check_dkimread-onlyCheck 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.
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