SPF, DKIM and DMARC Checker for Email Authentication
Free email authentication scanner, no key or signup. Checks SPF, DKIM, DMARC, MX, DNSSEC, blacklists and runs a live SMTP probe on any domain.
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https://scan.mx/https://api.scan.mx/mcpLast probed Nov 3, 2026 · api.scan.mx
6tools discovered
Full email deliverability check
Run the full email and DNS deliverability check for a domain: MX, SPF, DKIM, DMARC, DNS health, provider detection, and…
Check MX records
Check the MX records of a domain: presence, hostnames, resolution, null-MX, and common misconfigurations.
Check SPF
Check the domain SPF policy: presence, syntax, the all qualifier, and the 10-lookup limit.
Check DMARC
Check the domain DMARC policy at _dmarc: presence, policy strength (none/quarantine/reject), and reporting.
Check blacklists
Check whether the domain and its mail server IPs are listed on the Spamhaus (ZEN, DBL, ZRD, AuthBL), SpamCop, GBUdb and…
Check DKIM
Check DKIM signing keys for a domain.
Schemas and invoke metadata: Directory API
Get your MCP into directories
A working endpoint is step one. Directory coverage is the coordinated launch across ChatGPT, Claude, Cursor, the MCP Registry, and community indexes.
Directory coverage for brandsFree email authentication scanner, no key or signup. Checks SPF, DKIM, DMARC, MX, DNSSEC, blacklists and runs a live SMTP probe on any domain.
Use the MCP endpoint listed on this page in your MCP client configuration. One-click install pills support Claude, Cursor, VS Code, and other hosts. Copy the remote MCP URL if your client needs a manual entry.
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MCPBundles probed 6 tools on the live server. The tool list on this page reflects what was discovered at the last refresh — connect your client to see the full set available to your session.
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