email_domain_health_check
ActiveTool of gapup-mcp
Comprehensive email domain health check: MX routing, SPF authentication, DKIM signing, DMARC policy enforcement, DNSBL blacklist status (Spamhaus/SpamCop/Barracuda), TLS certificate validity, and WHOIS registration age. Aggregates a reputation score 0-100 and generates P0/P1/P2 deliverability signals. Accepts a domain (stripe.com) or email address (info@stripe.com). Detects role-based addresses (info@, support@, admin@, noreply@) that have higher bounce rates. Detects email provider (Google Workspace, Microsoft 365, Amazon SES, etc.). P0 signals: blacklisted / no MX / TLS expired / no SPF + DMARC none. P1 signals: SPF soft-fail / no DKIM selector / DMARC no reporting. P2 signals: role-based address / TLS expires <30d / domain age <90 days. All checks are keyless (no API keys required). Cache TTL 1h. SLA <=10s p95.
Parameters schema
{
"type": "object",
"required": [
"domain"
],
"properties": {
"async": {
"type": "boolean",
"description": "If true, returns a job_id immediately (<200ms) instead of waiting for the result. Poll the result with job_result(job_id). Use for slow tools to avoid client timeouts."
},
"email": {
"type": "string",
"maxLength": 320,
"description": "Full email address for additional checks: format validity, role-based detection (e.g. \"ceo@stripe.com\")."
},
"checks": {
"type": "array",
"items": {
"enum": [
"mx",
"spf",
"dkim",
"dmarc",
"blacklist",
"whois",
"tls",
"reputation"
],
"type": "string"
},
"description": "Subset of checks to run. Defaults to all 8: [\"mx\",\"spf\",\"dkim\",\"dmarc\",\"blacklist\",\"whois\",\"tls\",\"reputation\"]. Use a subset for faster responses (e.g. [\"mx\",\"spf\",\"dmarc\",\"reputation\"] for quick scoring)."
},
"domain": {
"type": "string",
"maxLength": 253,
"minLength": 3,
"description": "Domain to check (e.g. \"stripe.com\" or \"@stripe.com\"). If an email address is provided here, the domain is extracted automatically."
}
}
}Parent server
gapup-mcp
https://github.com/getgapup/gapup-mcp-public
2/7 registries