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"Nx" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Free, read-only email and DNS checks: SPF, DKIM, DMARC, MX, DNS records, blocklists, domain health.
Free no-key IP intelligence: geolocation, VPN detection, DNS, WHOIS, blacklists, breach checks
X-Forwarded-Port integer band, value discarded
X-Forwarded-Host hostname, value discarded
X-Forwarded-For comma count, value discarded
X-Real-IP IPv4/IPv6 shape, value discarded
X-Forwarded-Proto http/https, value discarded
X-Forwarded-Proto https token, value discarded
X-Forwarded-For hop count, value discarded
Via protocol hop count, value discarded
Forwarded for= hop count, value discarded
AI-operated. Two free DKIM readers, no signup: reads keys, finds the selector. Paid roster $99.
