"A server for building out n8n from scratch" matching MCP connectors:

Check internet providers, plans, speeds, and known pricing at a specific U.S. street address.

Email posture for any domain: can it receive mail, can it be spoofed? MX, SPF and DMARC.

Live DNS lookups for agents: A/MX/TXT/SPF/CNAME/PTR with TTLs and DNSSEC, via Google Public DNS.

Free uptime monitoring: HTTP/TCP/TLS/DNS + MCP server checks, cron heartbeats, status pages, alerts.

DNS and email security scanner with 76 MCP tools for SPF, DMARC, DNSSEC, SSL, and brand audits.

Vendor status pages, TLS cert inspection, DNS propagation checks, and incident-response playbooks.

IPInfo MCP — wraps ipinfo.io (free tier, no auth required for basic usage)

Internet identity for AI agents: register or broker domains, email, DNS - pay by card or USDC.

Query WHOIS/RDAP information for domains, IP addresses, CIDR prefixes and ASNs. Self-hostable.

Normalized JSON for any domain across 1,200+ TLDs. The modern WHOIS replacement.

DNS and email security: check SPF, DKIM, DMARC, DNSSEC, DANE and build the records. 45 tools.

Stateful WebSocket session registry with per-connection Shannon entropy delta tracking for schema di

Calculates IPv4 subnet information from an IP address and CIDR prefix or dotted decimal subnet mask

Custom domains API for SaaS: connect, verify, and manage customer domains, SSL, and DNS

Free anonymous website, DNS, email and TLS checks, plus read-only access to your monitors.

Monitoring for agencies — uptime, SSL, DNS, blocklists, AI visibility, MCP health. 8 no-auth tools.

IP Lookup MCP — ip-api.com (free, no auth for basic usage)

Domain & company intel for AI agents: RDAP, DNS, email deliverability, tech stack. No API keys.

Read devices, users, keys, ACLs and DNS for a tailnet; manage devices, routes and auth keys.

The web capability layer for AI agents: render, extract, DNS, SSL, WHOIS & more via x402.