"CAE Key for Electronic Invoicing in Argentina" matching MCP connectors:

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

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

DNS and email security scanner with 80 MCP tools for SPF, DMARC, DNSSEC, SSL, and brand audits.

Free no-key IP intelligence: geolocation, VPN detection, DNS, WHOIS, blacklists, breach checks

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

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

GreyNoise Community MCP — internet scanner classification (free tier with key)

DNS, WHOIS/RDAP, DMARC/SPF, LEI, sitemap, web extract, VAT, QR. Paid per call in USDC, no signup.

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

OpenCellID MCP — cell tower geolocation database (free with key)

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

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

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

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

Domain attribution and correlation for AI agents, with confidence and per-signal evidence.

MCP server for DNSimple — domains, DNS zone records, availability, pricing and contacts.

Check email deliverability for a domain: MX, SPF, DKIM, DMARC, blacklists. Graded, no key.

DMCA takedown & host reveal for AI agents: who hosts an infringing URL, even behind Cloudflare.

Scan the open TCP ports of your own public IP. Fast (32) or deep (65535). No key, no signup.

SIP/VoIP/telecom grounding for AI agents: vendor docs, RFCs, STIR/SHAKEN, traces, configs.