DC5 WHOIS

Connect it to your AI

Claude Code

claude mcp add --transport http dc5-whois https://whois.dc5.tech/mcp

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://whois.dc5.tech/mcp

Cursor, VS Code and other apps (mcp.json)

{
  "mcpServers": {
    "dc5-whois": {
      "url": "https://whois.dc5.tech/mcp"
    }
  }
}

Tools it offers

8 tools, as the server itself reported during our check on Oct 31, 2026.

• check_aspa_pathCheck an AS_PATH against the published ASPA objects (RPKI attestations of which providers a network authorises), following the verification procedure of draft-ietf-sidrops-aspa-verification. The result is valid, invalid
• check_lookalikeCheck whether one domain or Web3 name is a visual look-alike (homograph): letters from different scripts mixed in one label, or every non-ASCII letter having a Latin twin, so раураl.com reads as paypal.com. Returns the s
• check_mail_securityGrade one domain's email authentication and list every check: SPF (single record, the 10 DNS-lookup limit across includes, the all qualifier), DMARC (policy, inheritance from the organizational domain, pct, report addres
• check_routeCheck one (prefix, origin AS) pair against the public records: RPKI route origin validation (RFC 6811), the routing registries (IRR route objects) and how many RIPE RIS peers see that origin for the prefix. Use it to ans
• get_tld_infoFacts about one top-level domain from local datasets: whether it is delegated in the root zone, its type (country-code or infrastructure when derivable), the registry's RDAP server, root-zone name servers, whether the ro
• list_data_sourcesList the local datasets and feeds behind lookup_target (RIR delegations, IANA, Public Suffix List, cloud / CDN ranges, Tor and Private Relay, reputation lists, GeoLite2) with state, record count, generation date and a st
• lookup_manyLook up up to 10 domains, IPs, CIDRs, ASNs or Web3 names in one call and get one short line per target (type, registrar and expiry, nameservers, network owner, origin AS, cloud, reputation, Web3 status) plus the same fac
• lookup_targetLook up one domain, IP address, CIDR block, ASN (AS15169), EVM address (0x…) or Web3 name (ENS .eth, Unstoppable, SPACE ID .bnb, Handshake hns:) and get a compact fact sheet. Domains: registrar, dates, status, nameserver

Questions