RDAP API

Connect it to your AI

Claude Code

claude mcp add --transport http rdap https://rdapapi.io/mcp/rdap

Claude, ChatGPT, Cursor and other apps

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

https://rdapapi.io/mcp/rdap

This server expects extra headers, usually an API key from its maker.

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

{
  "mcpServers": {
    "rdap": {
      "url": "https://rdapapi.io/mcp/rdap"
    }
  }
}

Tools it offers

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

• domain-lookupLook up normalized RDAP registration data (registrar, status, dates, nameservers, contacts) for a domain name.
• bulk-domain-lookupLook up normalized RDAP registration data for several domain names in one pooled call. Requires a Pro or Business plan; every domain in the batch counts against the quota.
• ip-lookupLook up normalized RDAP allocation data (network range, holder, country, status, geofeed URL) for an IP address or CIDR block.
• asn-lookupLook up normalized RDAP data (holder, country, status, registration dates) for an autonomous system number.
• nameserver-lookupLook up normalized RDAP data (IP addresses, status, sponsoring registrar) for a nameserver hostname.
• entity-lookupLook up normalized RDAP data for an RIR entity handle — an organization or contact identifier such as "GOGL" or "ORG-RIEN1-RIPE". Only ARIN, RIPE, APNIC, LACNIC and AFRINIC handles resolve; a domain's registrar or regist
• tldsList the TLDs this API can query, or describe one: which RDAP server answers for it, since when it has been supported, and how often that server fills each field. Metadata, so it never counts against the monthly quota.

Questions