RDAP API
Normalized JSON for any domain across 1,200+ TLDs, reading WHOIS where no RDAP server exists.
Connect it
Settings → Connectors → Add custom connector
URL: https://rdapapi.io/mcp/rdapSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://rdapapi.io/mcp/rdap{
"mcpServers": {
"rdap": {
"url": "https://rdapapi.io/mcp/rdap",
"headers": {
"Authorization": "<YOUR_AUTHORIZATION>"
}
}
}
}claude mcp add --transport http rdap https://rdapapi.io/mcp/rdap --header "Authorization: <value>"{
"servers": {
"rdap": {
"type": "http",
"url": "https://rdapapi.io/mcp/rdap",
"headers": {
"Authorization": "<YOUR_AUTHORIZATION>"
}
}
}
}7 tools, verified live
domain-lookupread-onlyLook up normalized RDAP registration data (registrar, status, dates, nameservers, contacts) for a domain name.
bulk-domain-lookupread-onlyLook 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-lookupread-onlyLook up normalized RDAP allocation data (network range, holder, country, status, geofeed URL) for an IP address or CIDR block.
asn-lookupread-onlyLook up normalized RDAP data (holder, country, status, registration dates) for an autonomous system number.
nameserver-lookupread-onlyLook up normalized RDAP data (IP addresses, status, sponsoring registrar) for a nameserver hostname.
entity-lookupread-onlyLook 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 registrant comes from domain-lookup instead.
tldsread-onlyList 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.
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