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RDAP API MCP Server

by rdapapi Your server? Claim it
answering

RDAP API is answering right now. Last checked 15 min ago. It exposes 7 tools.

Normalized JSON for any domain across 1,200+ TLDs, reading WHOIS where no RDAP server exists.

Uptime history 32 days of history · worst day 78%
32 days agonow
91.2%
Uptime 24h
83 of 91 checks
7
Tools
read from the server
226 ms
Response time
average over 24h
open, no key
Access
streamable-http

What changed 5

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 2 September 2026. No other catalogue keeps this.

12 Sep a tool description was rewritten ip-lookup
3 Sep a tool changed version
2 Sep 3 tools changed the parameters they ask for bulk-domain-lookup, domain-lookup, tlds

RDAP API does not always answer

Over the last week it answered 98.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 15 min ago.

run in your terminal
claude mcp add rdap --transport http https://rdapapi.io/mcp/rdap
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "rdap": {
      "url": "https://rdapapi.io/mcp/rdap"
    }
  }
}
~/.codex/config.toml
[mcp_servers.rdap]
url = "https://rdapapi.io/mcp/rdap"
.cursor/mcp.json
{
  "mcpServers": {
    "rdap": {
      "url": "https://rdapapi.io/mcp/rdap"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "rdap": {
      "url": "https://rdapapi.io/mcp/rdap"
    }
  }
}

Available tools 7

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

asn
asn-lookup
Look up normalized RDAP data (holder, country, status, registration dates) for an autonomous system number.
bulk
bulk-domain-lookup
Look 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.
domain
domain-lookup
Look up normalized RDAP registration data (registrar, status, dates, nameservers, contacts) for a domain name.
entity
entity-lookup
Look 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.
lookup
ip-lookup
Look up normalized RDAP allocation data (network range, holder, country, status, geofeed URL) for an IP address or CIDR block.
nameserver
nameserver-lookup
Look up normalized RDAP data (IP addresses, status, sponsoring registrar) for a nameserver hostname.
tlds
tlds
List 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.

Endpoints

URLTransportStateLatencyChecked
https://rdapapi.io/mcp/rdap streamable-http answering 398 ms 15 min ago

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RDAP API — questions

Answers built from our own checks of this server.

What can RDAP API do?
It exposes 7 tools, read directly from the server on our last check. Among them: asn-lookup, bulk-domain-lookup, domain-lookup, entity-lookup, ip-lookup, nameserver-lookup and 1 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is RDAP API working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 83 of 91 checks got a reply (91.2%), average response time 226 ms. The bar chart above shows every period we have measured.
How do I connect RDAP API?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does RDAP API need an API key?
No. RDAP API completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 7 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is RDAP API?
It answers our handshake in 226 ms on average, which is faster than 70% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.