MCP server

RDAP API Official

io.rdapapi/rdap

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

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

Website

At a glance

Type

MCP server

Publisher

rdapapi.io (verified by the MCP Registry)

Status

Working at last check

Tools

7

Token cost

About 1,152 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.rdap]
url = "https://rdapapi.io/mcp/rdap"

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"rdap":{"type":"http","url":"https://rdapapi.io/mcp/rdap"}}}

Antigravity

agy mcp add rdap https://rdapapi.io/mcp/rdap

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"rdap","server_url":"https://rdapapi.io/mcp/rdap","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"rdap","server_url":"https://rdapapi.io/mcp/rdap"}

Tools

• asn-lookup ~89 tokens
  Look up normalized RDAP data (holder, country, status, registration dates) for an autonomous system number.
• bulk-domain-lookup ~273 tokens
  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-lookup ~223 tokens
  Look up normalized RDAP registration data (registrar, status, dates, nameservers, contacts) for a domain name.
• entity-lookup ~139 tokens
  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.
• ip-lookup ~132 tokens
  Look up normalized RDAP allocation data (network range, holder, country, status, geofeed URL) for an IP address or CIDR block.
• nameserver-lookup ~86 tokens
  Look up normalized RDAP data (IP addresses, status, sponsoring registrar) for a nameserver hostname.
• tlds ~210 tokens
  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.

Browse

• Domains and DNS

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