0n3
MCP servers · RDAP (domain lookup) · MCP server

Connect Codex CLI to RDAP (domain lookup)

One line gives Codex CLI your RDAP (domain lookup) account as tools: 4 endpoints, lookup, more, called with your own connection. No key in the prompt, a receipt for every call, revoke Codex CLI's access alone any time.

Get the line for Codex CLIConnect RDAP (domain lookup) first

Three steps

  1. Create a free 0n3 account and connect RDAP (domain lookup). Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Codex CLI. OpenAI's terminal agent reads 0n3 over Streamable HTTP with a token from your environment.
  3. Ask Codex CLI: whoami. Then: "List customers in RDAP (domain lookup)".
Put the token in your environment
export ON3_TOKEN="<your 0n token>"

Add it to your shell profile so Codex finds it next time.

The line above carries a placeholder; 0n3.app/install mints a real key named for Codex CLI and fills it in.

What Codex CLI can then do in RDAP (domain lookup)

Lookup · Look up a domain, nameserver, IP network or autonomous system0
Look up a domain, nameserver, IP network or autonomous system
More · Everything else this app exposes.4
DomainGET /domain/{domain}
NameserverGET /nameserver/{nameserver}
IpGET /ip/{ip}
AsnGET /autnum/{asn}

RDAP (domain lookup) in other AI clients

Claude Code + RDAP (domain lookup)MCP server + skillClaude (desktop & claude.ai) + RDAP (domain lookup)connectorChatGPT + RDAP (domain lookup)connector · GPT actionGemini CLI + RDAP (domain lookup)MCP serverCursor + RDAP (domain lookup)MCP serverVS Code (Copilot) + RDAP (domain lookup)MCP serverWindsurf + RDAP (domain lookup)MCP server

Codex CLI with other apps

Hostinger363 endpointsTelegram132 endpointsPipedrive95 endpointsResend67 endpointsSquare57 endpointsLinkedIn50 endpointsSlack45 endpointsFigma32 endpointsCloudConvert32 endpointseBay25 endpointsCRM24 endpointsQuickBooks21 endpoints