Talk to your registrar.

The URL, for every app:

https://mcp.porkbun.com/mcp

1. Claude, quickest: open Porkbun in the Claude directory and click Connect. That is the no-purchases version (see Choose an endpoint); for everything, add the custom connector as in the next step.
2. Claude (claude.ai, Desktop): Customize → Connectors → + → Add custom connector. Paste the URL, click Add, then Connect, and click Allow Claude on the Porkbun page. In a chat, turn it on from + → Connectors. (Team and Enterprise: an owner adds it under Organization settings → Connectors → Add → Custom → Web; members then click Connect.)
3. ChatGPT: Settings → Security and login → turn on Developer mode. Then Plugins → +, name it Porkbun, paste the URL as a public endpoint, create it, and click Allow ChatGPT on the Porkbun page. In a chat, add it from the tools menu.
4. Claude Code: run the command below, then /mcp, select porkbun, and authenticate in the browser.

claude mcp add --transport http --scope user porkbun https://mcp.porkbun.com/mcp

Any client that supports remote MCP with OAuth works with the bare URL. Each connection is its own API key, listed under API access as “(connected app)”: set its allowed domains to limit it, or disable it to disconnect. It can do what you choose when you sign in (full access, manage but no purchases, or read-only), within your per-domain API access, monthly spend limit and top-up caps. Every tool is available except the sandbox controls. Want an assistant that can't spend money? See Choose an endpoint. Client can't do OAuth? Send your own API key pair as X-API-Key and X-Secret-API-Key headers instead (no IP restriction on that key). Full guide.

claude mcp add porkbun \
  --env PORKBUN_API_KEY=pk1_... \
  --env PORKBUN_SECRET_API_KEY=sk1_... \
  -- npx -y @porkbunllc/mcp-server

{
  "mcpServers": {
    "porkbun": {
      "command": "npx",
      "args": ["-y", "@porkbunllc/mcp-server"],
      "env": {
        "PORKBUN_API_KEY": "pk1_...",
        "PORKBUN_SECRET_API_KEY": "sk1_..."
      }
    }
  }
}

Add this to claude_desktop_config.json. On macOS, Claude Desktop launches with a limited PATH — if npx is not found, use the absolute path that which npx prints.

Cursor, one click: Add Porkbun to Cursor (opens Cursor and adds the hosted server; you sign in with Porkbun on first use, no API key). Or run it locally with your keys:

{
  "mcpServers": {
    "porkbun": {
      "command": "npx",
      "args": ["-y", "@porkbunllc/mcp-server"],
      "env": {
        "PORKBUN_API_KEY": "pk1_...",
        "PORKBUN_SECRET_API_KEY": "sk1_..."
      }
    }
  }
}

Any client that speaks MCP over stdio will work with the same command. Run locally, your keys never leave your machine.

Hand an agent /llms/agent-setup and it will install this server, ask you for scoped credentials, and learn the safety rules on its own.