@pipeworx/public-suffix-list

Public Suffix List MCP — the Mozilla-maintained catalog of effective TLDs (e.g. co.uk, s3.amazonaws.com, github.io). Used by browsers to decide cookie-domain boundaries. Keyless; cached 24h in-pack.

Part of Pipeworx — an MCP gateway connecting AI agents to 1394+ live data sources.

Tools

• parse(domain) — split a domain into (subdomain, registrable_domain, public_suffix)

• public_suffix(domain) — just the public suffix

• registrable_domain(domain) — domain + nearest suffix (the "site")

• list_version() — list refresh time + line count

Related MCP server: url-ai-mcp

Data source

https://publicsuffix.org/list/public_suffix_list.dat

Quick Start

Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):

{
  "mcpServers": {
    "public-suffix-list": {
      "url": "https://gateway.pipeworx.io/public-suffix-list/mcp"
    }
  }
}

Or connect to the full Pipeworx gateway for access to all 1394+ data sources:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://gateway.pipeworx.io/mcp"
    }
  }
}

Using with ask_pipeworx

Instead of calling tools directly, you can ask questions in plain English:

ask_pipeworx({ question: "your question about Public Suffix List data" })

The gateway picks the right tool and fills the arguments automatically.

More

• Docs and guides

• pipeworx.io

License

MIT