Domains

mcp-domains

Domains MCP — domain registration lookup + availability search over live RDAP (ICANN standard, keyless). We own this end-to-end — no dependency on gated third-party domain APIs. Availability queries the AUTHORITATIVE registry RDAP server per TLD (resolved via the IANA bootstrap), not the flaky rdap.

Part of Pipeworx — an MCP gateway connecting AI agents to 1878+ live data sources. This is an independent, unofficial integration — not affiliated with, endorsed by, or published by the upstream provider.

Tools

Tool	Description
domain_lookup	Get full registration details for a domain. Returns registrar, registrant, registration/expiration dates, nameservers, DNSSEC status, and domain status flags. Works for any TLD.
domain_status	Quick check if a domain is registered or available. Returns registration status and expiration date if registered.
check_availability	Check whether a name is available to register across MULTIPLE TLDs at once — the domain-hunting tool. Pass a base name ("acme") and get .com/.io/.ai/.co/.net/.org/.app/.dev checked in one call (or pass your own tlds list). For each: available true/false (+ expiration if taken). Use for "is X available", "find an open domain for my project", "which TLDs is X free on". Single-domain detail is domain_status; this is the bulk/brainstorm version.
find_available_domains	Search for AVAILABLE domain names to register from a keyword — the domain name search / brainstorming tool. Pass a keyword ("acme") and get back which domains are actually free to register: the exact name across .com/.io/.ai/.co/.app/.dev, plus creative variations (getacme.com, acmehq.com, tryacme.io, acmeapp.com, …). Use for "find me an available domain for X", "domain name ideas for my startup", "is there an open domain for X", "suggest domain names". Returns available domains ranked (exact match + .com first). Availability is a live registry (RDAP) signal, keyless. For a single specific domain use domain_status; to check one name across TLDs without variations use check_availability.
certificate_search	Find the SSL/TLS certificates issued for a domain from public Certificate Transparency logs (Cert Spotter). PREFER OVER WEB SEARCH for "what certificates does X have", "find subdomains of X", "when does X's TLS cert expire", "which CA issued X's cert". With include_subdomains it also ENUMERATES SUBDOMAINS seen in CT logs (asset/attack-surface discovery). Returns each cert's DNS names, issuing CA, validity window, and revocation status, plus a deduplicated list of all discovered hostnames. Keyless.

Quick Start

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

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

What this endpoint actually serves

tools/list at https://gateway.pipeworx.io/domains/mcp returns the tools in the table above plus the shared Pipeworx meta-tools — ask_pipeworx, discover_tools, search_within, remember/recall and the rest of the gateway-wide set. So the tool count you see is larger than this table: a single-pack endpoint currently lists roughly 30 shared tools alongside the pack's own. The connection's initialize response states its exact scope, and is the authoritative answer for a given day.

This is deliberate, not multiplexing by accident. The meta-tools are what let a scoped connection answer a question this pack does not cover — via ask_pipeworx, which routes across the whole catalog — without you adding a second MCP server. There is currently no way to mount a pack endpoint without them; if the extra schemas cost you more context than the routing is worth, connect to the full gateway once rather than to several pack endpoints.

Or connect to the full Pipeworx gateway to get every pack's tools listed directly, instead of just this one's:

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

Both URLs reach the same gateway and the same 1878+ data sources. The only difference is which pack's tools are listed directly; ask_pipeworx reaches all of them from either one.

No MCP client? Call it over HTTP

curl -X POST https://gateway.pipeworx.io/v1/tools/domain_lookup \
  -H 'Content-Type: application/json' \
  -d '{"domain":"google.com"}'

No account needed for the first calls. Inspect any tool: GET https://gateway.pipeworx.io/v1/tools/domain_lookup. Find one: POST https://gateway.pipeworx.io/v1/tools/search_packs with {"query":"..."}.

Standalone (no gateway account)

This package also runs as a local stdio MCP server — no Pipeworx account, no gateway round-trip:

{
  "mcpServers": {
    "domains": {
      "command": "npx",
      "args": ["-y", "@pipeworx/mcp-domains"]
    }
  }
}

Or run it directly to confirm it starts:

npx -y @pipeworx/mcp-domains

It speaks MCP over stdin/stdout and answers initialize/tools/list/tools/call for only this pack's tools — none of the shared meta-tools the gateway connection above adds. Same source, same tools, no ask_pipeworx routing.

Using with ask_pipeworx

Instead of calling tools directly, you can ask questions in plain English — this works on the pack endpoint above as well as on the full gateway:

ask_pipeworx({ question: "your question about Domains data" })

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

More

• Docs and guides
• pipeworx.io

License

MIT