WHOIS output is notoriously ragged across registrars, so the useful part here is the fixed envelope: a status code the assistant can check before it tries to read anything. That makes it usable inside a longer chain — verify the domain exists, then go on — rather than only as a lookup you read yourself.
A single-purpose WHOIS lookup server built on FastMCP, backed by the Chinaz API. Give it a domain and it returns the registration record in a fixed JSON envelope with a code, a message and the data — so an assistant can check ownership, registrar and expiry without you opening a lookup site.
- `whois_query` takes a domain such as `example.com` and returns its WHOIS record
- A consistent response envelope — `code`, `message` and `data` — so failures are distinguishable from empty results
- Input validation on the domain before the request goes out
- Both stdio and SSE transports
Python 3.8+ and `pip install whois-mcp-server` (package `whois-mcp-server`, version 0.1.0), then run the `whois-mcp-server` command or launch it with `uvx`. It queries through the Chinaz API, and the README has you export the key as `TAVILY_API_KEY` — an oddity worth knowing before you wonder why nothing resolves.
One command plus a key — pip install whois-mcp-server, then supply credentials