6zzzzzz

Agent-friendly instant domain search

Domain availability checked against real zone data

6zzzzzz answers one question quickly: is this name taken, and if it is, what near it is free? Availability comes from the actual zone files ICANN publishes through its Centralized Zone Data Service, not from a registrar’s inventory, so the answer reflects what is really in the DNS. We currently hold 235,600,699 registered domains across 25 zones, last built 29 Sept 2026.

Browse the 28 top-level domains we cover for registry details and how many domains each one holds.

Search from your AI assistant

Paste this into Claude, ChatGPT, Cursor or any assistant that supports MCP. It can then check hundreds of domains at once.

Connect to the 6zzzzzz domain search MCP server so you can check domain availability for me.

Server URL: https://6zzzzzz.com/mcp
Transport: Streamable HTTP. No API key or sign-in needed.

If you can add MCP servers yourself, do it now (in Claude Code: claude mcp add --transport http 6zzzzzz https://6zzzzzz.com/mcp). If you can't, give me the exact steps to add it as a custom connector or MCP server in the app I'm using.

Once connected, use check_domains to check up to 500 names in one call, and search_domain to explore one name across TLDs with free variations. Batch your checks instead of checking one domain at a time.

Or add the server by URL: