Unique.domains MCP server

Without a tool, an assistant can only guess whether a domain name is taken. This server gives it the record: 34 million one-word names on 505 endings (TLDs), read every day, each with its dates.

• Hosted, nothing to install, no key: https://mcp.unique.domains/mcp (51 tools)
• On your machine: npx -y @uniquedomains/mcp-server (56 tools without a key)

One question, one tool call. "Is get.plumbing taken?" on 2026-11-11:

{
  "name": "get.plumbing",
  "status": "for_sale",
  "registry": {
    "createdAt": "2020-06-03",
    "expiresAt": "2027-06-03",
    "registrar": { "name": "GoDaddy.com, LLC", "ianaId": 146 }
  },
  "comps": { "count": 10, "medianUsd": 2677 }
}

What the tools read:

• A name: status, price today, drop day, the registry record a WHOIS lookup shows, DNS, similar sales and its open auction.
• A word: the endings it is still open on. Each word exists once on each ending.
• An ending: registry facts, launch phases, market figures, and ICANN's 2026 new gTLD applications.
• Registrar prices: nine registrars' lists, read daily, with each confirmed change and over 300 renewal traps (.agency: $3.50 the first year, $28.04 a year after, on 2026-11-11).
• The market: over 200,000 auctions closing a day across seven venues, and 12 months of sales as totals.
• Trends and the agenda: the naming trends of two daily editions, Trending Domains and Business Ideas, and the month's launch dates.

No tool here registers, buys or changes a name. An answer carries its day where the record has one, so your assistant can say how fresh it is.

Three questions to try:

• What is the registry record of get.plumbing?
• What are the newest registrar price changes?
• What is on the domain industry agenda this month?

Connect your assistant

Claude

In Claude (web or Desktop), open Customize, then Connectors, click "+ Add", then "Add custom connector", name it Unique.domains and paste https://mcp.unique.domains/mcp. No sign-in is needed. On a Team or Enterprise plan, an Owner adds it in Organization settings, then Connectors, and members connect it from Customize, then Connectors.

To run it on your machine instead, add this to Claude Desktop's claude_desktop_config.json:

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

Claude Code

claude mcp add --transport http uniquedomains https://mcp.unique.domains/mcp

Or on your machine, with a member key:

claude mcp add uniquedomains -e UD_API_KEY=ud_live_your_key -- npx -y @uniquedomains/mcp-server

Cursor

Add to Cursor (the direct link is cursor://anysphere.cursor-deeplink/mcp/install?name=uniquedomains&config=eyJ1cmwiOiJodHRwczovL21jcC51bmlxdWUuZG9tYWlucy9tY3AifQ==), or put this in .cursor/mcp.json:

{
  "mcpServers": {
    "uniquedomains": { "url": "https://mcp.unique.domains/mcp" }
  }
}

VS Code

code --add-mcp '{"name":"uniquedomains","type":"http","url":"https://mcp.unique.domains/mcp"}'

Or in .vscode/mcp.json:

{
  "servers": {
    "uniquedomains": { "type": "http", "url": "https://mcp.unique.domains/mcp" }
  }
}

ChatGPT

Go to chatgpt.com/plugins, select the plus button, then "Add custom MCP server". Name it Unique.domains, enter https://mcp.unique.domains/mcp as the server URL with no authentication, then "Create as a plugin". Install the plugin, then in a new conversation type @ and pick it. Your account's or workspace's policies decide whether custom servers can be added.

Any other client

Streamable HTTP at https://mcp.unique.domains/mcp, or stdio with npx -y @uniquedomains/mcp-server.

Plugins

The plugin/ folder is a plugin for the AI assistants that take one. It holds the hosted connector and one skill, which tells the assistant which tool answers which question. It runs nothing on your machine and uses no key.

In Claude Code, run this line:

/plugin install unique-domains --marketplace UniqueDomains/mcp-server

Claude Code asks you to confirm this repository as a marketplace, then opens the plugin's page, where you install it. The line needs Claude Code 2.1.275 or later. On an earlier version, do the same in two steps:

/plugin marketplace add UniqueDomains/mcp-server
/plugin install unique-domains@uniquedomains

Three other tools read files of this repository. Grok Build reads plugin/.grok-plugin/plugin.json, in the same folder. Gemini CLI reads gemini-extension.json at the root, which adds the hosted connector and loads GEMINI.md, the skill's guidance, as its context file. For Devin, npm run plugin:devin builds the folder its marketplace takes.

Free tools and a member key

Without a key, the server answers what the Unique.domains website shows anyone: a name's status and registry record, an ending's facts, registrar prices, market aggregates, trends and the agenda.

A member key adds the keyed tools of its plan, the Founder or the Investor plan. Create the key in Unique.domains under Settings, Account, API, then pass it to the server on your machine:

UD_API_KEY=ud_live_your_key npx -y @uniquedomains/mcp-server

The server reads the key's plan once at start and lists the tools that plan opens. The plans are described at unique.domains/api.

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