Unique.domains

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.

The hosted connector serves the free tools only and takes no key. Five free tools are on the npm server only. Three answer one word or one ending a caller a day, and the hosted connector is one caller for all its users: ud_get_market_sales_word, ud_get_word_market, ud_list_tld_prices. ud_get_domain answers what ud_get_name answers, and ud_get_meta_freshness reports how current each part of the data is, which every answer's meta already dates.

What an answer holds

• structuredContent: the API's data, meta and links, as the tool's output schema describes them.
• content: one line for a reader (the name and its headline fact, or the row count and the first names), then the same JSON as text.
• links.details: the public Unique.domains page about the subject, when there is one (hosted connector).
• On the hosted connector, internal ids (catalog ids, row ids, UUIDs) are left out, times become their UTC day (an auction's deadline keeps its hour), and the stamps of when a figure was computed are dropped. The npm server and the API keep them.
• A list answers 20 rows by default. When meta.cursor is set, pass it as cursor to read the next page.
• A refusal is a sentence the assistant can act on: what was wrong, what is accepted, or when a limit resets.

Privacy and security

• What the connector logs. It passes each tool's input to the Unique.domains API, and the API's request log keeps one line per call for 12 months: the path, which holds the name or word asked about, with its time, its status and how long it took. A monthly job deletes older lines. The connector calls the API under its own name, so the API never sees your address or an account of yours. When your assistant runs on your own machine, it connects to the connector from your IP address. The connector's hosting providers see it, as they see the address behind any web request, and the connector does not store it. Section 8 of the privacy policy says what the API keeps and why.
• Registry records. A name's registry answer repeats the registry's public record, which can include the holder's name or organization when the registry publishes it.
• Every origin is accepted. /mcp answers any Origin with Access-Control-Allow-Origin: *. The server is public, needs no sign-in, holds no session and never serves a member key over HTTP, so checking the origin would protect nothing, and strict origin checks break some assistants' own clients.
• HTTPS only. The hosted connector answers over HTTPS and sends Strict-Transport-Security: max-age=31536000.
• Reporting a vulnerability. Write to contact@unique.domains; please do not open a public issue for it.

The same data elsewhere

• The API reference: unique.domains/api
• The SDK and the command line: UniqueDomains/nodejs (@uniquedomains/sdk, @uniquedomains/cli)
• The open datasets on GitHub: one-word domains, expiring one-word domains, the daily editions, the 2026 new gTLD applications and the rest of the organization

Tools

56 tools answer without a key (51 on the hosted connector); a member key adds 25 more, the Investor ones for an Investor key only.

| `ud_get_d