REA
Reverse engineer anything from your terminal or agent with one CLI and MCP server.
Runs on your computer
Unique.domains
What it does
Domain status, WHOIS records, nine registrars' daily prices, renewal traps and auctions. No key.
- Connects Computer or cloud
- Account or key Cloud: No key needed · Local: Needs UD_API_KEY
- Category Developer tools
Install
Pick the AI app you use, then copy the settings.
Passed 5/5 checks · What you ask goes through the maker’s server (mcp.unique.domains)
First: which AI do you use?
Pick your app and the steps appear below.
Works with Claude · about 2 min
No key, nothing to install · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1 · on Team/Enterprise an Owner adds it
Open Claude’s Connectors page
CustomizeConnectors
Click “Add” → “Custom” → “Web” and fill in these 2 fields
Copy each value into the field with the same name in Claude, then click Continue
Name · NameChecking the commands · copy buttons appear once they pass
Remote MCP server URL · AddressChecking the commands · copy buttons appear once they pass
Click Continue past the sign-in settings Claude detected · under Authentication choose what the maker says (Sign in now, Sign in when needed or No sign in), then click Add
Turn it on in a chat
+ConnectorsUnique.domains
Try it
Use Unique.domains and tell me what you can do for me, then show me one thing✓ If Claude says it is using Unique.domains or shows a Unique.domains tool in the answer, you are connected
Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with ChatGPT, depending on your plan
Full MCP: ChatGPT Business, Enterprise or Edu on the web · Pro: connects with read/fetch permissions, so tools that change data may not work · Plus: not confirmed in OpenAI’s docs; if you see an add-custom-MCP option on the Plugins page you can try these steps · web only
Open ChatGPT’s add-MCP page on the web
Plugins+Add custom MCP server
Fill in the name and address
Enter a name, paste the address under Connection, tick the risk warning and click Create as a plugin
Name · NameChecking the commands · copy buttons appear once they pass
Connection · AddressChecking the commands · copy buttons appear once they pass
Pick Unique.domains in a chat
Start a new chat and pick Unique.domains from your plugins before typing
Try it
Use Unique.domains and tell me what you can do for me, then show me one thing✓ If ChatGPT says it is using Unique.domains or shows a Unique.domains tool in the answer, you are connected
Menu names checked against OpenAI’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with Claude Code · about 2 min
No key, nothing to install
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Paste this command and press Enter
Checking the commands · copy buttons appear once they pass
Type /mcp in Claude Code
You should see Unique.domains listed as connected
Try it
Use Unique.domains and tell me what you can do for me, then show me one thing✓ If Claude Code says it is using Unique.domains or shows a Unique.domains tool in the answer, you are connected
Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with Cursor · about 2 min
No key, nothing to install
Click this button to open Cursor
Checking the commands · copy buttons appear once they pass
Open the AI chat in Cursor in Agent mode
Try it
Use Unique.domains and tell me what you can do for me, then show me one thing✓ If Cursor says it is using Unique.domains or shows a Unique.domains tool in the answer, you are connected
Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with VS Code · about 2 min
No key, nothing to install
Click this button to open VS Code
Checking the commands · copy buttons appear once they pass
Open the AI chat in VS Code in Agent mode
Try it
Use Unique.domains and tell me what you can do for me, then show me one thing✓ If VS Code says it is using Unique.domains or shows a Unique.domains tool in the answer, you are connected
Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.
Address for apps that connect over the web
Address
Checking the commands · copy buttons appear once they pass
JSON settings are under “For developers” below
For developers: Terminal commands and JSON settings
Over the web
Claude Code
Checking the commands · copy buttons appear once they pass
Cursor (~/.cursor/mcp.json)
Checking the commands · copy buttons appear once they pass
VS Code (mcp.json)
Checking the commands · copy buttons appear once they pass
Installed on your computer
Claude Code
Checking the commands · copy buttons appear once they pass
Claude Desktop (claude_desktop_config.json)
Checking the commands · copy buttons appear once they pass
Cursor (~/.cursor/mcp.json)
Checking the commands · copy buttons appear once they pass
VS Code (mcp.json)
Checking the commands · copy buttons appear once they pass
Values you fill in
UD_API_KEYsecret envOptional member key (Settings, Account, API in Unique.domains): adds the tools of the key's plan.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
At a glance
- Downloads per weeki
- Not on npm/PyPI
- Verified domain
- ✓ unique.domains
- Connection
- Computer or cloud
- Latest versioni
- 0.1.5
- Categoryi
- Developer tools
- Published to registryi
- Nov 13, 2026
- Code last changedi
- Nov 11, 2026
- Maker
- UniqueDomains
- Packages
npm: @uniquedomains/mcp-server- Website
- unique.domains
- Registry status
- Active
Which apps can use it
Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.
Connect over the internet in
ClaudeChatGPTGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatOpen WebUIRaycast
Run on your computer in
ClaudeGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatRaycast
Related guides
What it can do
Tool names and descriptions exactly as the server reported them on Nov 9, 2026. The maker wrote them, not us; we show them as plain text.
ud_get_nameThe stored answer for one domain name: status, drop day, price today, registry facts, word facts and similar sales. Pass `name` (such as lantern.io).
ud_get_name_registryThe latest stored registry record of one name: dates, registrar, status codes, nameservers, DNSSEC and holder. Pass `name` (such as lantern.io).
ud_get_name_dnsThe latest stored DNS reading of one name, with its parking venue. Pass `name` (such as lantern.io).
ud_get_name_compsThe similar-sales aggregate of one name and the endings its word sold on. Pass `name` (such as lantern.io).
ud_get_name_auctionThe open auction of one name, if any: venue, deadline, bid and the first-year cost. Pass `name` (such as lantern.io).
ud_resolve_wordTurns what a caller typed into the catalog word it names, or up to five candidates. Pass `q` (such as harbors).
ud_list_word_categoriesThe catalog's word categories, by name. Takes no input.
ud_get_word_endingsA word's endings as the nightly update holds them: counts, the key endings and open names per ending. Pass `word` (such as harbor); the other inputs are optional.
ud_get_word_notabilityA word's Wikipedia and Wikidata facts. Pass `word` (such as harbor).
ud_list_domainsOne-word catalog names under filters. Every input is optional; `limit` sets the page size.
ud_get_domainOne catalog name, by name or id. Pass `nameOrId` (such as lantern.io).
ud_get_domain_dropsNames dropping on one day. Every input is optional; `limit` sets the page size.
ud_list_domain_hacksDomain hacks: names whose ending completes the word. Every input is optional; `limit` sets the page size.
ud_get_catalog_statsCatalog headline totals for the latest day. Takes no input.
ud_list_tldsEvery root TLD with its registry facts and launch phases, alphabetical. Every input is optional; `limit` sets the page size.
ud_get_tldOne TLD in full: registry facts, phases, market, quality band and registrar prices. Pass `tld` (such as ai).
ud_get_tld_statsThe ending's latest market rollup, and with history its last daily rows. Pass `tld` (such as ai); the other inputs are optional.
ud_list_tld_phasesEvery dated launch phase of the ending, chronological. Pass `tld` (such as ai).
ud_list_tld_changesThe ending's public registry changes, newest first. Pass `tld` (such as ai); the other inputs are optional.
ud_list_tld_keywordsThe keywords the catalog attaches to the ending, by type. Pass `tld` (such as ai); the other inputs are optional.
ud_list_tld_applicationsThe 2026 new gTLD round as ICANN publishes it, A to Z, with two simple bands. Every input is optional; `limit` sets the page size.
ud_list_tld_application_changesEvery recorded status or contention change of the round, newest first. Every input is optional; `limit` sets the page size.
ud_get_tld_application_stringOne applied-for string: its applications and its change history. Pass `string` (such as studio).
ud_list_registrarsThe nine registrars whose daily price lists are compared, in catalog order. Takes no input.
ud_list_registrar_pricesA registrar's list prices, alphabetical by ending. Pass `registrar` (such as namecheap); the other inputs are optional.
ud_list_registrar_changesA registrar's confirmed list-price changes, newest first. Pass `registrar` (such as namecheap).
ud_list_price_changesConfirmed registrar price changes across the nine, newest first. Every input is optional.
ud_list_price_trapsEndings whose cheapest first year renews at a trap price, alphabetical. Every input is optional.
ud_list_venuesThe parking and marketplace venues with a profile and their rounded footprint. Takes no input.
ud_get_venueOne venue's profile with its verified listing terms. Pass `id` (such as afternic).
ud_list_iana_registrarsThe IANA registrar list as the registry sync stores it, by id. Every input is optional; `limit` sets the page size.
ud_get_iana_registrarOne IANA registrar by id. Pass `id` (such as 1861).
ud_get_market_salesThe domain sales pulse as headline aggregates: windows, price bands and the sold-before count. Takes no input.
ud_list_market_sales_seriesOne sales series by day, week or month, oldest first. Pass `kind` (such as week).
ud_list_market_sales_endingsEach ending's 12-month and 30-day sales figures, alphabetical. Takes no input.
ud_get_market_sales_lengthsSales by label length for .com, .ai, .io and .co. Takes no input.
ud_list_market_sales_moversUp to ten words whose sales moved over the last 30 days. Takes no input.
ud_get_market_auctionsToday's domain auctions by venue, ending and length, the next seven days and the tracked counts. Takes no input.
ud_list_market_auctions_sampleThe day's frozen sample of up to 20 single-word names at auction, by deadline. Takes no input.
ud_list_market_auction_venuesThe seven auction venues with their verified rules and today's counts. Takes no input.
ud_list_trendsEvery published trend with its latest edition figures and its first and last edition day. Every input is optional; `limit` sets the page size.
ud_get_trendOne trend: its latest row, its head words, its figures at every edition and its latest observations. Pass `slug` (such as padel).
ud_list_trend_categoriesThe trend categories, the `category` filter of `GET /trends`. Takes no input.
ud_list_eventsThe industry events of one month, in date order, then the events still without a date. Every input is optional.
ud_get_eventOne industry event with its organizer, location and description. Pass `slug` (such as namescon-global-2026).
ud_get_agendaThe whole public agenda of one month: industry events, TLD launch phases and registry changes. Every input is optional.
ud_get_latest_editionThe latest published daily edition of one page. Pass `persona` (such as founder).
ud_get_editionOne dated published edition of one page. Pass `persona` (such as founder) and `date` (such as 2026-11-02).
ud_get_meta_enumsEvery enum the payloads use, read from the code catalogs. Takes no input.
ud_get_meta_freshnessHow current the scanner's passes are: the day's counts and each lane's state. Takes no input.
ud_list_meta_datasetsThe GitHub datasets and the API path serving the same rows. Takes no input.
ud_list_meta_trademark_classesThe 45 Nice classes a trademark is filed under. Takes no input.
ud_get_meta_providersRegistrar identities and the auction venue and parking service catalogs. Takes no input.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 13, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified against the domain unique.domains (the registry checks domain ownership)
- ✓ Pass
Still maintained
Code last changed 2 days ago
- ✓ Pass
Has a licence
Uses MIT
- ✓ Pass
- – Not applicable
Sign-in with OAuth
No sign-in needed
- ✓ Pass
No hidden instructions in tool descriptions
Read 53 tool descriptions and found no hidden instructions to the AI
Discussion
Ask, share a tip or report that it does not work. Sorted by what people marked helpful.
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Posts here are written by users, not the PopNx team.
User reviews
No reviews yet
Compared with others in Developer toolsi
- More stars than 0% of the other 5841 servers in this category
- Published to the registry more recently than 98% of the other 5841 servers in this category
- Basic checks equal to or better than 100% of the other 5841 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Unique.domains safe?
It passed 5 of 5 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
You need to fill in: UD_API_KEY
Does it run on my computer or in the cloud?
Either way works: install it on your computer or connect to the cloud version.
Is it still maintained?
The GitHub repo last changed 2 days ago, and the latest version (0.1.5) reached the registry today.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT on the web (full MCP on Business and above; Pro read-only).
Others in the same category
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Serena MCP: the IDE for your agent
A powerful toolkit for coding, providing semantic retrieval and editing capabilities.
Runs on your computer
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
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/mcpOr on your machine, with a member key:
claude mcp add uniquedomains -e UD_API_KEY=ud_live_your_key -- npx -y @uniquedomains/mcp-serverCursor
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-serverClaude 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-serverThe 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'sdata,metaandlinks, 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.cursoris set, pass it ascursorto 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.
/mcpanswers anyOriginwithAccess-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.
| Tool | What it reads | Needs |
|---|---|---|
ud_get_name | Stored answer for one domain name | free |
ud_batch_names | Stored answers for up to 100 domain names in one call | Investor key |
ud_check_name | Reads one name live from its registry and a registrar | member key |
ud_get_name_prices | Every stored registrar quote for one name | member key |
ud_get_name_registry | Latest stored registry record of one name | free |
ud_get_name_registry_history | Stored registry record versions of one name and what moved between them | Investor key |
ud_get_name_dns | Latest stored DNS reading of one name | free |
ud_list_name_changes | Change events of one name, newest first | Investor key |
ud_get_name_history | Web history of one name in bands | Investor key |
ud_get_name_value | Stored value estimate of one name and its last 20 estimates | member key |
ud_appraise_name | Runs the appraisal of one stored name when its estimate is missing | Investor key |
ud_get_name_comps | Similar-sales aggregate of one name and how many endings its word sold on | free |
ud_get_name_auction | Open auction of one name, if any | free |
ud_resolve_word | Turns what a caller typed into the catalog word it names | free |
ud_list_word_categories | Catalog's word categories, by name | free |
ud_batch_words | Up to 100 word profiles in one call | Investor key |
ud_list_words | Searches the catalog's words by text and facets | member key |
ud_get_word | A word's profile | member key |
ud_get_word_endings | A word's endings as stored on the latest day | free |
ud_list_word_names | A word's catalog names on the endings that sell, by name | member key |
ud_get_word_trademarks | A word's trademark counts and its exact-match marks | Investor key |
ud_get_word_notability | A word's Wikipedia and Wikidata facts | free |
ud_get_word_market | A word's stored sales and auction aggregates | free, npm only |
ud_list_related_words | A word's synonyms then related words | Investor key |
ud_list_word_fits | How well the word fits each ending whose keywords list it | Investor key |
ud_request_word | Brings a word into the catalog | Investor key |
ud_get_word_request | State of a word request | Investor key |
ud_list_domains | One-word catalog names under filters | free |
| `ud_get_d