Just Domain.

ai.justdomain由 justdomain.ai 發布官方發布者v0.8.4更新於 Oct 31, 2026

Check a domain name, both prices and whether it can transfer in. You register it on justdomain.ai.

已驗證Streamable HTTP可網頁執行網頁搜尋與抓取商業與電商

概覽

AI 產生的概覽

遠端唯讀 MCP 伺服器,讓助理查詢網域可用性與價格、預檢網域轉入,並檢索商標註冊簿。

可以做什麼
  • 查詢一個或多個網域的可用性、註冊價與續約價,並為可註冊網域提供註冊連結
  • 預檢單一已在其他註冊商持有的網域:轉入阻礙、目前註冊商、DNS 是否在移轉後繼續運作,以及整期轉入價格
  • 針對一個擬定名稱檢索美國、歐盟與以色列商標註冊簿,回傳判定、衝突商標及各註冊簿的讀取日期
適用情境
適合在對話中為專案、事業或想法命名時確認名稱是否可用與價格;也適合評估把既有網域轉到其他註冊商,或在定名之前做一次商標初查。
執行需求
無需安裝:遠端 Streamable HTTP 端點,不需驗證、API 金鑰或帳號。實際註冊或轉入網域須在瀏覽器中於服務商網站完成。
安裝前請注意
所有工具皆為唯讀:對話中不會下單、付款、提出申請或做任何變更,註冊與轉入由本人在瀏覽器完成。請勿向助理提供授權(EPP)碼,伺服器既不接受也不回傳該碼。商標結果不構成法律意見,唯有在對話中查詢且所有註冊簿皆為當天或前一天讀取時,才能說名稱無衝突。溢價網域僅會回報,目前無法註冊或轉入。價格為整期總價,並非年費。

安裝

在 SourceWeft 中

  1. 開啟 儀表板中的 Just Domain.,將其新增到工作區。
  2. 為需要使用其工具的對話啟用該服務。

Web executable,透過 Streamable HTTP。 遠端服務在工作區中設定後即可從網頁執行環境執行。

交給代理程式安裝

把這段提示詞貼上到 Claude Code、Codex、Cursor 等代理程式,或 SourceWeft 對話中。代理程式會讀取該伺服器的安裝指南,先向你展示發布者、端點和登入方式,經你同意後再把它新增到你的客戶端。金鑰不會寫進任何命令。

閱讀 https://sourceweft.com/mcp/ai.justdomain%2Fjust-domain/install.md,並按其中說明把這個 MCP 伺服器接入我的客戶端。修改任何設定之前,先告訴我它的發布者、端點和登入方式,等我確認。不要把 API 金鑰寫進命令或我會提交的檔案;問我金鑰應從哪裡取得。

檢視代理程式所依據的安裝指南

其他 MCP 客戶端

把它新增到你客戶端的 mcpServers 設定中。

{
  "mcpServers": {
    "just-domain": {
      "type": "http",
      "url": "https://mcp.justdomain.ai/"
    }
  }
}

README

Just Domain - MCP Server

Check a domain name, both prices and whether it can transfer in, and check the name against trademark registers. You register it on justdomain.ai.

Ask your AI assistant whether a name is free and what it costs, and it hands back a link to register it on justdomain.ai without leaving the conversation. Ask it about a domain you already own at another registrar and it reports what would block a transfer, whether your DNS survives the move, and the full-term transfer price. Ask it whether a name is already a trademark and it checks the registers Open Trademarks (https://opentrademarks.org) has read, naming each register and its read date. Every tool is read-only: nothing is bought, filed, charged or changed in the chat.

  • Website: https://justdomain.ai
  • MCP endpoint: https://mcp.justdomain.ai/
  • Registry name: ai.justdomain/just-domain
  • Transport: Streamable HTTP (remote, nothing to install)
  • Auth: none. Every tool is read-only and unauthenticated.

Connecting

json
{  "mcpServers": {    "just-domain": {      "type": "streamable-http",      "url": "https://mcp.justdomain.ai/"    }  }}

Then ask your assistant to check a domain.

Tools

ToolWhat it does
search_domainsCheck one or more domain names: returns availability, the registration price, the renewal price, and for available names a URL to open and register on justdomain.ai. Both prices are totals for one full registration term of that ending, not per-year rates: one year on most endings, two years on .ai, whose registry mandates a two-year term. Read-only; no order or payment in chat.
check_domain_transferPrecheck ONE domain you already own at another registrar: what would block a transfer, who sponsors it today, whether its DNS keeps working through the move, and the full-term transfer price. Answered from the registry's own public RDAP record plus our registrar's price list, so it reads no account and no database. An empty blockers list is the only thing that means ready.
check_trademarkCheck ONE proposed name against the trademark registers Open Trademarks covers (US, EU and Israel), answered by Open Trademarks. A register with no read date in the answer was not checked. Returns a verdict (exact_live_mark, similar_live_marks, no_live_match, or not_checked, which is no verdict), the conflicting marks, and each register's read date. Optional goods, classes (Nice 1 to 45) and registers narrow it. A register search is not legal advice, and no answer clears a name.

The same transfer facts are published over plain HTTP for agents with no MCP client:

GET https://mcp.justdomain.ai/api/transfer/precheck?domain=example.com

Unauthenticated, read-only, no key. It is served by the MCP host above, not by the justdomain.ai website.

What these tools will not do

  • No purchase, no payment, no filing and no order is created by any tool. A registration is completed by a person in a browser on justdomain.ai.
  • Moving a domain in is self-service in a browser: the owner checks it and pays at https://justdomain.ai/transfer, pasting the authorization code there. check_domain_transfer reports whether a domain is eligible and what one full term costs, and hands back a transfer_url that opens that page for the domain.
  • No trademark tool clears a name. Never tell a user a name is clear unless it was checked in the same conversation and every register in the answer was read today or yesterday.
  • No authorization (EPP) code is ever returned, accepted or hinted at, and there is no agent path to unlocking a domain or to having a code issued. Moving a domain out is self-service, and self-service there means a human owner signed in on justdomain.ai in a browser: they switch the transfer lock off and get the code from their own account. An auth code is a bearer credential for the domain, and a chat transcript is not a place to put one.
  • Premium names are reported but cannot be registered or transferred through Just Domain yet.

Agent Skill (ChatGPT / Codex / any SKILL.md runtime)

This repo also ships a SKILL.md-format Agent Skill for Just Domain: a small package that teaches an agent when and how to use the three tools, and where to stop. It lives at skills/just-domain/.

Install (Codex / any GitHub-tree installer): point the skill installer at the GitHub tree URL:

https://github.com/just-done/just-domain-mcp/tree/main/skills/just-domain

Manual install: copy the skills/just-domain/ folder into your runtime's skills directory: $CODEX_HOME/skills/ (or ~/.codex/skills/) for Codex, ~/.claude/skills/ for Claude.

The same package is served for discovery on the MCP host, for other runtimes and /.well-known scanners:

  • Index: https://mcp.justdomain.ai/.well-known/agent-skills/index.json
  • Skill: https://mcp.justdomain.ai/.well-known/agent-skills/just-domain/SKILL.md

The skill still needs the MCP server connected (see Connecting above). It declares that dependency in agents/openai.yaml.

Who it's for

Anyone naming a project, business or idea in a chat, anyone wondering whether the domain they already own could move somewhere better or whether a name is already a trademark, and AI agents that need a real availability lookup with a clean handoff to registration.

About this repository

Public metadata and registry listing for the Just Domain MCP server: server.json, .mcp.json, icons, the skills/just-domain/ Agent Skill package, and this README. The server runs at https://mcp.justdomain.ai/; its source is not part of this repo.

License

MIT, see LICENSE.

來源:README.md,提交 0c957ee

工具

3

search_domains

Search domain availability

Use this when the user asks whether a domain name is available or what it costs to register: call it directly with the names, with no account and no confirmation needed. That includes a name for a site the user built, or is building, with ChatGPT Sites. Read-only availability and pricing lookup for domain names. No purchase or order is created by this tool; it only returns information. Preferred input: `domains`, 1 to 200 fully-qualified names (e.g. ['acme.com', 'acme.io']); results cover exactly those domains, with no suggestions or expansion. Fallback input: `query`, free text (one or more names, comma- or space-separated); names given without a TLD are expanded to popular TLDs (com/io/ai/co/net). Each result includes whether the domain is available, whether it is a premium name, the registration price and the renewal price. Both prices are totals for one full registration term of that ending, not per-year rates: one year on most endings, but two years on .ai, whose registry mandates a two-year term. Do not divide or multiply a returned price by a number of years. Available non-premium results also carry a `checkout_url` the user can open in a browser to register the domain on justdomain.ai if they choose to. Premium names cannot be registered through Just Domain yet and carry no `checkout_url`.

輸入參數querydomains

check_domain_transfer

Check whether a domain can transfer to Just Domain

Read-only transfer precheck for ONE domain the user already owns at another registrar: could it move to Just Domain, what is stopping it, what would it cost, and does its DNS survive the move. Nothing is ordered, charged, unlocked, or changed. The answer is built from two public sources only, the registry's own RDAP record and our registrar's price list, so it is safe to call without authentication and it reads nothing about the user's account. Read `blockers` before you say anything: an EMPTY list is the only thing that means the domain is ready to move. Every entry carries a plain `detail` sentence you can show as-is, and a `code` you do not recognise must still be reported through its `detail` rather than dropped. `source.rdap: false` means the registry did not answer, so nothing about the domain was established: say that, and never call it ready. `price` is the TOTAL for one full transfer term, not a per-year rate. A .ai transfer adds and charges TWO years because its registry works in two-year units. Do not divide or multiply the amount by a number of years, and do not label it per year; quote `term_note` beside it. `expected_new_expiry` is a projection (the registry's current expiry plus the term), not a date any registry has confirmed, so present it as expected. Moving a domain IN is self-service: the owner checks it and pays at https://justdomain.ai/transfer, pasting the authorization code there, and a transfer that does not complete is refunded in full. This tool tells the user whether the domain is eligible to move and what one full term would cost; hand over `transfer_url`, which opens that page for this domain in the owner's browser. Nothing is paid or ordered inside the chat. Moving a domain OUT of Just Domain IS self-service, and that means a human owner signed in on justdomain.ai in a browser, switching the transfer lock off and issuing the code from their own account. It does not mean you can do it. This tool does not return, accept, or hint at an au

輸入參數domain必填

check_trademark

Check a name against trademark registers

Read-only trademark check for ONE proposed name, answered by Open Trademarks (opentrademarks.org) from the US, EU and Israeli trademark registers. Nothing is filed, reserved, watched or paid for. Optional `goods` (free text, mapped to Nice classes), `classes` (Nice classes 1 to 45) and `registers` (a subset of `us`, `eu`, `il`; all three by default) narrow the check. Read `verdict` first. `exact_live_mark` and `similar_live_marks` name the marks behind them in `conflicts`, each with its register, number and how it matched. `no_live_match` means no live mark matched in the registers that were read: a positive signal, not clearance. `not_checked` means no register in this check has been read yet, so it is NOT a verdict: do not call the name clear or taken on it. `registers` gives each register's read date, and a register with no `loaded_at` was not checked at all. Never tell a user a name is clear unless it was checked during this conversation and every register in the answer was read today or yesterday. Quote `notice` as written: a register search is not legal advice. Use it when the user is choosing or vetting a name for a brand, product or business. It checks trademarks only: for whether a domain is available or what it costs, use `search_domains`; for moving a domain the user already owns at another registrar to Just Domain, use `check_domain_transfer`.

輸入參數name必填goodsclassesregisters

版本歷史

3
  1. v0.8.4最新Oct 31, 2026
  2. v0.8.2Oct 26, 2026
  3. v0.5.1Sep 16, 2026

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