List of domain registrars · Integrations

Xserver Domain
Xserver Domain is the domain registration service of Xserver Inc., a Japanese hosting company in Osaka. Xserver launched its rental server service in 2003 and incorporated in 2004; it also runs the Shin and Star hosting and domain brands.
| Extensions sold | Over 70 |
|---|---|
| WHOIS privacy | Included at no extra cost |
| Support | Live chat, Phone, Email or tickets, Help center, Phone and chat weekdays 10:00 to 18:00 Japan time; email 24/7 |
| Lemon Domains | Connects by API, so your AI can read and manage these domains |
| Website | xdomain.ne.jp |
Xserver Domain MCP
Lemon Domains is the unofficial Xserver Domain MCP server. Connect your Xserver Domain account by API once, and Claude, ChatGPT, Cursor or any MCP client can answer questions about your Xserver Domain domains next to the domains you hold at every other registrar. Connections start read only, so your AI changes only what you allow.
- “Which of my Xserver Domain domains expire in the next 60 days?”
- “Is auto-renew on for every domain at Xserver Domain?”
- “Did the nameservers change on any of my Xserver Domain domains this week?”
Connect Xserver Domain · How the domain MCP server works · Track Xserver Domain renewals
Lemon Domains is independent and not affiliated with Xserver Domain.
Xserver Domain API
| Status | Integrated |
|---|---|
| API key | How to get a Xserver Domain API key |
| Documentation | developer.xserver.ne.jp |
| Notes | One API key in the XServer account covers domains and hosting. |
About Xserver Domain
| Legal name | Xserver Inc. |
|---|---|
| Headquarters | Osaka, Japan |
| Founded | 2004 |
| Ownership | Private |
| Type | Web host that registers domains |
| ICANN accreditation | IANA ID 1557 |
| Site languages | Japanese |
| RDAP server | https://rdap.star-domain.jp/ |
Xserver Domain history
| 2003 | Launches the Xserver rental server service. |
|---|---|
| 2004 | Xserver Inc. is incorporated in Osaka. |
Services
| Service | Check it on lemon.domains |
|---|---|
| Domain registration | Run a domain report |
| DNS hosting | Look up DNS records |
| Web hosting | Find who hosts a site |
Xserver Domain support
| Channels | Live chat, Phone, Email or tickets, Help center |
|---|---|
| Hours | Phone and chat weekdays 10:00 to 18:00 Japan time; email 24/7 |
| Languages | Japanese |
| Contact | Contact Xserver Domain |
Domain extensions Xserver Domain sells
Xserver Domain says it sells over 70. Confirmed on its site: .co.jp, .com, .jp, .net.
Transferring a domain away from Xserver Domain
In the account panel, click the domain and press the auth code check button (認証鍵の確認) under Basic information. The code is not available through the API.
Give the code to the new registrar to start the transfer. Most extensions can't move within 60 days of registration or a previous transfer. Xserver Domain's guide
XServer Domain in Lemon Domains
Connect XServer Domain with an API key and every XServer Domain domain joins your other registrars in one list, syncs once a day, and is there for your AI through MCP, the API and the CLI.
- How it connects
- Daily sync by API key
- Get an API key
- XServer Domain API settings
- Lemon Domains IP addresses
- 2.31.94.66
- API reference
- XServer Domain API docs
What you can do with XServer Domain domains
In Lemon Domains
- Bring in your domains · Synced daily by API
- See expiry, auto-renew and lock status
On XServer Domain's site
- Edit DNS records
- Change nameservers
- Turn the transfer lock on or off
- Turn auto-renew on or off
- Renew a domain
- Buy a new domain
- Get a transfer code
Connect XServer Domain to Lemon Domains
Three steps: create a read-only API key at XServer Domain, add it to Lemon Domains, and your domains sync once a day from then on. Connect as many XServer Domain accounts as you have.
Create a read-only API key at XServer Domain
Create a read-only (読み取り専用) key for the Domain service only, with purchases, transfers and renewals not allowed. It can list your domains but cannot change, renew or transfer them. You can also give it an expiry date and an IP restriction.
- 1Sign in to XServer Account and open API key management (APIキー管理), then add a key (APIキー追加).
- 2Name it “Lemon Domains” and set the permission to read-only (読み取り専用).
- 3Under target services, choose only the Domain service (XServerドメイン) and all domains, and leave domain purchases, transfers and renewals off.
- 4Optionally set an expiry date.
- 5If you limit the key to certain IP addresses, allow the Lemon Domains IP address shown on the connect page.
- 6Create the key and copy it. XServer only shows it once.
Add it to Lemon Domains
- 1Sign in to Lemon Domains (it's free), open Connections and choose XServer Domain.
- 2Give the connection a friendly name, like “XServer Domain personal” or “XServer Domain clients”. Connect each XServer Domain account separately.
- 3Paste your api key.
- 4Click Test connection. Lemon Domains checks the API key and shows how many domains it can see, without saving anything.
- 5Tick the checkbox to confirm you understand the risks, pick the project new domains go into, and click Connect and import. Your domains appear straight away and sync once a day after that.
What Lemon Domains reads
- Domain names (including internationalised names)
- Status, such as active, expired or pending transfer
- Expiry and registration dates
Lemon Domains only ever sends read requests to XServer Domain: each integration has a fixed list of read-only calls it may make, so it never renews, transfers or changes a domain. Your API key is encrypted at rest and never shown again.
If something goes wrong
- XServer Domain rejects the API key
- Copy it again with no spaces at either end. Some registrars only show the secret once, so create a new key if you didn't save it.
- The key has an IP restriction
- Lemon Domains connects from 2.31.94.66. Add it to the API key's allowed IPs, or remove the restriction.
- Some domains are missing
- Make sure the API key belongs to the XServer Domain account (or sub-account) that holds those domains. Connect each account separately.
Rather not use an API key? Import by paste or CSV
Copy your list from the XServer Domain portal, paste it into Lemon Domains, and you're done. Re-import any time to refresh. Paste or CSV import needs no XServer Domain credentials at all.
- 1Open your XServer Domain account at xdomain.ne.jp and go to the domain list.
- 2If the list paginates, switch to "show all" or the largest page size so every XServer Domain domain is visible.
- 3Copy the visible list, or export to CSV if XServer Domain offers it from the account area.
- 4In Lemon Domains, click Import, paste the list or upload the CSV, and map the columns. Lemon Domains previews everything before it commits.
- 5Give the registrar account a friendly label (for example "XServer Domain personal" or "XServer Domain client work") so sub-accounts stay distinct.
Other registrars in Japan
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Sources: the ICANN list of accredited registrars and the IANA registrar ID registry (refreshed 2026-10-24), and Xserver Domain's own site and documentation (reviewed October 2026). This page is also available as Markdown and JSON. Something out of date? Tell us.
Frequently asked questions
Does Lemon Domains support XServer Domain domains?
Yes. Connect your XServer Domain account with an API key and Lemon Domains syncs your domains automatically once a day. You can also import by pasting your domain list from the XServer Domain dashboard or uploading a CSV export. Multiple XServer Domain accounts are supported with friendly labels so sub-accounts stay distinct in the unified portfolio.
How do I get a XServer Domain API key?
Sign in to XServer Account and open API key management (APIキー管理), then add a key (APIキー追加). Name it “Lemon Domains” and set the permission to read-only (読み取り専用). Under target services, choose only the Domain service (XServerドメイン) and all domains, and leave domain purchases, transfers and renewals off. Optionally set an expiry date. If you limit the key to certain IP addresses, allow the Lemon Domains IP address shown on the connect page. Create the key and copy it. XServer only shows it once. Create a read-only (読み取り専用) key for the Domain service only, with purchases, transfers and renewals not allowed. It can list your domains but cannot change, renew or transfer them. You can also give it an expiry date and an IP restriction.
Do I need to share my XServer Domain password?
No. Connecting by API uses an API key you create at XServer Domain, not your password. Create a read-only (読み取り専用) key for the Domain service only, with purchases, transfers and renewals not allowed. It can list your domains but cannot change, renew or transfer them. You can also give it an expiry date and an IP restriction. Keys are encrypted at rest. Lemon Domains only ever sends read requests. Or skip the API and paste your list or upload a CSV.
Can I track multiple XServer Domain accounts?
Yes. Add one connection per XServer Domain account, each with its own friendly name. Personal and business logins, sub-accounts, and client accounts all sit side by side in one dashboard.
Does Lemon Domains renew my XServer Domain domains?
No. Renewal still happens at XServer Domain. Lemon Domains tracks expiry dates and auto-renew status so you know exactly when to act, but the renewal button stays at XServer Domain.
Can AI assistants query my XServer Domain domains?
Yes. The Lemon Domains MCP server lets ChatGPT, Claude, Cursor and any MCP client query your full portfolio, including XServer Domain domains, in plain English. Choose read-only or read-and-write access for each token.
Is Xserver Domain ICANN-accredited?
Yes. Xserver Domain is on the ICANN list of accredited registrars, so it can register generic extensions such as .com directly with the registries.
What is Xserver Domain's IANA ID?
1557. The IANA registrar ID appears in the registrar field of a domain's public record, so it shows which registrar a domain is with.
What other names does Xserver Domain operate under?
Its accreditations are also held as XServer, Inc.. Domains registered through any of them can show those names as the registrar.
Is there an MCP server for Xserver Domain domains?
Yes. Lemon Domains connects to Xserver Domain by API and serves your Xserver Domain domains through its remote MCP server, so Claude, ChatGPT, Cursor and any MCP client can answer questions about them. It is independent of Xserver Domain and not affiliated with it, so the same connection also covers your domains at every other registrar.
Does Xserver Domain have an API?
Yes. Lemon Domains connects to Xserver Domain by API and syncs your domain list every day, with expiry dates and renewal settings. Your AI assistant can then answer questions about those domains through the Lemon Domains MCP server.
What domain extensions does Xserver Domain sell?
Xserver Domain says it sells over 70 extensions. Its price list includes .com, .net, .jp and .co.jp.
Does Xserver Domain include WHOIS privacy?
Yes. Xserver Domain hides your contact details in the public record at no extra cost, for the extensions whose registry allows it. Some country-code extensions, such as .us, don't allow privacy at all.
How do I contact Xserver Domain support?
Xserver Domain offers support by live chat, phone, email or tickets and help center (Phone and chat weekdays 10:00 to 18:00 Japan time; email 24/7). Xserver Domain offers phone support. Its contact page is https://www.xdomain.ne.jp/support/support.php.
What does Xserver Domain offer besides domain names?
DNS hosting and Web hosting.
How do I transfer a domain away from Xserver Domain?
In the account panel, click the domain and press the auth code check button (認証鍵の確認) under Basic information. The code is not available through the API. Then give the code to the new registrar to start the transfer.




