List of domain registrars · Integrations
regfish
regfish is a German domain registrar and internet infrastructure provider in Gießen, Hesse. It sells domains, DNS and SSL certificates to individuals, businesses and developers, and is a DENIC member for .de domains.
| Support | Help center |
|---|---|
| Lemon Domains | Connects by API, so your AI can read and manage these domains |
| Website | regfish.de |
regfish MCP
Lemon Domains is the unofficial regfish MCP server. Connect your regfish account by API once, and Claude, ChatGPT, Cursor or any MCP client can answer questions about your regfish 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 regfish domains expire in the next 60 days?”
- “Is auto-renew on for every domain at regfish?”
- “Did the nameservers change on any of my regfish domains this week?”
Connect regfish · How the domain MCP server works · Track regfish renewals
Lemon Domains is independent and not affiliated with regfish.
regfish API
| Status | Integrated |
|---|---|
| API key | How to get a regfish API key |
| Documentation | regfish.de |
About regfish
| Legal name | regfish GmbH |
|---|---|
| Headquarters | Gießen, Germany |
| Ownership | Private |
| Type | Retail registrar |
| ICANN accreditation | Not ICANN-accredited |
| Site languages | German, English |
regfish history
| 2007 | regfish GmbH is incorporated. |
|---|
Domain management features
- Free DNS hosting
Listed where we confirmed regfish offers it. Some features cost extra or only cover certain extensions.
Services
| Service | Check it on lemon.domains |
|---|---|
| Domain registration | Run a domain report |
| DNS hosting | Look up DNS records |
regfish support
| Channels | Help center |
|---|---|
| Contact | Contact regfish |
Domain extensions regfish sells
Confirmed on its site: .de.
regfish in Lemon Domains
Connect regfish with an API key and every regfish 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
- regfish API settings
- Lemon Domains IP addresses
- 2.31.94.66
- API reference
- regfish API docs
What you can do with regfish domains
In Lemon Domains
- Bring in your domains · Synced daily by API
- See expiry, auto-renew and lock status
On regfish'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 regfish to Lemon Domains
Three steps: create a read-only API key at regfish, add it to Lemon Domains, and your domains sync once a day from then on. Connect as many regfish accounts as you have.
Create a read-only API key at regfish
A regfish API key with only the domain:read permission. It can list your domains and change nothing, not even DNS records.
- 1Sign in to the regfish dash and open Account → Security → API keys.
- 2Create a new key named “Lemon Domains” and give it only the domain:read permission.
- 3Copy the key. It is only shown once.
Add it to Lemon Domains
- 1Sign in to Lemon Domains (it's free), open Connections and choose regfish.
- 2Give the connection a friendly name, like “regfish personal” or “regfish clients”. Connect each regfish 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
- Whether auto-renew is on
Lemon Domains only ever sends read requests to regfish: 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
- regfish 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 regfish 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 regfish portal, paste it into Lemon Domains, and you're done. Re-import any time to refresh. Paste or CSV import needs no regfish credentials at all.
- 1Open your regfish account at regfish.de and go to the domain list.
- 2If the list paginates, switch to "show all" or the largest page size so every regfish domain is visible.
- 3Copy the visible list, or export to CSV if regfish 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 "regfish personal" or "regfish client work") so sub-accounts stay distinct.
Other registrars in Germany
| Integrated | |
| Integrated | |
| Integrated | |
| Blocked | |
| Blocked | |
| Blocked |
Sources: the ICANN list of accredited registrars and the IANA registrar ID registry (refreshed 2026-10-24), and regfish'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 regfish domains?
Yes. Connect your regfish 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 regfish dashboard or uploading a CSV export. Multiple regfish accounts are supported with friendly labels so sub-accounts stay distinct in the unified portfolio.
How do I get a regfish API key?
Sign in to the regfish dash and open Account → Security → API keys. Create a new key named “Lemon Domains” and give it only the domain:read permission. Copy the key. It is only shown once. A regfish API key with only the domain:read permission. It can list your domains and change nothing, not even DNS records.
Do I need to share my regfish password?
No. Connecting by API uses an API key you create at regfish, not your password. A regfish API key with only the domain:read permission. It can list your domains and change nothing, not even DNS records. 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 regfish accounts?
Yes. Add one connection per regfish 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 regfish domains?
No. Renewal still happens at regfish. Lemon Domains tracks expiry dates and auto-renew status so you know exactly when to act, but the renewal button stays at regfish.
Can AI assistants query my regfish domains?
Yes. The Lemon Domains MCP server lets ChatGPT, Claude, Cursor and any MCP client query your full portfolio, including regfish domains, in plain English. Choose read-only or read-and-write access for each token.
Is regfish ICANN-accredited?
regfish is not on the ICANN list of accredited registrars. It registers .de domains through the country-code registry.
Is there an MCP server for regfish domains?
Yes. Lemon Domains connects to regfish by API and serves your regfish domains through its remote MCP server, so Claude, ChatGPT, Cursor and any MCP client can answer questions about them. It is independent of regfish and not affiliated with it, so the same connection also covers your domains at every other registrar.
Does regfish have an API?
Yes. Lemon Domains connects to regfish 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 regfish sell?
Its price list includes .de.
How do I contact regfish support?
regfish offers support by help center. Its contact page is https://hilfe.regfish.de/de/.
What does regfish offer besides domain names?
DNS hosting.