Pierre-Olivier Mercier
5ccdd8892f
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Add individual reference pages for all domain health checkers (EN/FR), update the homepage feature descriptions in both languages to highlight monitoring, notifications, and domain availability checks.
33 lines
1.8 KiB
Markdown
33 lines
1.8 KiB
Markdown
---
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date: 2026-06-11T09:00:00+02:00
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author: nemunaire
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title: Domain availability
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description: "Notifies you when a watched domain name becomes available for registration."
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weight: 40
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---
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The **Domain availability** checker watches a domain name you do *not* own and notifies you the moment it becomes available for registration. It is the counterpart of {{< relref "/reference/checkers/domain-expiry" >}}: instead of protecting a domain you hold, it lets you grab one as soon as it lapses.
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This is a **domain-level** checker: registration status is determined from the registry through a WHOIS/RDAP lookup. A domain is considered available when the registry reports that it does not exist.
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## What it checks
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A single rule, `domain_availability_check`, reports whether the watched domain is still registered or has become free.
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| Status | Condition |
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|--------|-----------|
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| **Critical** | The domain is now available for registration |
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| **OK** | The domain is still registered (the registrar and expiry date are reported when known) |
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| **Error** | The availability lookup failed |
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{{% notice style="info" title="Why available is reported as Critical" %}}
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The status is intentionally inverted compared with the usual convention. Reporting *Critical* when the domain becomes available makes the registered → available transition cross the notification threshold, so you are alerted exactly once when the domain frees up.
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{{% /notice %}}
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## Options
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This checker has no user-tunable options. The watched domain name is supplied automatically.
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## In happyDomain
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Unlike the other domain-level checkers, **Domain availability** is not scheduled on the domains you manage. It is driven by the dedicated availability-watch list. See {{< relref "/pages/domain-availability" >}} for how to add a domain to watch, and {{< relref "/pages/checks" >}} for the general checks workflow.
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