4xx Client error
HTTP 422 Unprocessable Content
The server understands the content type and the syntax is correct, but it can’t process the instructions in it. APIs use it for validation errors, such as a missing required field or an invalid email address. It was called “Unprocessable Entity” in WebDAV.
//_01 Uptime checks
Is 422 up or down for a monitor?
Uptimecheck HTTP monitor
Default settings
Down. It is outside the default 200–399 range, so a monitor reports an outage once a second check confirms it. If 422 is the answer you expect from that URL, add it to the monitor’s expected status codes.
Is it down? checker
Free, at /is-it-down/
Up. The checker counts any answer below 500 as the site answering: a 422 comes from a server that is running.
//_02 Causes and fixes
Why you see 422 and what to do
Typical causes
- Validation errors in a form or API call.
If you run the site
- Return which fields failed and why, so the client can fix them.
If you’re a visitor
- Check the form for highlighted fields and try again.
Know the moment your site stops answering as it should
An Uptimecheck monitor requests your page as often as every minute, checks the status code against the ones you expect, confirms a failure with a second check and then alerts you.
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Questions
What does HTTP 422 mean?
The server understands the content type and the syntax is correct, but it can’t process the instructions in it. APIs use it for validation errors, such as a missing required field or an invalid email address. It was called “Unprocessable Entity” in WebDAV.
Does an uptime monitor count 422 as down?
Down. It is outside the default 200–399 range, so a monitor reports an outage once a second check confirms it. If 422 is the answer you expect from that URL, add it to the monitor’s expected status codes.
Downtime is obsolete.
Set up your first monitor in under a minute, or look around the live demo first.
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