Reference
Source check statuses
Source monitoring status labels.
5 min read · Updated Jul 2026
Source check statuses describe URL monitoring results for linked upstream pages.
What you will learn
- Status labels from unknown to changed
- Invalid and unreachable meanings
- Redirect loop handling
- Changed response workflow
Steps
- 1
Unknown
No check run yet; trigger Check now.
- 2
OK
Upstream matches expected fetch rules.
- 3
Invalid URL
Malformed link; fix URL on document.
- 4
Unreachable
Host down or blocked; verify publicly.
- 5
Not found
404 response; update or archive document.
- 6
Redirect loop
Point to canonical URL.
- 7
Blocked
Upstream blocked automated fetch; consider manual source.
- 8
Changed
Content differed; open source change review.
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