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Open Library.
1 service independently monitored by Guardian
GUARDIAN-MEASURED
● OPERATIONALAll systems operational
Our keyless probes, every 5 minutes. Independent of the vendor.
VENDOR-REPORTED
□ NO DATA
Their status feed, shown for reference when available.
Two lanes. Never merged into one number.
01 ⁄ GUARDIAN-MEASURED · 90-DAY WINDOW · 30-DAY NARROW WINDOW
Measured by Guardian probes only. Mobile rows show a separately computed trailing 30-day percentage beside the 30 visible cells.
MCP servers □ NO DATA · no MCP servers monitored
02 ⁄ VENDOR-REPORTED · WINDOW BEGINS WITH FIRST FEED OBSERVATION
Vendor-reported components
No vendor-reported components for this provider
Grade: A ≥99.9% · B ≥99% · C ≥95% · D ≥90% · F <90%
03 ⁄ PAST INCIDENTS
Past incidents Aug 27, 2026
15:56 UTC GUARDIAN-MEASUREDGuardian-measured HTTP 503 API · ongoing since Aug 24, 2026
Aug 26, 2026 No incidents reported.
Aug 25, 2026 No incidents reported.
Aug 24, 2026 No incidents reported.
Aug 23, 2026 No incidents reported.
Aug 22, 2026 No incidents reported.
Aug 21, 2026 No incidents reported.
Aug 20, 2026
16:27 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 1m06:40 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 7m
Aug 19, 2026 No incidents reported.
Aug 18, 2026
17:01 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 1d 5h
Aug 17, 2026
12:08 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : Unreachable · resolved after 26m11:55 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 3m
Aug 16, 2026
20:08 UTC Availability incident API · Endpoint has failed 3 consecutive polls (latest: HTTP 522)20:00 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 522 · resolved after 15h 51m15:20 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 521 · resolved after 56m14:54 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 7m07:06 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 16m07:01 UTC Availability incident API · Endpoint has failed 3 consecutive polls (latest: HTTP 503)06:59 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 4m06:35 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved (start not recorded)
+1 more event this day not shown
Aug 15, 2026
22:46 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 2m19:55 UTC Availability incident API · Endpoint has failed 3 consecutive polls (latest: HTTP 503)19:52 UTC Availability incident API · Endpoint has failed 3 consecutive polls (latest: HTTP 503)19:49 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : Unreachable · resolved after 46m19:35 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 2m18:54 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 6m18:42 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 8m18:40 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after less than a minute
Aug 14, 2026
21:33 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 522 · resolved after 8m01:27 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 3m01:14 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 1m01:06 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 1m
Aug 13, 2026
21:06 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : Unreachable · resolved after 7m
Aug 12, 2026
21:48 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 522 · resolved (start not recorded)
Aug 8, 2026
00:19 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 522 · resolved after 4m
Jul 26, 2026
21:35 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 5m
Jul 19, 2026
18:44 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 4m06:44 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 5m04:24 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 9m
Jul 18, 2026
20:19 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 5m
Jul 13, 2026
11:04 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 4m10:35 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 5m
Jul 6, 2026
14:09 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 4m13:19 UTC Availability incident API · Endpoint has failed 3 consecutive polls (latest: HTTP 503)13:09 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 25m12:44 UTC Availability incident API · Endpoint has failed 3 consecutive polls (latest: HTTP 503)12:39 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 10m12:29 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 5m
Jul 3, 2026
00:29 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 4m
Jul 2, 2026
23:24 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 5m23:04 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 4m18:24 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 521 · resolved after 5m
Jun 30, 2026
19:48 UTC Availability incident API · Endpoint has failed 3 consecutive polls (latest: HTTP 521)19:38 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 521 · resolved after 45m
Jun 27, 2026
17:43 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 521 · resolved after 5m17:33 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 521 · resolved after 5m07:24 UTC Availability incident API · Endpoint has failed 3 consecutive polls (latest: HTTP 521)07:14 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 521 · resolved after 3h 20m05:29 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 521 · resolved after 5m04:33 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 521 · resolved after 5m
Jun 26, 2026
19:45 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 522 · resolved after 4m
Jun 23, 2026
18:44 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 5m15:19 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 5m14:59 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 5m04:49 UTC GUARDIAN-MEASUREDGuardian-measured ✓ RESOLVEDResolved API : HTTP 503 · resolved after 4m
Showing the 60 most recent of the last 90 days’ events.