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semaphore.io · Cloud & developer

Is Semaphore down?

Checks are succeeding, user reports are near the baseline, and the vendor status page is clear.

What's broken? (optional)
Is it just me?
No problems detected

Live diagnosis

Is it just me?

Tests semaphore.io from your browser and compares it with our checks, the official status, and user reports.

Your browser → semaphore.io—
Your browser → us—
Our checksReaching it
Official · ReportsAll clear · Near baseline

Press Run testNothing leaves your browser except a request to the site and to us.

Live outage map

No reports in the last 24 hours.

Dots are whole states, provinces or countries, never exact locations. We never store IP addresses, and places with fewer than 3 reports are not shown. Updates every minute.

User reports

0

Near baseline. 0 in the last hour. Typical hour is about 0.

Our checks

Reaching it

Last check reached it in 999 ms · 3 min ago.

Reports and checks

Reports compared with the typical volume, with check latency and failures overlaid10651 msMon 12Wed 06Fri 00Sat 17Mon 11
ReportsTypical baselineCheck latencyFailed checkTimes in UTC
Numbers behind the chart
Time (UTC)ReportsBaselineLatencyFailed checks
Mon 0300.0651 ms0
Mon 0400.0446 ms0
Mon 0500.0437 ms0
Mon 0600.0514 ms0
Mon 0700.0463 ms0
Mon 0800.0597 ms0
Mon 0900.0369 ms0
Mon 1000.0407 ms0
Mon 1100.0519 ms0

Reliability

Score 100/100 · grade A

100%Uptime · 30 days
100%Uptime · 90 days
0 / 0Outages · 30 / 90 days
—Average outage

90 days ago → today. Uptime is from our own HTTP checks; outages are incidents that lasted long enough to list. We have 1 days of data so far, so the 90-day numbers fill in over time.

Semaphore status badge Embed a live Semaphore status badge

Free, no iframe or script. Updates every minute and links back here. More options on the embed page · JSON · MCP server

Semaphore status and 30-day uptime badge

Past outages

No outages on record for Semaphore yet. Outages of 10 minutes or more get their own page here.

All Semaphore outages · Every recent outage

Having trouble with Semaphore?

One report per service every 10 minutes from this network. No account.

What's broken? (optional)

Notes are stored for rate-limit context and are not shown publicly.

Questions

Is Semaphore down right now?

Checks are succeeding, user reports are near the baseline, and the vendor status page is clear.

Semaphore not working for me but the status is fine. What now?

If Semaphore is not working only for you, it is usually local: try a different browser or the app, switch between Wi-Fi and mobile data, and clear the cache. If lots of people report it here at the same time, the problem is on Semaphore's side.

How does Damn is it down decide Semaphore's status?

Three signals. Anonymous reports are compared with the usual volume for this hour. HTTP checks from Cloudflare have to fail twice in a row before we call our side down. When the vendor publishes a status JSON feed, that incident level is included too.

How often is Semaphore checked?

About every five minutes. The cron runs each minute and rotates through the catalog, so a full pass takes a few minutes.