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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 1297 ms · 2 min ago.

Reports and checks

Reports compared with the typical volume, with check latency and failures overlaid101297 ms06:4512:4518:4500:3006:30
ReportsTypical baselineCheck latencyFailed checkTimes in UTC
Numbers behind the chart
Time (UTC)ReportsBaselineLatencyFailed checks
03:1500.0535 ms0
03:3000.01028 ms0
03:4500.0946 ms0
04:0000.0698 ms0
04:1500.0904 ms0
04:3000.01021 ms0
04:4500.0370 ms0
05:0000.0293 ms0
05:1500.0912 ms0
05:3000.0288 ms0
05:4500.01103 ms0
06:0000.0357 ms0
06:1500.0630 ms0
06:3000.01297 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.