HTTP status codes

What 200, 301, 404, 500, 502, 503, 504 actually mean — and what to do about each.

Technical·July 28, 2026·10 min

The Outage Your Monitor Will Never Catch: HTTP 200 on a Broken Page

Your server returns 200 OK. Your uptime monitor is green. Your site has been serving a blank page for six hours. Why status-code monitoring misses the most expensive kind of failure — and the four checks that catch it.

Technical·March 28, 2026·4 min

What Is a 503 Service Unavailable Error?

A 503 error means the server is temporarily unable to handle requests. Here's what causes it, how long it lasts, and how to fix it.

Technical·March 17, 2026·8 min

502 vs 503 vs 504: HTTP Status Codes When a Site Is Down

What each HTTP status code actually tells you about a broken site — especially the three 5xx errors people confuse — who can fix it, and what you can do as a visitor versus as the site owner.