ApiChecker

Start by pointing ApiChecker at every URL that matters—homepage, login, checkout, and critical API routes. Pick how often to probe and from which regions, then add assertions: expected status range, response time limits, and content match rules (e.g., a JSON field or a unique token in the HTML). Secure areas aren’t off-limits; supply credentials or headers to watch authenticated pages, and include FTP paths or documents (PDF/Excel) if those change frequently. Create quiet hours for deployments with a maintenance window, set who gets alerted, and decide the channel: email for general notices, Slack for engineering, SMS or voice for urgent breaks, push or RSS for subscribers, and webhooks for tools that need to react automatically.

When something slips, the alert includes the failing region, the last status, timing, and a snapshot of the response so you can confirm whether it’s a content problem or a total outage. Use the timeline to see if it’s a brief blip or a pattern. Visual comparisons and DOM-change detection help you spot unexpected edits or defacement across text, images, scripts, and links. If only one location is red, throttle changes or failover traffic there while you investigate. Auto-create tickets, post to a Slack incident channel, or trigger runbooks via webhooks. Mute the noise during ongoing work with a temporary pause, then resume checks when the fix ships. more