Engineering Blog
The UpMonitor engineering blog covers the technical craft of keeping production sites alive — SSL renewals, DNS propagation, security-header audits, performance tuning, and the AI-native incident workflows that turn 60-minute MTTR into 10-minute MTTR.
How the upmonitor:// Protocol Turns AI Agents into Self-Healing Infrastructure
Learn how the UpMonitor CLI and custom protocol bridge the gap between cloud alerts and local recovery playbooks for AI agents.
AI Agents Ship Fast, Security Slips Through (2026)
AI coding agents optimize for code that runs, not behavior that is correct. Green CI and HTTP 200 hide silent regressions. Here is how to catch them.
Googlebot's 2MB Crawl Limit: Why Your Decompressed HTML Goes Uncrawlable (and How to Fix It)
Googlebot indexes only the first 2MB of your HTML, measured on uncompressed bytes, distinct from the 15MB fetch limit. Detect silent truncation and fix it.
HSTS Preloading Guide: How to Secure Your Domain at the Browser Level
Learn how to get your domain on the global HSTS preload list to ensure maximum transport security.
HTTP Status Codes Explained: 2xx, 3xx, 4xx, and 5xx
A comprehensive guide to understanding server response codes and how they affect your site's availability.
How to Fix Mixed Content and Redirect Chains
A practical guide to securing your website resources and optimizing your redirect logic for speed and SEO.
DNS Propagation Guide: How Long Does it Really Take?
Learn the mechanics of DNS propagation, the impact of TTL, and how to track your changes globally.
Technical SEO Audit Guide: Robots.txt, Sitemaps, and Meta Tags
How to ensure your website is fully discoverable by search engines and AI crawlers using our free diagnostic tools.
Free Website Uptime Monitoring: How to Get Started in 2026
A beginner's guide to setting up professional-grade uptime monitoring and diagnostic audits for free.
Security Headers Guide: HSTS, CSP, and X-Frame-Options Explained
How to implement and verify critical HTTP security headers to protect your website from client-side attacks.
SSL Certificate Troubleshooting: Common Errors and How to Fix Them
A guide to diagnosing and fixing the most common SSL/TLS errors, from expired certificates to broken trust chains.
How to Build a Website Monitoring Pipeline in CI/CD
Learn how to use the UpMonitor CLI to automate website health checks in GitHub Actions, GitLab CI, and more.
How to Ensure Your Website is Secure: The Complete 2026 Checklist
A step-by-step guide to auditing your website's security - SSL certificates, security headers, HTTPS redirects, and automated monitoring with UpMonitor.
Stop reading about incidents. Start preventing them.
Every guide on this page maps to a checker that UpMonitor runs every minute. Schedule the audits. Get an AI-drafted remediation prompt when something breaks.