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7/20/2026
How to Monitor SSL Certificates and DNS Changes with Python

How to Monitor SSL Certificates and DNS Changes with Python

Short summary

A practical tutorial for building a Python-based domain monitor that tracks SSL certificate expiry, DNS record changes, WHOIS data, and subdomains via the Apify Domain Intelligence Suite. Includes code for fetching synchronous datasets, normalizing snapshots for stable comparison, and isolating module failures. Useful for DevOps teams needing consolidated domain health monitoring in a single scheduled job.

  • •Tutorial uses Apify Domain Intelligence Suite to monitor SSL, DNS, WHOIS, and subdomains in one job
  • •Includes Python code for fetching data, normalizing snapshots, and detecting changes over time
  • •Handles module-level error isolation so partial failures don't break the entire monitor

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