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6/24/2026
How to build a DDNS updater with no API key

How to build a DDNS updater with no API key

Short summary

Build a self-hosted DDNS updater that detects IP changes using IPPubblico.org (no API key) and updates Cloudflare DNS records. Includes shell and Python implementations with cron/systemd deployment.

  • •Completely key-free IP detection using IPPubblico.org
  • •Two complete implementations: portable shell script and robust Python version
  • •Ready to deploy via cron or systemd service

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