A bash script for updating A records for domains on porkbun.com. The script uses the JSON processor jq, the website ifconfig.me, and the porkbun.com API. This script was made from the desire for a self-hosted dynamic DNS.
Edit the example.json file with your own secretapikey, apikey, domain, and subdomain from Porkbun.
Make porkbun-dns-updater executable and run it with the json filename as an argument:
./porkbun-dns-updater /PATH/file.json
If your current public IP address as returned from ifconfig.me differs from the current A record, the A record will be updated with your current public IP address.
The script can be run on its own or periodically using a service like cron. At time of writing I am unsure of what kind of rate-limiting Porkbun employs, but once every 5 minutes appears to be safe.