I use this project oznu/docker-cloudflare-dns1 where the author implements everything in bash, curl and jq. There were a bunch of projects that does this DDNS with CloudFlare but I chose this project because of this uniqueness. To use this, you just have to create an API token with Cloudflare that has these permissions: Zone - Zone Settings - Read Zone - Zone - Read Zone - DNS - Edit Also, set zone resources to All zones.