ech-cron-cloudflare-example.sh

#!/bin/sh

CF_API_TOKEN="your_cloudflare_api_token"

# I recommend you to first create the HTTPS records in the cloudflare web dashboard and the use the commands below to get theier IDs
# to get your zone-ids: curl -H "Authorization: Bearer $CF_API_TOKEN" "https://api.cloudflare.com/client/v4/zones" | jq ".result[] | {name, id}"
# to get your record-ids: curl -H "Authorization: Bearer $CF_API_TOKEN" "https://api.cloudflare.com/client/v4/zones/<zone-id>/dns_records?type=HTTPS" | jq .result

# Format: hostname;identifier;zone_id;record_id
CONFIGS="
mx.example.org;mx-example-org;zone123;record123
mx.example.org;example-org;zone123;record456
mx.example.org;example-com;zone456;record789
"

# This example configures ech in the HTTPS record and also sets the server supported procols to HTTP/1.1, HTTP/2 and HTTP/3.
# You could also set ipv4/ipv6 hints in the HTTPS record and more
for config in $CONFIGS; do
    curl -sS --out-null -X PATCH \
        -H "Authorization: Bearer $CF_API_TOKEN" \
        -H "Content-Type: application/json" \
        -d '{"data":{"value": "alpn=\"h3,h2,http/1.1\" ech=\"'"$(ech.sh "$(echo "$config" | cut -d';' -f1)" "$(echo "$config" | cut -d';' -f2)")"'\""}}' \
        "https://api.cloudflare.com/client/v4/zones/$(echo "$config" | cut -d';' -f3)/dns_records/$(echo "$config" | cut -d';' -f4)"
done