Add an A record to given cloudflare domains using API

CF-addRecord.sh

#!/usr/bin/env bash

DOMAINS="example.com|example.info"

# Global API Key and email
EMAIL="userCF@email.com";
KEY="XXX";

# New Record details
SUB="subdomain"
TYPE="A";
CONTENT="1.2.3.4";
PROXIED="true";
TTL="1";

# Get all available zones
CF_ZONES=$(curl -X GET "https://api.cloudflare.com/client/v4/zones" \
    -H "X-Auth-Email: $EMAIL" \
    -H "X-Auth-Key: $KEY" \
    -H "Content-Type: application/json")

# Select zones mathing input domains and add A record
echo "$CF_ZONES" | jq -r ".result[] | select(.name | match(\"^($DOMAINS)$\")) | [.name, .id ] | join(\" \") " | \
while IFS=' ' read -r col1 col2; do
    echo ZONE: $col1  ID: $col2;
    DOMAIN=$col1
    ZONE_ID=$col2
    
    curl -X POST "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/dns_records/" \
    -H "X-Auth-Email: $EMAIL" \
    -H "X-Auth-Key: $KEY" \
    -H "Content-Type: application/json" \
    --data '{"type":"'"$TYPE"'","name":"'"${SUB}.${DOMAIN}"'","content":"'"$CONTENT"'","proxied":'"$PROXIED"',"ttl":'"$TTL"'}' \
    | jq;
    
    sleep 3
done

source: Using the Cloudflare API to Manage DNS Records