#!/bin/bash
 
LOGIN="your@email"
PASSWORD="yourpassword"
DOMAIN_ID="yourdomain.com"
RECORD_ID="12345" # Replace with the Record ID
IP="`curl http://jsonip.com | sed 's/{"ip":"\(.*\)"/\1/g' | sed 's/}//'`"
 
curl -H "Accept: application/json" \
     -H "Content-Type: application/json" \
     -u "$LOGIN:$PASSWORD" \
     -X "PUT" \
     -i "https://dnsimple.com/domains/$DOMAIN_ID/records/$RECORD_ID" \
     -d "{\"record\":{\"content\":\"$IP\"}}"