update an A record in digital Ocean (digitalocean.com). Dynamic DNS style

dyndns.sh

#!/bin/bash
#update an A record in digital Ocean. Dynamic DNS style.
#API info here:
#https://developers.digitalocean.com/#domains-list

#your domain ID
domain_id="XXX"
#record to update
record_id="XXX"
#digitalocean client_id
client_id="XXX"
#your api key
api_key="XXX"

### don't change ###
ip="$(curl  http://ipecho.net/plain)"
api="https://api.digitalocean.com/domains/$domain_id/records/$record_id/edit"
echo content="$(curl -s "$api?data=$ip&client_id=$client_id&api_key=$api_key")"