Get a KashFlow Account
Before you can use any of the API functions or the great tools listed here, you will need a KashFlow account.
KashFlow accounts are easy to create, you just register online. The account is immediately accessible and can be used for 60 days without any payment or obligation.
KashFlow is a stand-alone product in it's own right and it allows you to very easily manage all of the day to day accounting for your business.
Read more about KashFlow here.
Register for a free account here.
Once you have a KashFlow account, you will need to enable the API.