The Trade Me API doesn't allow you to auto top-up from a Third Party System as there is no API call for this function.
There is a solution to this however as Trade Me does allow a new credit feature through the My Products page on their site.
- Login to www.trademe.co.nz
- Click on "My Trade Me"
- under the "Selling" header click "My Products"
- Click the blue "Get Started" button (If you have previously configured My Products then this and the next step may not apply)
- Select "Skip this step..." and click "Next"
- On the right hand side of the page click the "Settings" link
- In this page is a function called "Auto Billing" which enables your credit card to be charged just once a week for all your charges from TM.
This is the process we are recommending for customers to use.