How to create usage charge?

[chintankotadia]

I would like to charge the store based on the number of orders placed per month if the store crosses the limit specified in recurring billing.

For e.g., if the merchant has selected the basic recurring plan of $10 and it crosses the 1000 orders limit per month then I would like to charge $10 Recurring fees + (100 more orders * 0.01$) = $11

It is mentioned in the wiki over here but I would like to charge them instantly without redirecting them for approval. How can I do this one?

Thank you.

[chintankotadia]

@Kyon147 : Thoughts?

[Kyon147]

You cannot use the Shopify billing api and not as for approval.

So you create the usage charge following the wiki and they have to approve it.

Once approved you can bill them up to the amount in the charge.