Usage charges with idempotency

[August0]

Hi All,

I'm building a shopify integration in which we need to bill our customers ( the shopify store). The integration creates a recurring charge and then calls the endpoint Create a Usage Charge  to bill the store.

I cannot see that this endpoint has the option to provide an idempotencyKey and want to avoid the scenario in which a store is charged multiple times.

I have 3 questions:

* Does this endpoint support idempotency, but it's not documented?

* Do we need to use a different endpoint (maybe GraphQL?) in order to do a recurring billing that supports idempotency?

* If none of the above apply, what is the recommended way to create a variable charge to a store?

Thanks a lot!

[Liam]

Hi August0,

There is an AppUsageRecord object on the GraphQL API which has an `idempotencyKey` field which is a unique key generated by the client to avoid duplicate charges. It sounds like this is what you'll want to be working with.