A Postmates account is required to add this integration. Please enter the customer key and api token they give you in the Account -> Settings -> Postmates Form.
You can find your Postmates information in your Restaurant Partner account for Postmates. Please use the Production Key for the api token.
Postmates will quote a delivery fee that will be passed on to your customer (You will receive these funds and are responsible for distributing it to postmates). There is no additional commission for postmates.
You will be billed for postmates delivery charges from your postmates account.
If you work with Postmates all deliveries will be handled by the Postmates service. You will not be able to set delivery zones or delivery fee as it will default to what postmates will accept.