> For the complete documentation index, see [llms.txt](https://docs.faspay.co.id/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.faspay.co.id/merchant-integration/api-reference-1/faspay-billing-api.md).

# Faspay Billing API

Faspay Billing API is a system used to create an API-based online bill. Apart from being in the form of a dashboard, Faspay Billing will also support in the form of an API to facilitate if there are merchants who have qualified developer resources.

**Transaction Flow Faspay Billing API**

![Faspay Billing API Flow](/files/-MOUWWDXkbX_er29_z7w)

<table><thead><tr><th width="72">No</th><th>Process</th></tr></thead><tbody><tr><td>1</td><td>Merchant sends a CreateBilling API request to the Faspay server which functions to make online bills.</td></tr><tr><td>2</td><td>Faspay will provide a response link payment containing the bill.</td></tr><tr><td>3</td><td>Merchant will provide a billing link that must be paid by the customer.</td></tr><tr><td>4</td><td>Customer will make a payment which will be redirected to the Faspay Xpress page</td></tr><tr><td>5</td><td>After the payment is successful, Faspay will send a callback to the url that has been prepared by the merchant.</td></tr></tbody></table>