Last updated 1 month ago

Fast API Overview

NOTE: This product is in Early Access

Welcome! You will find useful information regarding the design and specifications of the Fast API.

Use of the Fast Developer Platform is subject to our Developer Terms of Use.

Fast API Overview

Got questions? Concerns? Contact Fast at devrel@fast.co.

High Level Diagrams

New buyer clicks Fast Checkout

This diagram covers the high level flow for when a new buyer clicks the Fast checkout button.

New buyer clicks Fast Checkout ]

Buyer interacts with Fast Checkout

This diagram covers the high level flow for when a buyer interacts with Fast Checkout.

Buyer interacts with Fast Checkout

Buyer canceled order

This diagram covers the specific case when a user cancels an order in Fast Checkout.

Buyer canceled order

Checkout timer ended & fraud check

This diagram covers our high level post processing steps prior to payment capture.

Checkout timer ended

Process payment

This diagram covers the high level flows for payment capture. NOTE: there are 2 possible flows dependent on the seller's configurable & direct capture configuration.

Process payment

Refund Order

This diagram covers the high level flow for refunding an order.

Refund order