> ## Documentation Index
> Fetch the complete documentation index at: https://docs.usetapp.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Tapp

> Tapp is the proof of work for how to build a product system on Rails.

Tapp is the proof of work for how to build a product system on Rails. It shows one way to combine user actions, merchant acceptance, and Rails settlement underneath a customer-facing flow.

## What Tapp demonstrates

* Product behavior built on top of Rails settlement
* Merchant acceptance of payment
* Settlement visibility on both sides of the flow
* An implementation reference for Rails integrators

## Why it matters

Tapp is not a separate infrastructure offering. It is the working reference for how Rails can be used in a real product.