> This page is for Cash App Pay Partner API.

> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://developers.cash.app/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://developers.cash.app/_mcp/server.

# How Cash App Pay Works

Cash App currently supports three main use cases:

* Mobile-Ecommerce
* Web-Ecommerce
* POS (Point-of-Sale)

\


# Mobile-Ecommerce

The Customer visits a mobile ecommerce app(or site) and uses their Cash App to pay for goods and services.

\
\


# Web-Ecommerce

The Customer visits a web-based ecommerce site and pays for items by scanning the QR code generated at checkout using Cash App on their phone.

\
\


# POS

Customer goes to a merchant and uses a Point-of-Sale (POS) device, for example, like the Square POS device.

\
\


To learn more about how Cash App Pay works on different devices, see the following:

* [Cash App Pay on Mobile devices](/cash-app-pay-partner-api/guides/product-overview/cash-app-pay-on-mobile-devices)
* [Cash App Pay on Desktop and POS devices](/cash-app-pay-partner-api/guides/product-overview/cash-app-pay-on-desktop-and-pos-devices)