Square

Overview

Square handles both online and in-person payments — credit cards, Apple Pay, Google Pay, and POS hardware. APIs cover payments, subscriptions, invoices, catalog, inventory, and customers. Popular for businesses that sell both online and in stores.

Instructions

Step 1: Online Payment

// lib/square.ts — Process a payment
import { Client, Environment } from 'square'

const client = new Client({
  accessToken: process.env.SQUARE_ACCESS_TOKEN!,
  environment: Environment.Production,
})