Table of contents Overview Card and Mobile Payments How to collect card payment Code Examples Collect a payment Payment data parameters Payment results Using a custom button Checkout API Direct M-Pesa STK-Push React and Vue Examples Vue Example React JS Example WordPress Easy Digital Download WooCommerce Flutter (Mobile) Shopify Bubble.io (no-code) Send Payments Authentication PSD2 and Digital Keys Send Money Send Money Status Wallet as a service Wallets API Refunds WebHooks Webhook Setup Payment collection events Send money events Chargeback events REST API Plugins and SDKs Python SDK PHP SDK Testing Errors reference Support