# Direct API Orders

- [Overview](/direct-api-orders/overview.md): Prior to processing an order, please review the "Universal Integration Features."
- [Environments](/direct-api-orders/environments.md)
- [Postman](/direct-api-orders/postman.md)
- [Sandbox Payment Method (Simulator)](/direct-api-orders/sandbox-payment-method-simulator.md)
- [Create Access Token](/direct-api-orders/create-access-token.md)
- [Order Flow](/direct-api-orders/order-flow.md)
- [Customer Initiated Orders](/direct-api-orders/order-flow/custom-integration-setup-and-integration.md)
- [Merchant Initiated Orders](/direct-api-orders/order-flow/merchant-initiated-orders.md)
- [Options](/direct-api-orders/order-flow/options.md)
- [GET /options](/direct-api-orders/order-flow/options/get-options.md)
- [POST /orders](/direct-api-orders/order-flow/post-orders.md): When a user selects an Optty integrated APM, you should send through the order via this method.
- [GET /orders](/direct-api-orders/order-flow/get-orders.md)
- [POST /void](/direct-api-orders/order-flow/post-void.md)
- [POST /capture](/direct-api-orders/order-flow/post-capture.md)
- [POST /orders/{reference}/refund](/direct-api-orders/order-flow/post-orders-reference-refund.md)
- [GET /orders/{reference}/refund](/direct-api-orders/order-flow/get-orders-reference-refund.md)