Add Rappi (#2492)

README.md

@@ -1228,6 +1228,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Flipkart Marketplace](https://seller.flipkart.com/api-docs/FMSAPI.html) | Product listing management, Order Fulfilment in the Flipkart Marketplace | `OAuth` | Yes | Yes |
 | [Lazada](https://open.lazada.com/doc/doc.htm) | Retrieve product ratings and seller performance metrics | `apiKey` | Yes | Unknown |
 | [Mercadolibre](https://developers.mercadolibre.cl/es_ar/api-docs-es) | Manage sales, ads, products, services and Shops | `apiKey` | Yes | Unknown |
+| [Rappi](https://dev-portal.rappi.com/) | Manage orders from Rappi's app | `OAuth` | Yes | Unknown |
 | [Shopee](https://open.shopee.com/documents?version=1) | Shopee's official API for integration of various services from Shopee | `apiKey` | Yes | Unknown |
 | [Wegmans](https://dev.wegmans.io) | Wegmans Food Markets | `apiKey` | Yes | Unknown |
 | [WooCommerce](https://woocommerce.github.io/woocommerce-rest-api-docs/) | WooCommerce REST APIS to create, read, update, and delete data on wordpress website in JSON format | `apiKey` | Yes | Yes |