# Rushly ## Docs - [Create an Order](https://docs.rushly.us/api-reference/create-order.md): Create a same-day delivery order for a customer - [Authentication](https://docs.rushly.us/authentication.md): Authenticate requests with your store's API key - [Delivery Tiers](https://docs.rushly.us/delivery-tiers.md): The three delivery speeds you can offer at checkout - [Introduction](https://docs.rushly.us/introduction.md): Add same-day delivery to your store's checkout with one API call - [Order Lifecycle](https://docs.rushly.us/order-lifecycle.md): Every status an order moves through, and how to follow along - [Quickstart](https://docs.rushly.us/quickstart.md): Create your first delivery order in one request