# Slope API Documentation > Welcome to the Slope developer hub. You'll find comprehensive guides and documentation to help you start working with Slope as quickly as possible, as well as support if you get stuck. Let's jump right in! This file lists one part of the documentation. The full index is at https://developers.slopepay.com/llms.txt. ## Guides: Getting Started - [Checkout integration options](https://developers.slopepay.com/docs/checkout-integration-options.md) - [Migrating from V3 API](https://developers.slopepay.com/docs/rfc-v4-api.md) - [Demo site & sample code](https://developers.slopepay.com/docs/getting-started.md): We recommend playing around at [demo.slopepay.com](https://demo.slopepay.com) to get a sense of what an integrated widget experience is like. - [End to end checkout API flow](https://developers.slopepay.com/docs/payment-flow.md) - [Flow of Funds](https://developers.slopepay.com/docs/flow-of-funds.md): This page describes the general flow of funds once an order is placed. Slight variations depending on the integration need may exist. - [Order statuses and lifecycle](https://developers.slopepay.com/docs/order-statuses-and-lifecycle.md) - [Glossary](https://developers.slopepay.com/docs/key-terms.md): A guide of common key terms used within the Slope ecosystem ## Guides: Backend API - [Authentication](https://developers.slopepay.com/docs/authentication-1.md) - [Logging & Errors](https://developers.slopepay.com/docs/errors-1.md) - [Idempotency & external IDs](https://developers.slopepay.com/docs/idempotency-1.md) - [Pagination for list endpoints](https://developers.slopepay.com/docs/pagination-1.md) - [Sandbox testing and mock data](https://developers.slopepay.com/docs/testing.md): Testing the sandbox environment and simulating different approval and error behaviors - [Rate limits](https://developers.slopepay.com/docs/rate-limits.md) ## Guides: Frontend API - [Slope.js SDK API](https://developers.slopepay.com/docs/slope-checkout-js.md) - [Low-code redirect flow](https://developers.slopepay.com/docs/low-code-redirect-flow.md) - [Pre Qualify flow (optional)](https://developers.slopepay.com/docs/pre-qualify-flow.md) - [Draw Funds (optional)](https://developers.slopepay.com/docs/draw-funds-optional.md) ## Guides: No Code Integration - [No code integration overview](https://developers.slopepay.com/docs/lowno-code-overview.md) ## Guides: Utilities - [Customer Authorization](https://developers.slopepay.com/docs/customer-authorization.md) - [Webhooks](https://developers.slopepay.com/docs/webhooks-overview.md) - [Event Types](https://developers.slopepay.com/docs/event-types.md) - [Event Schema](https://developers.slopepay.com/docs/schema.md) - [Signature Verification](https://developers.slopepay.com/docs/signature-verification.md)