For AI agents: visit https://developers.slopepay.com/llms.txt for an index of all pages formatted in Markdown and endpoints in OpenAPI.

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Home Guides API Reference

Guides

Home Guides API Reference

Getting Started

Checkout integration options
Migrating from V3 API
Demo site & sample code
End to end checkout API flow
Flow of Funds
Order statuses and lifecycle
Glossary

Backend API

Authentication
Logging & Errors
Idempotency & external IDs
Pagination for list endpoints
Sandbox testing and mock data
Rate limits

Frontend API

Slope.js SDK API
Event callbacks
Low-code redirect flow
Pre Qualify flow (optional)
Draw Funds (optional)

No Code Integration

No code integration overview

Utilities

Customer Authorization
Webhooks

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Sandbox testing and mock data

Testing the sandbox environment and simulating different approval and error behaviors