---
url: /docs/learn.md
description: >-
  Guides covering key BlindPay concepts: instances, API keys, webhooks, and
  billing.
---

# Learn

Concepts that apply to every integration, regardless of whether you build on the fiat or stablecoin flavor of the API.

## In this section

| Guide | What it covers |
| --- | --- |
| [Instances](/learn/instances) | Development vs. production environments, and how to create one |
| [Sandbox vs. production](/learn/sandbox-vs-production) | Behavioral differences, test tokens, and simulating failures |
| [Billing](/learn/billing) | Fee structure and invoices |
| [Partner fees](/learn/partner-fees) | Add markup to transactions and withdraw monthly revenue |
| [API keys](/learn/api-keys) | Creating keys, authentication, and security |
| [Webhooks](/learn/webhooks) | All events, setup, and verification |