> For the complete documentation index, see [llms.txt](https://gate402.gitbook.io/gate402-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gate402.gitbook.io/gate402-docs/start-here.md).

# Start Here

Welcome to the Gate402 documentation!

Turn any API into a paid API in 5 minutes

Gate402 is a payment proxy that lets you monetize any API instantly. No code changes to your API required. Just point Gate402 at your API, set a price, and start earning crypto.

## Sections

* [**Introduction**](broken://pages/2791e855d99062158509b900555862c6fa200a3f): What is Gate402 and why use it?
* [**Quick Start**](broken://pages/7d2fdfeba6ed838daf763cd296bc2be3b3a30dc5): Get up and running in 5 minutes.
* [**Core Concepts**](broken://pages/1fa0f2271ff1765c338bf1a75edff80e9efba6a0): Understand how the x402 protocol works within Gate402.
* [**Examples**](broken://pages/46f8b04c22aafa8449b643eeb7181d4b7179daf0): Real-world scenarios (Weather, AI, MCP).
* [**Troubleshooting**](broken://pages/0b4180dc0a890aa5e9c651fd76813be1ad3591ad): Common issues and how to fix them.

{% hint style="success" %}
Ready to monetize your API?

<a href="https://gate402.io/signup" class="button primary">Sign Up Now</a>
{% endhint %}