# Klap

> Non-custodial crypto payments

Keep Liquidity Always Permissionless. A merchant creates a charge, the payer sends funds directly to a predicted on-chain address, Klap detects and distributes it — without ever holding the money itself. This site covers the REST API, the Node.js SDK, and the TypeScript types together, by resource.

## Table of Contents

### Overview

- [How it works](https://docs.klappay.com/how-it-works.md)
- [Getting started](https://docs.klappay.com/getting-started.md)
- [Authentication](https://docs.klappay.com/authentication.md)

### Resources

- [Charges](https://docs.klappay.com/charges.md)
- [Webhooks](https://docs.klappay.com/webhooks.md)
- [Sandbox](https://docs.klappay.com/sandbox.md)
- [Metrics](https://docs.klappay.com/metrics.md)
- [Distributions](https://docs.klappay.com/distributions.md)
- [Recipients](https://docs.klappay.com/recipients.md)
- [Networks & tokens](https://docs.klappay.com/networks.md)

### Guides

- [Build a checkout flow](https://docs.klappay.com/guides/checkout-flow.md)
- [Real-time (SSE)](https://docs.klappay.com/realtime.md)
- [Errors](https://docs.klappay.com/errors.md)
- [Tree-shaking and minimal bundles](https://docs.klappay.com/sdk/tree-shaking.md)

### Tools

- [AI assistants (MCP)](https://docs.klappay.com/mcp.md)