# Developer Guides — Build with CryptoAPIs

Practical, step-by-step guides for building crypto payments and blockchain apps on the CryptoAPIs REST API — non-custodial by design, across 20+ blockchains. Every guide leads with real requests you can run today.

## Payments

- **[How to accept crypto payments](https://cryptoapis.io/guides/accept-crypto-payments)** — Take Bitcoin, Ethereum and stablecoin payments to an address you control; watch it with a webhook and sweep by signing offline.
- **[How to automate payment forwarding](https://cryptoapis.io/guides/automate-payment-forwarding)** — Auto-forward incoming deposits to your treasury without a custodian: watch, prepare an unsigned sweep, sign offline and broadcast, on a loop.

## Wallets & events

- **[How to build a crypto wallet](https://cryptoapis.io/guides/build-a-crypto-wallet)** — Ship a wallet where users keep their keys: derive addresses from an xPub, track balances and transactions across 20+ chains, and send by signing offline.
- **[How to monitor addresses with webhooks](https://cryptoapis.io/guides/monitor-addresses-with-webhooks)** — Get a real-time callback the moment an address receives a payment, a token transfer or a new block. No polling, no node.

## AI

- **[How to use CryptoAPIs with AI agents (MCP)](https://cryptoapis.io/guides/use-cryptoapis-with-ai)** — Connect blockchain tools to Claude Desktop, Cursor or n8n over the Model Context Protocol; read balances and transactions, watch addresses and sign locally across 20+ chains.