# 2328.io API Documentation > Technical specification for cryptocurrency payment processing and withdrawal integration with 2328.io. Covers authentication, payments, webhooks, payouts, static wallets, and exchange rates. ## Introduction - [General Information](https://doc.2328.io/md/en/general): Technical specification for cryptocurrency payment processing and withdrawal integration with 2328.io. - [Authentication & Request Signing](https://doc.2328.io/md/en/authentication): Sign API requests with HMAC-SHA256 using your project UUID and API key. - [References](https://doc.2328.io/md/en/references): Network codes, currency-network mappings, and payment status values used across the 2328.io API. - [Webhook Notifications](https://doc.2328.io/md/en/webhooks): Receive real-time payment and payout status updates via HMAC-signed webhooks. - [AI Integration](https://doc.2328.io/md/en/ai-integration): Integrate 2328.io into your application in minutes using AI assistants like Claude, ChatGPT, Cursor, and GitHub Copilot. ## Payments and Payouts - [Payment API](https://doc.2328.io/md/en/payments): Create and manage cryptocurrency payment sessions with the 2328.io Payment API. - [Payout API](https://doc.2328.io/md/en/payouts): Send withdrawals from your merchant balance to any blockchain address. - [Static Wallets](https://doc.2328.io/md/en/static-wallets): Permanent deposit addresses tied to a specific order or user, perfect for recurring and long-term payments. ## Info - [Balance](https://doc.2328.io/md/en/balance): Get the list of merchant accounts with their balances per currency. - [Exchange Rates](https://doc.2328.io/md/en/exchange-rates): Public endpoint for fetching current exchange rates between fiat and cryptocurrencies. ## Optional - [Full documentation (single file)](https://doc.2328.io/llms-full.txt): All documentation concatenated into one file for LLM context