> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gettrxn.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Accept and verify cryptocurrency payments against invoices with TRXN.

TRXN enables businesses to accept cryptocurrency as payment while managing pricing in fiat currency (USD). Define products with fiat prices, generate invoices, and verify blockchain payments automatically.

## How it works

<Steps>
  <Step title="Define products and prices">
    Create products with fiat-denominated prices. Set optional slippage margins to account for crypto price fluctuations.
  </Step>

  <Step title="Generate invoices">
    Create invoices with line items for your customers. Invoices track amounts owed in fiat.
  </Step>

  <Step title="Receive crypto payments">
    Customers pay using cryptocurrency (BTC, ETH). Assign crypto addresses to receive payments.
  </Step>

  <Step title="Verify and allocate">
    TRXN monitors blockchain data, converts amounts to fiat at the transaction time, and allocates payments to outstanding invoices.
  </Step>
</Steps>

## Key features

<CardGroup cols={2}>
  <Card title="Fiat pricing, crypto settlement" icon="dollar-sign">
    Price products in USD. Accept BTC and ETH. TRXN handles the conversion math.
  </Card>

  <Card title="Subscriptions" icon="rotate" href="/guides/subscriptions">
    Multi-phase subscriptions with trials, promotional pricing, and automatic invoice generation.
  </Card>

  <Card title="Payment verification" icon="shield-check" href="/guides/transaction-verification">
    Automatic blockchain verification with historical price lookup at the exact transaction time.
  </Card>

  <Card title="Webhooks" icon="webhook" href="/guides/webhooks">
    30+ event types with HMAC-SHA256 signed payloads for real-time integrations.
  </Card>

  <Card title="Sandbox mode" icon="flask" href="/guides/sandboxes">
    Isolated testing environment with separate data, tokens, and full API access.
  </Card>

  <Card title="Multi-tenant" icon="building">
    Account-based tenancy with team management, roles, and per-account data isolation.
  </Card>
</CardGroup>

## Supported cryptocurrencies

| Currency | Symbol | Address format              |
| -------- | ------ | --------------------------- |
| Bitcoin  | BTC    | Standard Bitcoin addresses  |
| Ethereum | ETH    | ERC-20 compatible addresses |

## Next steps

<CardGroup cols={2}>
  <Card title="Quickstart" icon="bolt" href="/quickstart">
    Get up and running in 5 minutes.
  </Card>

  <Card title="API reference" icon="code" href="/api-reference/authentication">
    Explore the full API.
  </Card>
</CardGroup>