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

# Overview

> Add crypto to your application using REST, FIX and WebSocket APIs.

<Tabs>
  <Tab title="API">
    Get [market data](/api-reference/websockets/market-data), create [orders](/api-reference/endpoints/orders), execute [held-rate quotes](/api-reference/endpoints/quotes), and [transfer](/api-reference/endpoints/fiat-transfers) assets with [Paxos API v2.0](/api-reference).
  </Tab>

  <Tab title="FIX">
    Leverage the [Paxos FIX API](/guides/crypto-brokerage/fix/reference) to trade crypto.

    Learn more about [FIX](/guides/crypto-brokerage/fix/index) and check out the [onboarding](/guides/crypto-brokerage/fix/onboard) and [certification](/guides/crypto-brokerage/fix/certify) guides to get started.
  </Tab>

  <Tab title="WebSocket">
    Construct the state of the order book and stream executed orders in real-time using the [Paxos WebSocket API](/guides/developer/api-websocket).

    Learn more about what you can do with [WebSocket](/guides/developer/api-websocket) or check out the [quickstart](/guides/crypto-brokerage/websocket) for a hands-on introduction.
  </Tab>
</Tabs>