> ## 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

> Leverage the FIX protocol for crypto trading.

FIX (Financial Information eXchange) is an electronic messaging protocol widely adopted by financial institutions to transmit trading activity such as submitting or canceling orders and receiving execution information. The [FIX API](/guides/crypto-brokerage/fix/reference) is based on FIX 4.2 and modeled after common Forex FIX implementations.

## Get Started

<CardGroup cols={2}>
  <Card title="Onboarding" href="/guides/crypto-brokerage/fix/onboard" icon="user-plus">
    Set Up a Paxos Account, configure connection then certify.
  </Card>

  <Card title="Certification" href="/guides/crypto-brokerage/fix/certify" icon="certificate">
    Test and verify the FIX implementation in Sandbox before going to Production.
  </Card>

  <Card title="Best Practices" href="/guides/crypto-brokerage/fix/best-practices" icon="lightbulb">
    Learn about connection management, sequence number management and testing.
  </Card>

  <Card title="FIX API Reference" href="/guides/crypto-brokerage/fix/reference" icon="book-open">
    Message types, required tags, and encoded values for Paxos FIX 4.2.
  </Card>

  <Card title="Data Dictionary" href="/guides/crypto-brokerage/fix/reference/data-dictionary" icon="file-code">
    QuickFIX-compatible FIX 4.2 data dictionary for Paxos.
  </Card>
</CardGroup>