> For the complete documentation index, see [llms.txt](https://docs.sfox.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sfox.com/fix-api/quickfix-guide.md).

# QuickFIX Guide

## About QuickFIX

QuickFIX Engine is an open source implementation of the FIX Protocol. To learn more, visit:

{% embed url="<https://quickfixengine.org/>" %}

## QuickFIX/C++

QuickFIX/C++ is a FIX implementation for C++, Python, and Ruby. Follow these steps to start using sFOX's FIX API with QuickFIX/C++:

1. Compile [QuickFIX/C++](https://github.com/quickfix/quickfix/tree/master/examples/tradeclient): `cmake` then `make` in the root directory
2. Use the [`stunnel` Configuration](#stunnel-configuration) below with `stunnel tunnel.conf`
3. Run the [Test Client](#undefined) `./bin/tradeclient <file_name>.cfg`

{% hint style="warning" %}
Make sure to add your API key to the application (recommended to so do in code). Following these steps without adding your API Key will result in failure to connect
{% endhint %}

#### stunnel Configuration

`tunnel.conf`

```
socket = l:TCP_NODELAY=1
socket = r:TCP_NODELAY=1

sslVersionMin = TLSv1.2
sslVersionMax = TLSv1.3

debug = debug
client = yes
foreground = yes

[order]
accept = 5001
connect = fix.sfox.com:5001
sni = fix.sfox.com
```

#### Test Client

`<file_name>.cfg` (i.e. sfox.cfg)

{% hint style="warning" %}
Update the `SenderCompID` to the name of your choice
{% endhint %}

```ini
[DEFAULT]
ConnectionType=initiator
ReconnectInterval=60

[SESSION]
BeginString=FIX.4.4
SenderCompID=<your_sender_comp_id>
HeartBtInt=10
TargetCompID=SFOX
UseDataDictionary=N
SocketConnectPort=5001
SocketConnectHost=127.0.0.1
StartTime=00:00:00
EndTime=00:00:00
ResetOnLogon=Y
LogonTimeout=60
FileStorePath=./stores
```

## QuickFIX/J (Java)

{% hint style="warning" %}
LOGON responses will arrive after the heart beat interval, you will either need to set the heart beat interval low or set *LogonTimeout > HeartBtInt*&#x20;
{% endhint %}

{% hint style="warning" %}
UseSNI: You must set UseSNI=Y, which is supported in >=2.3.0
{% endhint %}

{% hint style="info" %}
`stunnel` is required for Java versions before 1.17
{% endhint %}

## Quickfix/N (C#)

Example Config

```
[DEFAULT]
ConnectionType=initiator
ReconnectInterval=60

[SESSION]
BeginString=FIX.4.4
SenderCompID=STG-USER-MD-01 # your assigned sender comp id
HeartBtInt=10
TargetCompID=SFOX
UseDataDictionary=N
StartTime=00:00:05
EndTime=00:00:00
StartDay=Sunday
EndDay=Sunday
ResetOnLogon=Y
LogonTimeout=60
FileStorePath=./stores
SSLEnable=Y
SocketConnectPort=5001
SocketConnectHost=fix-md.staging.sfox.com # or fix.staging.sfox.com for OE sessions
```


---

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