> 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/introduction/systems-and-operations.md).

# Systems & Operations

## Production URLs

Use the following URLs to connect to sFOX production APIs. For testing, see Sandbox URLs.

<table><thead><tr><th width="281">API</th><th>URL</th></tr></thead><tbody><tr><td><strong>REST API</strong></td><td><strong><code>https://api.sfox.com</code></strong></td></tr><tr><td><strong>REST API</strong><br>(<a href="/rest-api/market-data/get-candlesticks.md">Candlestick / OHLCV </a>Data)</td><td><strong><code>https://chartdata.sfox.com</code></strong></td></tr><tr><td><strong>WebSocket API</strong></td><td><strong><code>wss://ws.sfox.com/ws</code></strong></td></tr><tr><td><strong>FIX API - Order Entry</strong></td><td><strong><code>fix.sfox.com:5001</code></strong></td></tr><tr><td><strong>FIX API – Market Data</strong></td><td><strong><code>fix-md.sfox.com:5001</code></strong></td></tr></tbody></table>

## Sandbox URLs

Use the following URLs to test your API connectivity.&#x20;

{% hint style="info" %}
API keys are separate from production. Sign in to the [sandbox interface](https://beta.sfox.com) to create an API key. Contact us at <support@sfox.com> for assistance configuring and funding your sandbox account.
{% endhint %}

{% hint style="warning" %}
Sandbox hosts a subset of order books and liquidity does not reflect production. Sandbox supports all functionality except transfers.
{% endhint %}

<table><thead><tr><th width="281">API</th><th>URL</th></tr></thead><tbody><tr><td><strong>REST API</strong></td><td><strong><code>https://api.staging.sfox.com</code></strong></td></tr><tr><td><strong>WebSocket API</strong></td><td><strong><code>wss://ws.staging.sfox.com/ws</code></strong></td></tr><tr><td><strong>FIX API - Order Entry</strong></td><td><strong><code>fix.staging.sfox.com:5001</code></strong></td></tr><tr><td><strong>FIX API – Market Data</strong></td><td><strong><code>fix-md.staging.sfox.com:5001</code></strong></td></tr></tbody></table>

## Availability Zones

The infrastructure for the sFOX platform is hosted in **US-EAST-1 (AWS)** within multiple availability zones:

* use1-az6
* use1-az1
* use1-az2


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