---
id: "T:cAlgo.API.RateLimitException"
kind: "class"
namespace: "cAlgo.API"
url: "https://help.ctrader.com/ctrader-algo/references/General/RateLimitException/"
---

> Documentation index for agents: https://help.ctrader.com/ctrader-algo/llms.txt · machine index: https://help.ctrader.com/ctrader-algo/api.json

# RateLimitException (class)

Represents errors that occur when API rate limits are exceeded.

Environments: Desktop supported · CLI supported · Cloud supported.

## Definition

```csharp
public sealed class RateLimitException : Exception
```

Available since cAlgo.API 5.2.

## Examples

C#:

```csharp
protected override void OnStart()
{
    ExecuteMarketOrder(TradeType.Buy, SymbolName, Symbol.VolumeInUnitsMin, "Sample");
}

protected override void OnException(Exception exception)
{
    if (exception is RateLimitException)
        Print("API rate limit exceeded, slow down requests: {0}", exception.Message);
}
```

Python:

```python
def on_start(self):
    api.ExecuteMarketOrder(TradeType.Buy, api.SymbolName, api.Symbol.VolumeInUnitsMin, "Sample")

def on_exception(self, exception):
    if isinstance(exception, RateLimitException):
        api.Print(f"API rate limit exceeded, slow down requests: {exception.Message}")
```