# 429 error handling

An error with the status code 429 is an API rate limit error.

However, the default module error type for an error code between 400 - 500 is always a `RuntimeError`.

There are advantages to handling a 429 error as a `RateLimitError` instead.

## RuntimeError handling vs RateLimitError handling

In a scenario with scheduling turned on, if one of the scenario modules throws a `RuntimeError`, your scenario will break and retry to run according to the number of consecutive errors from your scenario settings (the default is 3 times).

If the number of consecutive errors is consumed, the scenario scheduling will be switched off and you will need to manually switch your scenario scheduling on again.

To prevent this, use the module error type `RateLimitError` to handle the 429 error. This error type has the same functionality as `ConnectionError` and returns the warning message instead of the error sign.

The advantage of using `RateLimitError` is that, instead of using the number of consecutive errors and then switching the scheduling off, the retries continue with [increasing time intervals](https://help.make.com/types-of-errors#QJ_-W).

For example:

* A scenario with scheduling turned on suddenly has one module throw a `RateLimitError`.
* It will retry after 1 minute.
* If it throws the `RateLimitError` again, it will retry after 2 minutes.
* Repeatedly the scenario increases the interval by 1, 2, 5, 10 minutes, and 1, 3, 12, and 24 hours.

{% tabs %}
{% tab title="Example code to handle 429 errors" %}

```javascript
{
  "response": {
    "error": {
      "429": {
        "type": "RateLimitError",
        "message": "{{body.message}}"
      },
      "message": "{{body.message}}"
    }
  }
} 
```

{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://developers.make.com/custom-apps-documentation/best-practices/base/429-error-handling.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.