# Batch Availability

The BatchAvailability request allows you to determine availability on a large scale. This API call is designed to enable fetching all activity and activity options for a single date or date range. When a single activity is provided, the API will return the activity availability for the date or date range requested. When an activity is not provided, the API will return all activities and options for the date or date range requested.

{% hint style="info" %}
**Note:** Requests for batch availability can be made no further than 120 days out. Back Availability for historical dates is not permitted. Date ranges between the StartDate and EndDate cannot be more than 120 days.
{% endhint %}


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# Agent Instructions: Querying This Documentation

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

```
GET https://docs.zaui.com/io/api-function-definitions/batch-availability.md?ask=<question>
```

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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.