> For the complete documentation index, see [llms.txt](https://developer.rategain.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.rategain.com/our-products/smart-distribution/pre-book/pre-book-api.md).
# Pre Book API
**Overview**
The **Precheck API** is a validation API used to re-check and re-validate room availability, rates, and restrictions before finalizing a booking. This step ensures the accuracy of the booking request and verifies that no changes have occurred since the initial search or shopping process.
#### Request Example
```xml
```
#### Response Example:
```xml
```
---
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