> For the complete documentation index, see [llms.txt](https://docs.commercelayer.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.commercelayer.io/core-api-reference/packages.md).

# Packages

Packages are physical packs or boxes stored in a stock location with specific sizes and ready for shipment. Each stock location in a market can have its own set of defined packages with a pre-defined package `length`, `weight`, and `height`. That information about the package dimensions — required for the package creation — is used by [shipping carriers](/core-api-reference/carrier_accounts.md) to calculate shipping rates.

<details>

<summary>Data model</summary>

Check the related [ER diagram](/data-model/shipping/parcels-packages-and-pickups.md) and explore the flowchart that illustrates how the package resource relates to the other API entities.

</details>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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://docs.commercelayer.io/core-api-reference/packages.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.