---
title: "Order Relation Expansion"
description: "Learn more about Order Relation Expansion in this Ordering API guide for developers integrating the platform."
canonical: https://docs.ordering.co/api-reference/guides/orders-special-request/
---

# Order Relation Expansion

Order list and detail reads use `params` to request related data.

```text
https://api.ordering.co/v400/en/YOUR_PROJECT/orders?params=paymethod,products
```

Use `paymethod` (singular) and `attachments` (plural) when requesting those relations. Include linking IDs or sparse fields where the operation requires them.

Do not request the `history` relation unless the specific operation documents it. Business, customer, driver, attachment, and payment data can be sensitive; request only the relations needed for the task.