# September 2025

- [September 19](https://docs.ecwid.com/changelog/september-2025/september-19.md)
- [Store ID is now required for external apps' authentication](https://docs.ecwid.com/changelog/september-2025/september-19/store-id-is-now-required-for-external-apps-authentication.md)
- [Shipping discount data in order details](https://docs.ecwid.com/changelog/september-2025/september-19/shipping-discount-data-in-order-details.md)
- [Tax deduction field for order items](https://docs.ecwid.com/changelog/september-2025/september-19/tax-deduction-field-for-order-items.md)
- [Fixed price promotions](https://docs.ecwid.com/changelog/september-2025/september-19/fixed-price-promotions.md)


---

# 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://docs.ecwid.com/changelog/september-2025.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.