> For the complete documentation index, see [llms.txt](https://wilcode-net.gitbook.io/wilcode-apps/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wilcode-net.gitbook.io/wilcode-apps/amazon-importer-app/faq/how-price-and-stock-auto-sync-works.md).

# How price and stock auto-sync works

Auto-sync keeps your Shopify product prices and availability aligned with Amazon automatically, so you don't have to check products by hand.

## What gets synced

* **Price** — when the Amazon price changes, the app updates the Shopify price and re-applies your [markup](/wilcode-apps/amazon-importer-app/how-to/set-up-pricing-and-markup.md) to the new value.
* **Availability** — when a product goes in or out of stock on Amazon, the app updates its availability in your store.

You can enable price sync, stock sync, or both — at the store level, and per product or per variant.

## The 1,500 variants per day limit

Auto-sync updates up to **1,500 product variants** within each 24-hour cycle. If your store has more variants than that, the remaining ones are queued for the next sync cycle and processed in **import order**.<br>

{% hint style="info" %}
The limit counts **variants**, not products. A single product with several sizes and colors can use many variants of your daily allowance.
{% endhint %}

## How stock is read

{% hint style="warning" %}
The app does **not** track exact stock quantities from Amazon. It only reads the **availability status** — whether a product is in stock or out of stock.
{% endhint %}

When a product is out of stock on Amazon and stock sync is on, the app marks it as unavailable in your store (it turns off **Continue selling when out of stock**).

When the product returns to stock on Amazon, it becomes available again automatically.

<figure><img src="/files/V8KMieggNE2vSZjZZRwU" alt=""><figcaption><p><strong>Continue selling when out of stock</strong></p></figcaption></figure>

{% hint style="warning" %}
**IMPORTANT**

If **Track quantity** is turned off, the app won't be able to keep the product's availability in sync with Amazon. Price updates will still work as expected, but the **Sold out** status may no longer be accurate
{% endhint %}

***

{% hint style="info" icon="comments-question" %}
**Need help?** Open the **Support** menu in the top-right corner of any app page and choose [Live Chat](https://tawk.to/chat/6a328f3217693e1d43ea90f9/1jranuncv) or **Email support**.
{% endhint %}


---

# 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, and the optional `goal` query parameter:

```
GET https://wilcode-net.gitbook.io/wilcode-apps/amazon-importer-app/faq/how-price-and-stock-auto-sync-works.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.