> For the complete documentation index, see [llms.txt](https://developer.esw.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.esw.com/callback-api/callback-api/overview.md).

# Overview

Use the ESW Light Touch Integration Callback API to connect your storefront to ESW with fewer custom steps. It streamlines common flows such as pre-order, checkout, and order confirmation. This reduces integration effort and speeds up go-live.

<table data-view="cards"><thead><tr><th>Feature</th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden>Description</th><th data-hidden data-card-cover-dark data-type="image">Cover image (dark)</th></tr></thead><tbody><tr><td>Country Selector</td><td data-object-fit="cover"><a href="/files/BMmGE9FVwEzh8Ng190dz">/files/BMmGE9FVwEzh8Ng190dz</a></td><td>Lets shoppers choose their market and shopping context.</td><td data-object-fit="cover"><a href="/files/KBOJ9enfyz5rExOBBFKW">/files/KBOJ9enfyz5rExOBBFKW</a></td></tr><tr><td>Dynamic Pricing</td><td><a href="/files/GUHt2vmduc5hbhle75SD">/files/GUHt2vmduc5hbhle75SD</a></td><td>Shows localized pricing based on shopper context.</td><td><a href="/files/oTjPCSCqsXauHkLBvxnJ">/files/oTjPCSCqsXauHkLBvxnJ</a></td></tr><tr><td>Fixed Pricing</td><td><a href="/files/jYdZ5WfsaK6OGmeQr2dn">/files/jYdZ5WfsaK6OGmeQr2dn</a></td><td>Supports fixed price display where that model is required.</td><td><a href="/files/jP1qZwAkJ1yGV2N28whN">/files/jP1qZwAkJ1yGV2N28whN</a></td></tr><tr><td>Checkout</td><td><a href="/files/rVo90YmJY4k8sGQAN6u4">/files/rVo90YmJY4k8sGQAN6u4</a></td><td>Supports shopper data handoff and stored cards in checkout.</td><td><a href="/files/XHXxKUGlsBI9gZ8AV4pT">/files/XHXxKUGlsBI9gZ8AV4pT</a></td></tr><tr><td>Returns integration</td><td><a href="/files/tLkFxnugpy4qwrERsigC">/files/tLkFxnugpy4qwrERsigC</a></td><td>Connects post-purchase returns flows with ESW services.</td><td><a href="/files/WQNwLaWiwBRIKOzbcguL">/files/WQNwLaWiwBRIKOzbcguL</a></td></tr><tr><td>Order status synchronization</td><td><a href="/files/0NrC4UI5b63X3YuAxFiK">/files/0NrC4UI5b63X3YuAxFiK</a></td><td>Keeps order updates aligned across connected systems.</td><td><a href="/files/rciYDVMdxjM7zSha9Lh6">/files/rciYDVMdxjM7zSha9Lh6</a></td></tr></tbody></table>

{% tabs %}
{% tab title="Key concepts" %}

* **Script:** Code that adds behavior to a web page or application.
* **Storefront:** The retailer’s site where shoppers browse and buy products.
* **Pre-Order (Checkout Call):** The request sent to ESW when a shopper starts checkout. It includes cart, shopper, and configuration data.
* **Order Confirmation:** The payload sent after a successful payment to confirm the order in downstream systems.
  {% endtab %}

{% tab title="What shoppers get" %}

### What shoppers get

After setup, shoppers can see localized pricing, use ESW checkout, and complete orders with a smoother experience.

They can also use saved payment methods where supported and benefit from synced order and returns flows.
{% endtab %}
{% endtabs %}

### Setup overview

Complete these steps in order:

{% stepper %}
{% step %}

### Store the cart identifier in cookies

Set a cookie that stores the cart reference used by ESW callbacks.

See [Storing A Cart Identifier In Cookies](/callback-api/callback-api/storing-a-cart-identifier-in-cookies.md).
{% endstep %}

{% step %}

### Enable fixed pricing support

Enable fixed pricing only if your integration requires it.

See [Enabling Fixed Pricing In Callback API](/callback-api/callback-api/enabling-fixed-pricing-in-callback-api.md).
{% endstep %}

{% step %}

### Implement the Callback API endpoints

Create the endpoints ESW uses to retrieve carts, confirm orders, and sync updates.

See [Implementing Callback API Endpoints](/callback-api/callback-api/implementing-callback-api-endpoints.md).
{% endstep %}

{% step %}

### Share the Callback API credentials with ESW

Provide the authentication details ESW needs for secure access to your endpoints.

See [Providing Callback API Endpoint Credentials To ESW](/callback-api/callback-api/providing-callback-api-endpoint-credentials-to-esw.md).
{% endstep %}

{% step %}

### Add the ESW JavaScript URL to your page headers

Add the onboarding script so your storefront can load ESW client behavior.

See [Adding JavaScript To Page Headers](/callback-api/callback-api/adding-javascript-to-page-headers.md).
{% endstep %}
{% endstepper %}

{% hint style="info" %}
For additional terms, refer to [glossary](/getting-started/get-started-with-esw/glossary.md).
{% endhint %}


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