Step 2: Set Up the Server-Side Component {#uc-qsg-gs-step2}
===========================================================

To initialize `Unified Checkout` within your webpage, you need to set up the server-side component. This task involves making a server-to-server call to the sessions API to authenticate your merchant credentials and establish how the `Unified Checkout` front-end components will function.  
For detailed information about `Unified Checkout` and the integration process, see the [*`Unified Checkout` Integration Guide*](https://developer.cybersource.com/docs/cybs/en-us/unified-checkout/developer/all/rest/unified-checkout/uc-intro.md "").

1. Implement a server-to-server call to the sessions API.

   #### ADDITIONAL INFORMATION

   This call should include parameters that define how `Unified Checkout` performs.

2. Handle the response from the sessions API.

   #### ADDITIONAL INFORMATION

   The response will contain:

   * A transaction-specific public key for securing the transaction in the customer's browser.
   * An authenticated context description package that manages the payment experience on the client side, including available payment options, interface styling, and payment methods.
3. Store and manage the JSON Web Token (JWT) object, referred to as the *capture context*.

   #### ADDITIONAL INFORMATION

   This JWT contains all the functions compiled from the sessions API response.

REST Example: Set Up the Server-Side Component  
In this example, the targetOrigins and the allowedPaymentTypes fields define the target origin and the accepted digital payment methods in your capture context.

```
{
  "clientReferenceInformation": {
    "code": "TAGX001"
  },
  "targetOrigins": [
    "https://www.test.com"
  ],
  "clientVersion": "0.26",
  "allowedCardNetworks": [
    "VISA",
    "MASTERCARD",
    "AMEX"
  ],
  "allowedPaymentTypes": [
    "PANENTRY",
    "CLICKTOPAY",
    "GOOGLEPAY"
  ],
  "country": "US",
  "locale": "en_US",
  "captureMandate": {
    "billingType": "FULL",
    "requestEmail": true,
    "requestPhone": true,
    "requestShipping": true,
    "shipToCountries": [
      "US",
      "GB"
    ],
    "showAcceptedNetworkIcons": true
  },
  "orderInformation": {
    "amountDetails": {
      "totalAmount": "1.01",
      "currency": "USD"
    }
  },
  "completeMandate": {
    "type": "CAPTURE",
    "decisionManager": true
  }
}
```

#### AFTER COMPLETING THE TASK

Proceed to [Step 3: Set Up the Client-Side Component](/docs/cybs/en-us/unified-checkout/quick-start/all/na/uc-qsg/uc-qsg-gs-intro/uc-qsg-gs-step3.md "").