> **Description:** Detailed explanations and visual flow diagrams illustrating how MobilePay Online integrates with PSP systems, including payment initiation, processing, and completion flows.

# How MobilePay Online works

**End of life**

This API doesn't have any set end of life yet, but is receiving critical maintenance only. Long term support for PSPs will be served by the [ePayment API](https://developer.vippsmobilepay.com/docs/APIs/psp-epayment-api/README.md). No new integrations to this API will be approved.

How payments in web shops or merchant websites work with MobilePay Online.

## Details

### 1. Customer picks MobilePay at checkout

Make MobilePay available as a payment option in your webshop or app--easy and familiar for your customers!

Screenshot: Mobile merchant cart page showing a product and a "Pay with MobilePay" button as payment option.

### 2. Customer enters phone number and logs in

When they tap MobilePay, initiate a payment by calling
[`POST:/api/v3/payments/`](https://developer.vippsmobilepay.com/redocusaurus/psp-mp-swagger-id.yaml).

* **Mobile device**: The MobilePay app opens automatically.
* **Desktop**: The [landing page](https://developer.vippsmobilepay.com/docs/knowledge-base/landing-page.md) opens.
  The customer enters their phone number and hits *Next* to send the payment request to their app.
  A push notification appears on the customer's phone and the customer opens the MobilePay app.

Screenshot: MobilePay landing page. Left panel: phone number entry for a payment with "Remember my number" checkbox. Right panel: waiting screen with "Open MobilePay" and a countdown timer.

### 3. Customer approves the payment in the app

The customer confirms the payment, and
MobilePay Online reserves the payment and provides a confirmation.

Screenshot: Vipps/MobilePay app payment screen showing the amount to pay to the merchant, with a Visa Spendings card and a Pay button.

### 4. Confirm the order

Once the payment is approved:

* **Mobile device**: The store page/app reopens, confirming a successful order.
* **Desktop**: The customer returns to the webshop, where the order confirmation is displayed.

Screenshot: Merchant webshop order confirmation page showing "Thank you for your order" with a green checkmark. A confirmation email has been sent to the customer.

To check if the payment was authorized, poll using
[`GET:/psp/v3/psppayments/{pspTransactionId}/details`](https://developer.vippsmobilepay.com/redocusaurus/psp-swagger-id.yaml).
See our [polling guidelines](https://developer.vippsmobilepay.com/docs/knowledge-base/polling-guidelines.md) for best practices.

### 5. Complete the order

The merchant completes and ships the order to the customer.

### 6. Capture the payment

Finish by capturing the payment through MobilePay Online.

## Want more details?

For technical details, see the [MobilePay Online guide](https://developer.vippsmobilepay.com/docs/APIs/psp-mp-api/mp-psp-api-guide.md).

> **Full site overview:** For every page in this documentation, read [https://developer.vippsmobilepay.com/llms.txt](https://developer.vippsmobilepay.com/llms.txt).