| Time | Status | User Agent |  |
| :-- | :-- | :-- | :-- |
| Make a request to see history. |

#### URL Expired

The URL for this request expired after 30 days.

### checkoutSessionId

string

required

### paymentInitiatorId

uuid

required

The ID of the payment initiator

### amount

integer

required

The payment amount in the smallest currency unit (e.g., pence for GBP)

### currency

const

enum

required

The currency code

- **GBP**

Allowed:

`GBP`

### successUrl

uri

required

URL to redirect the user after successful payment

### failureUrl

uri

required

URL to redirect the user after failed payment

### cancelUrl

uri

required

URL to redirect the user after cancelled payment

### externalReference

string | null

External reference for the payment

### metadata

object

Custom metadata for the payment (max 10 key-value pairs, keys 1-30 chars, values 1-200 chars)

### shippingAddress

object

Address with all fields optional

### billingAddress

object

Address with all fields optional

### lineItems

array of objects | null

Array of line items, each being either airline, car rental, lodging, or product data

**accept**

string

enum

Defaults to application/json

Generated from available response content types

- `application/json`
- `application/problem+json`

### Responses

- `200` Payment processed successfully
- `400` Bad Request
- `401` Unauthorized
- `402` Payment Required
- `403` Forbidden
- `404` Not Found
- `409` Conflict
- `500` Internal Server Error

---

### Example

```bash
curl --request POST \
     --url https://api.superpayments.com/2026-04-01/checkout-sessions/checkoutSessionId/proceed \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '{
  "shippingAddress": {
    "addressLine1": null,
    "addressLine2": null,
    "addressLine3": null,
    "city": null,
    "country": null,
    "postCode": null,
    "firstName": null,
    "lastName": null,
    "phone": null,
    "email": null
  },
  "billingAddress": {
    "addressLine1": null,
    "addressLine2": null,
    "addressLine3": null,
    "city": null,
    "country": null,
    "postCode": null,
    "firstName": null,
    "lastName": null,
    "phone": null,
    "email": null
  }
}'
```