Create Session

Request to create a payment session. A payment session can be used to temporarily store any of the request fields of operations that allow a session identifier as a request field.

The request fields stored in the session may then be used in these operations by providing the session identifier. They may be updated and obtained using the Update Session and Retrieve Session operation respectively.

POST https://test-nbkpayment.mtf.gateway.mastercard.com/api/nvp/version/19

Authentication Copied to clipboard

This operation requires authentication via one of the following methods:


  • Certificate authentication.
  • To authenticate to the API two additional NVP parameters must be supplied in the request. Provide 'merchant.<your gateway merchant ID>' in the apiUsername field and your API password in the apiPassword field.

Request Copied to clipboard

Fields Copied to clipboard

apiOperation Copied to clipboard String = CREATE_SESSION FIXED

Any sequence of zero or more unicode characters.

correlationId Copied to clipboard String OPTIONAL

A transient identifier for the request, that can be used to match the response to the request.

The value provided is not validated, does not persist in the gateway, and is returned as provided in the response to the request.

Data can consist of any characters

Min length: 1 Max length: 100
merchant Copied to clipboard Alphanumeric + additional characters REQUIRED

The unique identifier issued to you by your payment provider.

This identifier can be up to 12 characters in length.

Data may consist of the characters 0-9, a-z, A-Z, '-', '_'

Min length: 1 Max length: 40

Response Copied to clipboard

Fields Copied to clipboard

correlationId Copied to clipboard String CONDITIONAL

A transient identifier for the request, that can be used to match the response to the request.

The value provided is not validated, does not persist in the gateway, and is returned as provided in the response to the request.

Data can consist of any characters

Min length: 1 Max length: 100
merchant Copied to clipboard Alphanumeric + additional characters ALWAYS PROVIDED

The unique identifier issued to you by your payment provider.

This identifier can be up to 12 characters in length.

Data may consist of the characters 0-9, a-z, A-Z, '-', '_'

Min length: 1 Max length: 40
result Copied to clipboard Enumeration ALWAYS PROVIDED

A system-generated high level overall result of the transaction/operation.

Value must be a member of the following list. The values are case sensitive.

FAILURE

The operation was declined or rejected by the gateway, acquirer or issuer

PENDING

The operation is currently in progress or pending processing

SUCCESS

The operation was successfully processed

UNKNOWN

The result of the operation is unknown

session.id Copied to clipboard ASCII Text ALWAYS PROVIDED

The identifier for the payment session.

You can add request fields to the session using a Hosted Payment Form or wallet provider interaction, or the Update Session operation.

Data consists of ASCII characters

Min length: 31 Max length: 35

Errors Copied to clipboard

error Copied to clipboard

Information on possible error conditions that may occur while processing an operation using the API.

error.cause Copied to clipboard Enumeration

Broadly categorizes the cause of the error.

For example, errors may occur due to invalid requests or internal system failures.

Value must be a member of the following list. The values are case sensitive.

CONSTRAINT_VIOLATION

The request was rejected due to the request parameters violating the constraints.

INVALID_REQUEST

The request was rejected because it did not conform to the API protocol.

REQUEST_REJECTED

The request was rejected due to security reasons such as firewall rules, expired certificate, etc.

SERVER_BUSY

The server did not have enough resources to process the request at the moment.

SERVER_FAILED

There was an internal system failure.

error.explanation Copied to clipboard String

Textual description of the error based on the cause.

This field is returned only if the cause is INVALID_REQUEST, SERVER_BUSY or CONSTRAINT_VIOLATION.

Data can consist of any characters

Min length: 1 Max length: 1000
error.field Copied to clipboard String

Indicates the name of the field that failed validation or has violated the payment constraints.

This field is returned only if the cause is INVALID_REQUEST and a field level validation error was encountered; or if the cause is CONSTRAINT_VIOLATION and a field level constraint was violated.

Data can consist of any characters

Min length: 1 Max length: 100
error.supportCode Copied to clipboard String

Indicates the code that helps the support team to quickly identify the exact cause of the error.

This field is returned only if the cause is SERVER_FAILED or REQUEST_REJECTED.

Data can consist of any characters

Min length: 1 Max length: 100
error.validationType Copied to clipboard Enumeration

Indicates the type of field validation error.

This field is returned only if the cause is INVALID_REQUEST and a field level validation error was encountered.

Value must be a member of the following list. The values are case sensitive.

INVALID

The request contained a field with a value that did not pass validation.

MISSING

The request was missing a mandatory field.

UNSUPPORTED

The request contained a field that is unsupported.

result Copied to clipboard Enumeration

A system-generated high level overall result of the operation.

Value must be a member of the following list. The values are case sensitive.

ERROR

The operation resulted in an error and hence cannot be processed.