# Classifiers and Parameters Management
source: https://developer.mastercard.com/mastercard-processing-core/documentation/sandbox-testing/classifiers-and-parameters-management/index.md

The following test cases are provided in this section.

|                                                                                       Test case                                                                                       |               Test case scenario               |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------|
| [Set Classifier](https://developer.mastercard.com/mastercard-processing-core/documentation/sandbox-testing/classifiers-and-parameters-management/set-classifier/index.md)             | Success -- Set Classifier for a Client         |
|                                                                                                                                                                                       | Success -- Set Classifier for a Contract       |
|                                                                                                                                                                                       | Fail -- Invalid Contract's classifier code     |
|                                                                                                                                                                                       | Fail -- Invalid Contract's classifier value    |
| [Retrieve Classifiers](https://developer.mastercard.com/mastercard-processing-core/documentation/sandbox-testing/classifiers-and-parameters-management/retrieve-classifiers/index.md) | Success -- Retrieve Classifiers for a Client   |
|                                                                                                                                                                                       | Success -- No Classifiers for a Client         |
|                                                                                                                                                                                       | Success -- Retrieve Classifiers for a Contract |
|                                                                                                                                                                                       | Success -- No Classifiers for a Contract       |
| [Set Parameter](https://developer.mastercard.com/mastercard-processing-core/documentation/sandbox-testing/classifiers-and-parameters-management/set-parameter/index.md)               | Success                                        |
| [Retrieve Parameters](https://developer.mastercard.com/mastercard-processing-core/documentation/sandbox-testing/classifiers-and-parameters-management/retrieve-parameters/index.md)   | Success                                        |
|                                                                                                                                                                                       | Success -- No parameter codes                  |