# Release History
source: https://developer.mastercard.com/mastercard-processing-core/documentation/release-history/index.md

This section provides a history of updates implemented in the Mastercard Processing Core API. To stay informed on the latest updates, make sure to visit this page regularly.

The following are the updates, listed in reverse chronological order:

| **OpenAPI Specification Version** | **Release Date**  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           **Description**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------|-------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| v.1.1.2                           | 22 January 2026   | • Introduced stricter validation for date filters in the `getTransactions` and `getContractTransactionDocuments` APIs **New Validation Rules:** o `date_from` cannot be older than 24 months from the current system date o The difference between `date_from` and `date_to` cannot exceed 3 months • Improved the [OpenAPI specification](https://developer.mastercard.com/mastercard-processing-core/documentation/api-reference/index.md) by providing missing card contract `classifierCode` `TKN_PAN_AC` and new `transactionTypeCode` (`TP1`, `TP2`, `TP3`, and `TP4`) and the corresponding fees (`TPF1`, `TPF2`, `TPF3`, and `TPF4`) in the Standard Product                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| v1.1.1                            | 24 October 2025   | • Added a use case [Set a PIN for a Full PAN Issuer (asymmetric PIN block encryption)](https://developer.mastercard.com/mastercard-processing-core/documentation/use-cases/pin-management/set-pin-full-pan-issuer/index.md#set-a-pin-for-a-full-pan-issuer-asymmetric-pin-block-encryption) and important notes • Added important notes and tips applicable to all three "Set a PIN" use cases [oas_core_v1.1.1.yaml](https://static.developer.mastercard.com/content/mastercard-processing-core/uploads/oas_core_v1.1.1.yaml) (489KB)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| v1.1.0                            | 12 September 2025 | • Introduced a new [MTF environment](https://developer.mastercard.com/mastercard-processing-core/documentation/api-basics-section/environments/index.md) to conduct full User Acceptance Tests (UATs) • Added HTTP status response code to the [Mastercard Processing Core error codes](https://developer.mastercard.com/mastercard-processing-core/documentation/code-and-formats/index.md#mastercard-processing-error-codes) along with new errors: `ADDRESS_TYPE_ALREADY_CREATED` `INVALID_AUTHENTICATION_METHOD_FOR_GIVEN_TYPE` `INVALID_CLASSIFIER_CODE` `INVALID_INSTITUTION_CONFIGURATION` `INVALID_PARAMETER_VALUE` `INVALID_SEQUENCE_NUMBER` `MAX_NUMBER_OF_RECORDS_EXCEEDED` `PIN_CHANGE_DISABLED` `PIN_NOT_FOUND` `TARIFF_CODE_DOES_NOT_EXIST` `TOO_MANY_CLIENTS_FOUND` `TOO_MANY_CONTRACTS_FOUND` • Added the `amendmentDate` field to the response of `getContractTransactionDocuments` and `getTransactionDocuments` operations • Improved the [OpenAPI specification](https://developer.mastercard.com/mastercard-processing-core/documentation/api-reference/index.md#apis) by providing clearer descriptions for the possible values of `balanceCode`, `classifierCode/classifierValue`, `parameterCode/parameterValue`, and `transactionTypeCode` in the Standard Product [oas_core_v1.1.0.yaml](https://static.developer.mastercard.com/content/mastercard-processing-core/uploads/oas_core_v1.1.0.yaml) (488KB) |
| v1.0.0                            | 14 November 2023  | Initial release of the Mastercard Processing Core API on Mastercard Developers [oas_core_v1.0.0.yaml](https://static.developer.mastercard.com/content/mastercard-processing-core/uploads/oas_core_v1.0.0.yaml) (479KB)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |

Refer to the [Use Cases](https://developer.mastercard.com/mastercard-processing-core/documentation/use-cases/index.md) section for functional explanation and the [API Reference](https://developer.mastercard.com/mastercard-processing-core/documentation/api-reference/index.md) section for technical details.