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

This section provides a history of updates implemented in the Mastercard Processing Debit 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:

| **Open API Spec Version** | **Release Date**  |                                                                                                                                                                                                          **Description**                                                                                                                                                                                                           |
|---------------------------|-------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| v1.1.0                    | 12 September 2025 | • Introduced a new [MTF environment](https://developer.mastercard.com/mastercard-processing-debit/documentation/api-basics-section/environments/index.md) to conduct full User Acceptance Tests (UATs) • Added HTTP status response codes to the [Mastercard Processing Debit error codes](https://developer.mastercard.com/mastercard-processing-debit/documentation/code-and-formats/index.md#mastercard-processing-error-codes) |
| v1.0.0                    | 21 May 2024       | Initial release of the Mastercard Processing Debit API on Mastercard Developers [oas_debit_v1.0.0.yaml](https://static.developer.mastercard.com/content/mastercard-processing-debit/uploads/oas_debit_v1.0.0.yaml) (10KB)                                                                                                                                                                                                          |

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