# Support
source: https://developer.mastercard.com/mastercard-processing-authentication/documentation/support/index.md

## FAQ {#faq}

Mastercard Processing brings integrated, end-to-end debit, credit, prepaid, commercial, and virtual card processing solutions, enabling you to meet consumers' evolving needs across the entire payment life cycle with efficiency, scalability, and speed to market. Partnering with us means you can bring the latest innovation to your customers in a safe, efficient, and cost-effective manner. In addition, you have access to Mastercard's other innovative, value-added services, unlike independent service providers. Mastercard Processing provides a global solution that includes Europe and the Middle East and Africa (MEA) regions. New countries are being added due to issuer demand and regulatory, legal, and Scheme compliance scans. Mastercard Processing Authentication Hub APIs enable easy integration with the ACS provider cooperating with Mastercard Processing, supporting PAN-less issuers in authenticating 3D-Secure transactions using the issuer's authentication methods, such as banking websites or mobile. You can try the APIs using the API Explorer offered by the Mastercard Developers portal or self-onboard in the Sandbox environment. To test the API in the Sandbox environment, you create a project in the Developers portal, generate Sandbox keys, and use our test data. The Sandbox environment returns the responses using dummy data, and the response format is the same as the response in the MTF and Production environments. However, with Sandbox, you would not be able to test the full authentication flow, only inbound calls can be tested.

Sandbox is a good environment to ensure you can correctly authenticate with the gateway using a shared client certificate, encrypt sensitive data in the requests and decrypt data from the responses, comply with the API specification, and experience the API functionality.
Sign-up requires you to sign a letter of intent and complete the implementation project scoping to agree on specific requirements to be prepared in the MTF and Production environments. Mastercard Processing takes utmost care while handling sensitive data. The Authentication Hub API uses JSON Web Encryption (JWE) for end-to-end payload encryption for all inbound API calls and mutual TLS (mTLS) for outbound calls. Yes. Mastercard Processing (MP) supports both full-PAN issuers and issuers de-scoped from the PCI DSS regulation (PAN-less issuers). For PAN-less issuers, the PAN is masked and unique technical identifiers (generated by the Mastercard Processing Card Management System) are used in the Authentication Hub API calls. Mastercard Processing Authentication Hub API follows ISO 3166 for country codes and ISO 4217 for currency codes, which are updated as needed. [Contact](mailto:m.p.commercial@mastercard.com) your Mastercard representative for pricing details. Mastercard Processing has designed a seamless implementation process built on best practices. Mastercard Processing Customer Delivery teams manage the end-to-end implementation through a structured project management methodology, ensuring the project is delivered according to the agreed specifications and time following an integrated project plan, including scheme and processing elements. A Project Manager will be assigned to the project upon initiation. They will drive all necessary project management tasks and coordinate efforts with the Mastercard Processing ACS vendor to ensure the timely delivery of the products. If you do not have a Mastercard representative, [send a request for further help](mailto:m.p.commercial@mastercard.com).

## Get Help {#get-help}

### Contact us for technical support. {#contact-us-for-technical-support}