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Mastercard API Outage History

Every past Mastercard API outage tracked by IsDown, with detection times, duration, and resolution details.

There were 1761 Mastercard API outages since October 2025. The 1761 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 6:34 PM EDT · Resolved May 11, 2026 6:46 PM EDT · Duration 12 minutes

The Mastercard Account Validation service experienced a major service issue in the sandbox environment that lasted 12 minutes. The incident affected the sandbox testing environment for the Mastercard Account Validation API component. The service has been restored to normal operation.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 6:02 PM EDT · Resolved May 11, 2026 6:26 PM EDT · Duration 24 minutes

The Mastercard API experienced a major service issue affecting the Transaction API for Acquirers in the sandbox environment. The incident impacted developers' ability to test transaction processing functionality through the sandbox system. The service was restored after 24 minutes of downtime.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 5:42 PM EDT · Resolved May 11, 2026 5:58 PM EDT · Duration 16 minutes

The Mastercard API Sandbox experienced a major service issue affecting the Transaction API for Acquirers. The incident impacted the sandbox environment used for testing and development purposes. The service was restored after 16 minutes of downtime.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 5:02 PM EDT · Resolved May 11, 2026 5:14 PM EDT · Duration 12 minutes

The Mastercard API Sandbox experienced a major service issue affecting the Transaction API for Acquirers. The incident impacted sandbox environment functionality for acquirer transaction processing. The service was restored after 12 minutes of downtime.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 4:54 PM EDT · Resolved May 11, 2026 4:58 PM EDT · Duration 4 minutes

The Mastercard API Sandbox experienced a major service issue affecting the Transaction API for Acquirers. The incident impacted the sandbox environment used for testing and development purposes. The service was restored after 4 minutes of downtime.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 4:42 PM EDT · Resolved May 11, 2026 4:46 PM EDT · Duration 4 minutes

The Mastercard API Sandbox experienced a major service issue affecting the Transaction API for Acquirers. The incident impacted sandbox environment functionality for acquirer transaction processing. The service was restored after 4 minutes.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 4:17 PM EDT · Resolved May 11, 2026 4:30 PM EDT · Duration 12 minutes

The Mastercard API sandbox environment experienced a major service issue affecting the Mastercard Account Validation and Transaction API for Acquirers components. The incident lasted 12 minutes before being resolved. Both API services were unavailable during this period, impacting developers and integrators using the sandbox environment for testing.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 3:41 PM EDT · Resolved May 11, 2026 3:54 PM EDT · Duration 12 minutes

The Mastercard API Sandbox experienced a major service issue affecting the Transaction API for Acquirers. The incident impacted the sandbox environment used for testing and development purposes. The service was restored after 12 minutes of downtime.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 3:29 PM EDT · Resolved May 11, 2026 3:37 PM EDT · Duration 8 minutes

The Mastercard API experienced a major service issue affecting the Transaction API for Acquirers in the sandbox environment. The incident impacted the sandbox testing environment and the Transaction API functionality used by acquirers. The service was restored after 8 minutes.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 3:21 PM EDT · Resolved May 11, 2026 3:25 PM EDT · Duration 4 minutes

The Mastercard API experienced a major service issue affecting the Transaction API for Acquirers in the sandbox environment. The incident impacted the sandbox testing environment and the Transaction API functionality used by acquirers. The service was restored after 4 minutes.