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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 3:06 PM EDT · Resolved May 11, 2026 3:17 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 2:53 PM EDT · Resolved May 11, 2026 3:01 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 developers' ability to test transaction processing functionality through the sandbox system. The service was restored after 8 minutes of downtime.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 2:37 PM EDT · Resolved May 11, 2026 2:49 PM EDT · Duration 12 minutes

The Mastercard API experienced a major service issue affecting the Transaction API for Acquirers in the sandbox environment. The incident impacted sandbox functionality for transaction processing services used by acquirers. The service was restored after 12 minutes.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 2:21 PM EDT · Resolved May 11, 2026 2:33 PM EDT · Duration 12 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 12 minutes.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 2:05 PM EDT · Resolved May 11, 2026 2:09 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 1:49 PM EDT · Resolved May 11, 2026 1:57 PM EDT · Duration 8 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 8 minutes of downtime.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 1:25 PM EDT · Resolved May 11, 2026 1:45 PM EDT · Duration 20 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 20 minutes of downtime.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 1:17 PM EDT · Resolved May 11, 2026 1:21 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 1:01 PM EDT · Resolved May 11, 2026 1:09 PM EDT · Duration 8 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 8 minutes of downtime.

Major May 11, 2026

May 2026: Sandbox - Service issue detected

Detected May 11, 2026 12:45 PM EDT · Resolved May 11, 2026 12:57 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.