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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 1759 Mastercard API outages since October 2025. The 1759 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Major April 30, 2026

April 2026: Sandbox - Service issue detected

Detected Apr 30, 2026 12:41 PM EDT · Resolved Apr 30, 2026 12:44 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 April 30, 2026

April 2026: Sandbox - Service issue detected

Detected Apr 30, 2026 12:24 PM EDT · Resolved Apr 30, 2026 12:28 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 April 30, 2026

April 2026: Sandbox - Service issue detected

Detected Apr 30, 2026 8:16 AM EDT · Resolved Apr 30, 2026 12:08 PM EDT · Duration about 4 hours

The Mastercard API sandbox environment experienced a major service issue affecting the Transaction API for Acquirers. The incident lasted 3.9 hours before being resolved. The sandbox testing environment was impacted, preventing proper functionality of transaction processing APIs for acquirer clients.

Major April 30, 2026

April 2026: Sandbox - Service issue detected

Detected Apr 30, 2026 5:21 AM EDT · Resolved Apr 30, 2026 5:37 AM EDT · Duration 16 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 16 minutes of downtime.

Major April 30, 2026

April 2026: Sandbox - Service issue detected

Detected Apr 30, 2026 5:13 AM EDT · Resolved Apr 30, 2026 5:17 AM 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 April 30, 2026

April 2026: Sandbox - Service issue detected

Detected Apr 30, 2026 5:05 AM EDT · Resolved Apr 30, 2026 5:09 AM 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 April 30, 2026

April 2026: Sandbox - Service issue detected

Detected Apr 30, 2026 4:49 AM EDT · Resolved Apr 30, 2026 4:53 AM 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 developers' ability to test transaction processing functionality through the sandbox system. The service was restored after 4 minutes of downtime.

Major April 30, 2026

April 2026: Sandbox - Service issue detected

Detected Apr 30, 2026 4:33 AM EDT · Resolved Apr 30, 2026 4:41 AM 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.

Major April 30, 2026

April 2026: Sandbox - Service issue detected

Detected Apr 30, 2026 4:22 AM EDT · Resolved Apr 30, 2026 4:26 AM 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 April 30, 2026

April 2026: Sandbox - Service issue detected

Detected Apr 30, 2026 4:10 AM EDT · Resolved Apr 30, 2026 4:18 AM 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.