Fat Zebra Outage History

Fat Zebra is up right now

Fat Zebra had 10 outages in the last 2 years totaling 37h 48m of downtime — averaging 0.4 incidents per month.

There were 10 Fat Zebra outages since October 31, 2025 totaling 37h 48m of downtime. Each is summarised below — incident details, duration, and resolution information.

Source: https://status.fatzebra.com

Major September 1, 2026

91 - Host or Switch Unavailable errors affecting CBA merchants

Detected by Pingoru
Sep 01, 2026, 10:18 AM UTC
Resolved
Sep 01, 2026, 10:52 AM UTC
Duration
34m
Affected: Gateway: Commonwealth Bank
Timeline · 3 updates
  1. investigating Sep 01, 2026, 10:18 AM UTC

    We are currently investigating a problem with CBA merchants receiving '91 - Host or Switch Unavailable' responses for all transactions.

  2. monitoring Sep 01, 2026, 10:32 AM UTC

    Transactions for CBA merchants are now processing successfully. We will continue to monitor during the evening for any further problems.

  3. resolved Sep 01, 2026, 10:52 AM UTC

    This incident has been resolved.

Read the full incident report →

Major August 25, 2026

Errors affecting Merchants acquiring via Fiserv (First Data)

Detected by Pingoru
Aug 25, 2026, 09:48 PM UTC
Resolved
Aug 25, 2026, 11:59 PM UTC
Duration
2h 11m
Affected: Gateway: Fiserv XTP
Timeline · 3 updates
  1. investigating Aug 25, 2026, 09:48 PM UTC

    We are currently investigating a problem with merchants acquiring via Fiserv (First Data), receiving '91 - Host or Switch Unavailable' responses for some transactions.

  2. identified Aug 25, 2026, 09:50 PM UTC

    Fiserv has confirmed they are currently investigating a service disruption to Mastercard Transaction Processing on their side.

  3. resolved Aug 25, 2026, 11:59 PM UTC

    Please see a further update from Fiserv below: Fiserv would like to advise clients and partners that the issue impacting Mastercard transaction processing has now been resolved. Mastercard transactions are now processing as expected.

Read the full incident report →

Notice August 15, 2026

Payment failures with Mastercard cards

Detected by Pingoru
Aug 15, 2026, 04:48 AM UTC
Resolved
Aug 15, 2026, 05:59 AM UTC
Duration
1h 11m
Affected: Gateway
Timeline · 2 updates
  1. investigating Aug 15, 2026, 04:48 AM UTC

    We are currently seeing a spike in failures of payments with Mastercard cards, due to an issue with an upstream provider. We are investigating the cause.

  2. resolved Aug 15, 2026, 05:59 AM UTC

    The incident with our third party provider has been resolved.

Read the full incident report →

Notice July 28, 2026

Gateway transactions timing out

Detected by Pingoru
Jul 28, 2026, 04:08 AM UTC
Resolved
Jul 28, 2026, 04:56 AM UTC
Duration
48m
Affected: Gateway
Timeline · 4 updates
  1. investigating Jul 28, 2026, 04:08 AM UTC

    We're currently investigating an outage affecting our Gateway. We are investigating the cause for this.

  2. investigating Jul 28, 2026, 04:27 AM UTC

    We are continuing to investigate this issue.

  3. monitoring Jul 28, 2026, 04:42 AM UTC

    A fix has been implemented and we're monitoring Gateway's health.

  4. resolved Jul 28, 2026, 04:56 AM UTC

    This incident has been resolved.

Read the full incident report →

Notice June 18, 2026

Downstream issues with EFTPOS

Detected by Pingoru
Jun 18, 2026, 01:13 AM UTC
Resolved
Jun 18, 2026, 01:37 AM UTC
Duration
23m
Affected: Gateway
Timeline · 4 updates
  1. investigating Jun 18, 2026, 01:13 AM UTC

    We are currently seeing issues with the EFTPOS switch. These occurred at 5am AEST, and then again from 9am and ongoing through 11am.

  2. investigating Jun 18, 2026, 01:17 AM UTC

    We are continuing to investigate this issue.

  3. monitoring Jun 18, 2026, 01:17 AM UTC

    We're continue to monitor this issue.

  4. resolved Jun 18, 2026, 01:37 AM UTC

    This incident has been resolved.

Read the full incident report →

Notice May 26, 2026

Transaction time outs

Detected by Pingoru
May 26, 2026, 11:31 PM UTC
Resolved
May 26, 2026, 11:57 PM UTC
Duration
26m
Affected: Gateway
Timeline · 4 updates
  1. investigating May 26, 2026, 11:31 PM UTC

    We observed some transaction timeouts between 9:10am and 9:24am. The system has now stablised.

  2. monitoring May 26, 2026, 11:31 PM UTC

    We're monitoring Gateway's health

  3. monitoring May 26, 2026, 11:57 PM UTC

    Gateway has been stable since 9:24am.

  4. resolved May 26, 2026, 11:57 PM UTC

    This incident has been resolved.

Read the full incident report →

Notice April 7, 2026

Issues With 3DS2 Verification

Detected by Pingoru
Apr 07, 2026, 04:31 AM UTC
Resolved
Apr 07, 2026, 07:08 AM UTC
Duration
2h 37m
Timeline · 3 updates
  1. identified Apr 07, 2026, 04:31 AM UTC

    We are seeing a larger number of ‘Authentication not Available on Lookup’ errors for 3DS checks today. The response we are getting from our 3DS provider for these errors is as below: “message”: “A message element required as defined in Table A.1 is missing from the message. browserColorDepth,browserLanguage,browserUserAgent,browserJavaEnabled,browserTZ,browserAcceptHeader,” This response typically indicates an issue with the browser data collection, but there does seem to be a very large spike in these responses since this morning. Our Dev Team and our 3DS provider are investigating the issue as a matter of urgency. We will provide further updates on this matter as soon as we can.

  2. monitoring Apr 07, 2026, 06:07 AM UTC

    As of around 20 minutes ago we are seeing massively decreased error rates, so believe the issue has been resolved. We suspect the issue was at our 3DS provider's end, but are waiting from confirming from their end. In the meantime we will continue to monitor.

  3. resolved Apr 07, 2026, 07:08 AM UTC

    Our 3DS provider has confirmed the issue was at their end and has now been resolved.

Read the full incident report →

Minor February 24, 2026

Checkout Link - High Latency Detected

Detected by Pingoru
Feb 24, 2026, 08:38 PM UTC
Resolved
Feb 24, 2026, 10:36 PM UTC
Duration
1h 57m
Affected: Gateway
Timeline · 3 updates
  1. investigating Feb 24, 2026, 08:38 PM UTC

    We have detected high latency and failure rates on our Checkout link. We are currently investigating the cause.

  2. monitoring Feb 24, 2026, 09:15 PM UTC

    Transactions processed via Checkout are now processing successfully. We will continue to monitor during the afternoon for any further problems.

  3. resolved Feb 24, 2026, 10:36 PM UTC

    This incident has been resolved.

Read the full incident report →

Critical December 10, 2025

91 - Host or Switch Unavailable errors affecting Westpac merchants

Detected by Pingoru
Dec 10, 2025, 02:37 AM UTC
Resolved
Dec 10, 2025, 05:10 AM UTC
Duration
2h 32m
Affected: Gateway: Westpac & Bank of Melbourne
Timeline · 3 updates
  1. investigating Dec 10, 2025, 02:37 AM UTC

    We are currently investigating a problem with Westpac merchants receiving '91 - Host or Switch Unavailable' responses for all transactions.

  2. monitoring Dec 10, 2025, 02:59 AM UTC

    Transactions for Westpac merchants are now processing successfully. We will continue to monitor during the afternoon for any further problems.

  3. resolved Dec 10, 2025, 05:10 AM UTC

    This incident has been resolved.

Read the full incident report →

Major October 31, 2025

91 Errors Affecting AMEX Transactions Processed Via FDI XTP

Detected by Pingoru
Oct 31, 2025, 03:27 AM UTC
Resolved
Nov 01, 2025, 04:32 AM UTC
Duration
1d 1h
Affected: Gateway: AMEX
Timeline · 2 updates
  1. identified Oct 31, 2025, 03:27 AM UTC

    We are currently investigating a problem with AMEX transactions receiving 91 response codes for some transaction attempts processed via FDI XTP. We are awaiting further information from our upstream provider regarding this incident. Please note, this issue is ONLY affect AMEX transactions, all other card types including Visa and Mastercard are NOT affected. Further updates will be provided as soon as they are available.

  2. resolved Nov 01, 2025, 04:32 AM UTC

    This incident has been resolved.

Read the full incident report →