On January 8th, from approximately 3:14 pm UTC to 6:00 pm UTC, a temporary service disruption caused degraded performance for our Ingestion APIs. During this period, Mixpanel was unable to accept certain data sent through the Ingestion API endpoints, including event data (via /track and /import), user profile data (via /engage), and group profile data (via /groups).

This disruption resulted from an outage with one of our upstream service providers. Following their recovery, our Ingestion APIs resumed normal functionality. The disruption primarily affected projects hosted in our US data center. Projects hosted in EU and India through our Data Residency Programs were unaffected.

Potential Action Required

Data sent during this period of time that resulted in an error was not stored on our end and may require resubmission.

• If you have already implemented the recommended retry behavior, your requests were likely ingested once the services were restored and no additional action is necessary.
• If you have not implemented the recommended retry behavior, you will need to resend data for the affected period. The data you are resending includes any events already seen in Mixpanel, so please ensure those events maintain the same $insert_id, time, distinct_id, and event name so that Mixpanel properly deduplicates the data. If you have not already implemented automatic retry behavior for your ingestion pipeline we would highly recommend doing so.

We are committed to delivering accurate, timely analysis to support your critical decision-making, and we prioritize fast, high-quality customer support. If you have any questions or concerns, please feel free to reach out.