API Status Codes
400 Bad Request
Events failed validation on /import.
401 Unauthorized
Mixpanel could not authenticate the request.
403 Forbidden
The request was understood but not permitted.
413 Payload Too Large
The request body exceeded the size limit.
429 Too Many Requests
The project exceeded the ingestion rate limit.
Data Problems
Duplicate events
The same event appears more than once in reports.
Historical events missing
A backfill returned success but the events never arrived.
Identity
Events with no user
What to send as distinct_id when nobody is logged in.
Duplicate user profiles
One person appears as several Mixpanel users.
Warehouse Connectors
Snowflake: JWT token is invalid
Snowflake error 390144 during connector authentication.