How to Find Which API Integration Changed a Field Format

When a date, identifier, or amount changes format between systems, the transformation may happen at the sender, middleware, or receiving application.

What to check

Trace one test record with a correlation ID through each request and response. Compare schemas, locale and timezone settings, serialization rules, and version changes at each boundary.

Recommended next step

Agree on a canonical format and add contract checks before deployment. Informatix Systems can trace integrations and improve API data consistency.