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Knowledge Base & Operational DocumentationHow to Handle API Responses That Contain a Field the Client Does Not Recognize
11/10/2026
An API provider may add fields without breaking its contract, but strict clients can reject the entire response. Ignoring schema changes altogether can also hide important behavior.
What to check
Review the response version, client validation mode, required and optional fields, and provider compatibility policy. Compare known-good payloads.
Recommended next step
Handle unknown optional fields safely while validating required data and monitoring contract changes. Informatix Systems can improve API integration resilience.