Hi Team,
I am encountering an issue where VAPI AI is hallucinating snake_case keys (e.g., offboarding_type, first_name) in the function call, even though our API expects PascalCase (e.g., OffboardingType, FirstName). This mismatch is causing 400 Bad Request errors.
You can refer to Call ID "726f0efd-00f8-40dc-9889-e6682a01dc0f" where this issue actually occurred. Please look into why the key casing is being altered or misinterpreted despite camelCase being defined in the function schema.
Thanks,
Sahil