Problem Statement
Why is strict schema validation important for APIs?
Explanation
Strong validation is a cheap shield. If you only accept known fields with the right types and ranges, many attacks never reach business logic. This also simplifies logging and analytics because inputs are predictable.
Use the same schemas for docs, tests, and enforcement so drift does not creep in.
Code Solution
SolutionRead Only
POST /users { email: string, name: string } // extra fields rejected
// Implement with JSON Schema or framework validators