Validation

What it is

API validation rejects malformed shape and invalid fields.

When to use it

Validate type, size, allowlists, and required values before business checks.

Syntax

Accept: application/json
// Validation failures conventionally return 422 in Laravel.

Example

{
  "message":"The given data was invalid.",
  "errors":{"amount_cents":["The amount cents must be at least 1."]}
}

Common mistakes

Validation is not authorization; unsupported content type and malformed JSON need separate handling.

Related topics