How do I fix "is not valid against the requested profile" JSON schema errors?

This error indicates JSON does not conform to the JSON Schema validation rules. Common causes: missing required fields defined in schema. Field has wrong data type (string instead of number). Value outside allowed range or enum. Pattern mismatch for regex-validated fields. Array length violates minItems or maxItems. Additional properties present when additionalProperties: false. Nested object missing required fields. String not matching format constraint (email, date, uri). Read error message carefully—it specifies which validation rule failed and at what path. Check schema definition for the failing field's constraints. Verify your JSON structure against schema requirements. Use schema validators providing detailed error messages. Online schema validators show exactly which rules failed. For production APIs, implement schema validation before sending requests. Log validation errors with full details for debugging. Test JSON with our JSON Validator at jsonconsole.com/json-editor to catch errors early. Ensure schema version matches validator (Draft 4, 7, 2019-09, 2020-12). Update JSON to match schema requirements or modify schema if requirements are incorrect. Schema errors are precise—error messages tell you exactly what to fix.