Fix API response schema mismatch
When the response shape changes, clients break. Contract tests and JSON Schema validation catch drift before production. Use a schema that matches your OpenAPI or hand-written JSON Schema.
Common causes
- Optional fields became required.
- Types changed (string vs number).
- Renamed keys without versioning.
How to fix
- Paste schema and sample response into Response Schema Validator.
- Regenerate OpenAPI and validate in OpenAPI Validator.
- Version APIs or use additive-only changes.
Use our tool
Validate response schemaRelated