Validator API

Assumption: the most common intent is validating API responses against JSON schemas and OpenAPI contracts to ensure consistent behavior across services. The Validator API provides a backend validation engine that compares actual payloads to defined schemas, checks required fields, types, and enum constraints, and reports precise differences. It supports REST and OpenAPI-backed endpoints, enabling engineers to verify contract adherence early in development and during automated testing, reducing downstream integration issues.\n\nCore logic and features are designed for speed and accuracy. Required features include parsing input payloads or example responses, validating against a target schema, producing a structured result with field paths and type checks, and supporting OpenAPI 3.x and JSON Schema Draft-07+. Optional features cover dereferencing $ref, custom format validators, parallel validation across multiple schemas, and exporting results in machine-readable formats for CI pipelines.\n\nInputs & outputs are explicit: inputs include endpoint URL, HTTP method, sample payload or schema, optional headers, and a target schema or OpenAPI document. Outputs provide a pass/fail status, JSON pointers for errors, type and required-field mismatches, and suggested corrections. The tool supports machine-readable JSON outputs for automated checks and human-readable reports for debugging, enabling teams to trace regression to a single endpoint or a contract change.\n\nError handling and edge cases are addressed conservatively. Invalid JSON, missing required fields, or extra fields triggers clear error messages; schema-version mismatches prompt guidance to upgrade; external schemas that fail to load emit retry recommendations. By design, the system avoids leaking implementation details and focuses on actionable diagnostics to speed remediation and improve long-term API stability across environments.