OpenAPI Validator API
Validate and summarise an OpenAPI / Swagger API definition. Supply the spec inline (?spec=), as a request body, or fetched from a URL (?url=, SSRF-guarded) — in JSON or YAML. The validator detects the version (Swagger 2.0, OpenAPI 3.0.x or 3.1.x), checks the required structure (info.title and info.version, the presence of paths/components, and every operation's responses), and lints for common problems — duplicate or missing operationIds, operations without a summary or description, tags used but not declared, and malformed paths — returning a valid flag, counts of paths, operations, schemas, tags and servers, and separate error and warning lists. A summary endpoint inventories the whole API: every endpoint with its method, path, operationId, summary and tags, plus the declared servers, tags and component schemas. Built for CI gates on API contracts, API-catalogue ingestion, documentation pipelines and design review. An OpenAPI definition validator and linter — distinct from the JSON-Schema validator (jsonschema), the JSON/YAML/XML converters and the on-page HTML/SEO tools. No upstream key, no cache.
api.oanor.com/openapi-api
