Free tool

OpenAPI Validator

Structural checks on a JSON OpenAPI spec - missing responses, missing info fields, and $ref pointers to schemas that don't exist.

Paste your OpenAPI spec (JSON)

2 structural issues found2 paths, 2 operations

"info.version" is missing.
GET /users/{id} has no "responses" defined - most codegen tools will fail or emit "unknown" here.

Structural checks - version, info, responses, and $ref targets. Not a full JSON Schema validation against the OpenAPI spec.

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