Is JSON Schema part of OpenAPI?

Yes. OpenAPI uses JSON Schema to describe request and response payload structures.

Can JSON Schema be used without OpenAPI?

Yes. JSON Schema can validate JSON documents independently of API specifications.

OpenAPI is designed primarily for REST APIs, although it can describe HTTP-based services in general.

Not directly. OpenAPI describes the schema, but runtime validation requires libraries or middleware that enforce those schemas.

JSONJSON SchemaOpenAPIAPIMicroservicesValidationREST APIYAML

Jsonkithub Team

March 13, 2026

9 min read

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