Content-Type Consistency Validator
Validate that Content-Type headers match actual payloads and align with OpenAPI content definitions. Free API header consistency tool by Graph Tools.
Use this free Content-Type consistency validator to check that HTTP Content-Type headers match the actual payload format and align with the media types declared in your OpenAPI spec. Paste a request or response sample alongside the spec definition and get instant feedback on mismatches, missing content definitions, and unsupported media types. Useful for API developers, QA engineers, and integration testers.