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## API Explorer now returns JSON for v2 REST endpoints

Thanks to user feedback, REST `/v2/` endpoints in the API Explorer now return JSON responses instead of XML, matching the `Accept: application/json` header advertised in the request.

* **Path-level header parameters now inherit correctly** — operations defined under a path in the OpenAPI specs pick up `Accept` and other header parameters declared at the path level, so v2 responses render as JSON in the Explorer.
* **No spec changes required on our side** — the fix landed in the Fern platform; existing v2 specs render correctly without edits.

For an example, try [List Customers (v2)](/developer/api-reference/rest/admin/management/customers/v2/get-customers?explorer=true) in the API Explorer.