---
# @generated by sylphx-gen 0.1.0 from contracts@e145cc7cf1bc9605f2b27439e5e17ed76a1a2fd7e7021906a013f7565e4a0cd5. Do not edit.
title: "VALIDATE_ONLY_NOT_SUPPORTED"
description: "VALIDATE_ONLY_NOT_SUPPORTED (INVALID_ARGUMENT, HTTP 400): The method has no dry run; a request with `validate_only` is refused before anything is written."
type: reference
product: platform
summary: "The method has no dry run; a request with `validate_only` is refused before anything is written."
updated: 2026-09-28
nav: false
---

The method has no dry run; a request with `validate_only` is refused before anything is written.

**HTTP** 400 · **gRPC** `INVALID_ARGUMENT` · [the error body](/docs/platform/errors)

No method in the registry declares it; it is returned by the platform
itself.