diff --git a/docs/api-routes/response-helpers.md b/docs/api-routes/response-helpers.md
index 58477cf274cf..f2b8c93a8d1d 100644
--- a/docs/api-routes/response-helpers.md
+++ b/docs/api-routes/response-helpers.md
@@ -98,6 +98,8 @@ export default function handler(
 }
 ```
 
+> Note: The body of `NextApiRequest` is `any` because the client may include any payload. You should validate the type/shape of the body at runtime before using it.
+
 To view more examples using types, check out the [TypeScript documentation](/docs/basic-features/typescript.md#api-routes).
 
 If you prefer to view your examples within a real projects structure you can checkout our examples repository: