diff --git a/deno_dist/helper/ssg/index.ts b/deno_dist/helper/ssg/index.ts
index 4dad2424a..c46601a18 100644
--- a/deno_dist/helper/ssg/index.ts
+++ b/deno_dist/helper/ssg/index.ts
@@ -2,13 +2,14 @@ import { replaceUrlParam } from '../../client/utils.ts'
 import type { Context } from '../../context.ts'
 import { inspectRoutes } from '../../helper/dev/index.ts'
 import type { Hono } from '../../hono.ts'
+import { METHOD_NAME_ALL } from '../../router.ts'
 import type { Env, MiddlewareHandler, Schema } from '../../types.ts'
 import { bufferToString } from '../../utils/buffer.ts'
 import { getExtension } from '../../utils/mime.ts'
 import { joinPaths, dirname } from './utils.ts'
 
-export const X_HONO_SSG_HEADER_KEY = 'x-hono-ssg'
-export const X_HONO_DISABLE_SSG_HEADER_KEY = 'x-hono-disable-ssg'
+const SSG_CONTEXT = 'HONO_SSG_CONTEXT'
+export const SSG_DISABLED_RESPONSE = new Response('SSG is disabled', { status: 404 })
 
 /**
  * @experimental
@@ -123,7 +124,7 @@ export const fetchRoutesContent = async <
   const baseURL = 'http://localhost'
 
   for (const route of inspectRoutes(app)) {
-    if (route.isMiddleware) {
+    if (route.isMiddleware || (route.method !== 'GET' && route.method !== METHOD_NAME_ALL)) {
       continue
     }
 
@@ -131,7 +132,6 @@ export const fetchRoutesContent = async <
     const thisRouteBaseURL = new URL(route.path, baseURL).toString()
 
     let forGetInfoURLRequest = new Request(thisRouteBaseURL) as AddedSSGDataRequest
-    forGetInfoURLRequest.headers.set(X_HONO_SSG_HEADER_KEY, 'true')
     if (beforeRequestHook) {
       const maybeRequest = beforeRequestHook(forGetInfoURLRequest)
       if (!maybeRequest) {
@@ -150,10 +150,9 @@ export const fetchRoutesContent = async <
 
     for (const param of forGetInfoURLRequest.ssgParams) {
       const replacedUrlParam = replaceUrlParam(route.path, param)
-      let response = await app.request(replacedUrlParam, forGetInfoURLRequest)
-      if (response.headers.get(X_HONO_DISABLE_SSG_HEADER_KEY)) {
-        continue
-      }
+      let response = await app.request(replacedUrlParam, forGetInfoURLRequest, {
+        [SSG_CONTEXT]: true,
+      })
       if (afterResponseHook) {
         const maybeResponse = afterResponseHook(response)
         if (!maybeResponse) {
@@ -161,6 +160,9 @@ export const fetchRoutesContent = async <
         }
         response = maybeResponse
       }
+      if (response === SSG_DISABLED_RESPONSE) {
+        continue
+      }
       const mimeType = response.headers.get('Content-Type')?.split(';')[0] || 'text/plain'
       const content = await parseResponseContent(response)
       htmlMap.set(replacedUrlParam, {
@@ -261,14 +263,22 @@ export const toSSG: ToSSGInterface = async (app, fs, options) => {
 
 /**
  * @experimental
- * `disableSSG` is an experimental feature.
+ * `isSSGContext` is an experimental feature.
  * The API might be changed.
  */
+export const isSSGContext = (c: Context): boolean => !!c.env?.[SSG_CONTEXT]
 
+/**
+ * @experimental
+ * `disableSSG` is an experimental feature.
+ * The API might be changed.
+ */
 export const disableSSG = (): MiddlewareHandler =>
   async function disableSSG(c, next) {
+    if (isSSGContext(c)) {
+      return SSG_DISABLED_RESPONSE
+    }
     await next()
-    c.header(X_HONO_DISABLE_SSG_HEADER_KEY, 'true')
   }
 
 /**
@@ -278,9 +288,8 @@ export const disableSSG = (): MiddlewareHandler =>
  */
 export const onlySSG = (): MiddlewareHandler =>
   async function onlySSG(c, next) {
-    const headerValue = c.req.raw.headers.get(X_HONO_SSG_HEADER_KEY)
-    if (headerValue) {
-      await next()
+    if (!isSSGContext(c)) {
+      return c.notFound()
     }
-    return c.notFound()
+    await next()
   }