diff --git a/cypher-executor/src/actions/auth-dispatcher.ts b/cypher-executor/src/actions/auth-dispatcher.ts
index f9b1e69..e1de675 100644
--- a/cypher-executor/src/actions/auth-dispatcher.ts
+++ b/cypher-executor/src/actions/auth-dispatcher.ts
@@ -20,10 +20,23 @@
 import type { Bindings } from '../types';
 import { resolveAuthRecipe, resolveRecipe } from '../routes/recipes';
 import { wasmWorkerUrl } from '../lib/component-loader';
+import type { ServiceBinding } from '../types';
 
 /** 對應 Phase 1-4 會部署的 auth primitive Worker */
 const SUPPORTED_PRIMITIVES = new Set(['static_key', 'service_account', 'oauth2']);
 
+/**
+ * primitive 名 → service binding key（Phase 7，2026-06-06）。
+ * 比照 component-loader 的邏輯零件：有 binding 走 CF 內部 RPC（繞開同 zone 522 + 同帳號 workers.dev 1042），
+ * 無 binding（如 self-hosted 未綁、或 mtls 未部署）fallback 到 fetch(workers.dev)。
+ */
+const AUTH_BINDING_MAP: Record<string, keyof import('../types').Bindings> = {
+  static_key: 'SVC_AUTH_STATIC_KEY',
+  service_account: 'SVC_AUTH_SERVICE_ACCOUNT',
+  oauth2: 'SVC_AUTH_OAUTH2',
+  mtls: 'SVC_AUTH_MTLS',
+};
+
 /** auth primitive 本身的 componentId(避免自引用) */
 const AUTH_PRIMITIVE_IDS = new Set([
   'auth_static_key',
@@ -62,18 +75,27 @@ export async function tryAuthDispatch(
   if (!recipe) return null;
   if (!SUPPORTED_PRIMITIVES.has(recipe.primitive)) return null;
 
-  // 走新路徑:HTTP POST 到對應 auth primitive Worker
-  // 走 workers.dev 避開同 zone 死鎖（P0 #9）
-  const primitiveUrl = wasmWorkerUrl(`auth_${recipe.primitive}`, env.WORKER_SUBDOMAIN);
-  const res = await fetch(primitiveUrl, {
+  // 呼叫對應 auth primitive Worker（Phase 7，2026-06-06）：
+  // binding 優先（CF 內部 RPC，繞開同 zone 522 + 同帳號 workers.dev 子請求 1042，壓測階段 11），
+  // 無 binding（self-hosted 未綁 / mtls 未部署）fallback 到 fetch(workers.dev)。比照 component-loader makeLogicRunner。
+  const reqInit = {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
-    body: JSON.stringify({
-      action: 'authenticate',
-      api_key: apiKey,
-      service,
-    }),
-  });
+    body: JSON.stringify({ action: 'authenticate', api_key: apiKey, service }),
+  };
+
+  const bindingKey = AUTH_BINDING_MAP[recipe.primitive];
+  const svc = bindingKey ? (env[bindingKey] as ServiceBinding | undefined) : undefined;
+
+  let res: Response;
+  if (svc) {
+    // service binding：用任意 URL，CF 內部 RPC 直送目標 Worker（不經公網）
+    res = await svc.fetch(new Request('https://auth-primitive/', reqInit));
+  } else {
+    // fallback：公網 workers.dev（自架未綁 binding / 開發環境 / mtls）
+    const primitiveUrl = wasmWorkerUrl(`auth_${recipe.primitive}`, env.WORKER_SUBDOMAIN);
+    res = await fetch(primitiveUrl, reqInit);
+  }
 
   if (!res.ok) {
     const text = await res.text().catch(() => '');
diff --git a/cypher-executor/src/types.ts b/cypher-executor/src/types.ts
index 698c309..ea4e5c9 100644
--- a/cypher-executor/src/types.ts
+++ b/cypher-executor/src/types.ts
@@ -21,6 +21,12 @@ export type Bindings = {
   SVC_DATE_OPS: ServiceBinding;
   SVC_VALIDATE_JSON: ServiceBinding;
   // SVC_AI_TRANSFORM_* 已移除（Phase 2 刪 ai_transform 零件 + wrangler.toml service binding）
+  // Auth primitive Service Bindings（Phase 7，2026-06-06）：繞開 self-hosted 同帳號 workers.dev 子請求 1042。
+  // optional：auth_mtls 尚未部署（無 binding）；無 binding 時 auth-dispatcher fallback 到 fetch(workers.dev)。
+  SVC_AUTH_STATIC_KEY?: ServiceBinding;
+  SVC_AUTH_SERVICE_ACCOUNT?: ServiceBinding;
+  SVC_AUTH_OAUTH2?: ServiceBinding;
+  SVC_AUTH_MTLS?: ServiceBinding;
   // KV Context Store：節點 output 透過 KV 傳遞，解決同名欄位衝突
   EXEC_CONTEXT: KVNamespace;
   // Recipe Store：API recipe 定義（key: recipe:{canonical_id} 或 idx:{hash_id}）
diff --git a/cypher-executor/wrangler.toml b/cypher-executor/wrangler.toml
index b1ad7eb..b294da7 100644
--- a/cypher-executor/wrangler.toml
+++ b/cypher-executor/wrangler.toml
@@ -91,6 +91,24 @@ service = "arcrun-date-ops"
 binding = "SVC_VALIDATE_JSON"
 service = "arcrun-validate-json"
 
+# Auth primitive service bindings（credential-primitives-wasm Phase 7，2026-06-06）
+# 為何：auth-dispatcher 原用 fetch(workers.dev) 打同帳號 auth worker，self-hosted 帳號踩 CF 1042
+#       （壓測階段 11）。service binding 是 CF 內部 RPC，繞開同 zone 522 + 同帳號 1042。
+# 範圍：只綁「已部署」的 auth worker。auth_mtls 尚未部署（.component-builds 無、官方 404），
+#       綁不存在的 worker 會讓 deploy 報 "referenced Worker not found"（見上 ai_transform 教訓），
+#       故 mtls 待它部署後再加。auth-dispatcher 對無 binding 的 primitive 自動 fallback fetch。
+[[services]]
+binding = "SVC_AUTH_STATIC_KEY"
+service = "arcrun-auth-static-key"
+
+[[services]]
+binding = "SVC_AUTH_SERVICE_ACCOUNT"
+service = "arcrun-auth-service-account"
+
+[[services]]
+binding = "SVC_AUTH_OAUTH2"
+service = "arcrun-auth-oauth2"
+
 # ai_transform_compile / ai_transform_run 已於 Phase 2（2026-05-29）刪除
 # （Arcrun 是 AI 呼叫的工具，工作流不該內嵌 AI 節點）。對應 worker 已 wrangler delete，
 # service binding 一併移除（否則 deploy 報 referenced Worker not found）。