diff --git a/extensions/voice-call/src/config.ts b/extensions/voice-call/src/config.ts
index fbff23d45de4..f16994c1e6be 100644
--- a/extensions/voice-call/src/config.ts
+++ b/extensions/voice-call/src/config.ts
@@ -9,6 +9,7 @@ import {
 import { z } from "zod";
 import { TtsConfigSchema } from "../api.js";
 import { deepMergeDefined } from "./deep-merge.js";
+import { normalizePath } from "./path-utils.js";
 import { DEFAULT_VOICE_CALL_REALTIME_INSTRUCTIONS } from "./realtime-defaults.js";
 
 // -----------------------------------------------------------------------------
@@ -521,20 +522,8 @@ function cloneDefaultVoiceCallConfig(): VoiceCallConfig {
   return structuredClone(DEFAULT_VOICE_CALL_CONFIG);
 }
 
-function normalizeWebhookLikePath(pathname: string): string {
-  const trimmed = pathname.trim();
-  if (!trimmed) {
-    return "/";
-  }
-  const prefixed = trimmed.startsWith("/") ? trimmed : `/${trimmed}`;
-  if (prefixed === "/") {
-    return prefixed;
-  }
-  return prefixed.endsWith("/") ? prefixed.slice(0, -1) : prefixed;
-}
-
 function defaultRealtimeStreamPathForServePath(servePath: string): string {
-  const normalized = normalizeWebhookLikePath(servePath);
+  const normalized = normalizePath(servePath);
   if (normalized.endsWith("/webhook")) {
     return `${normalized.slice(0, -"/webhook".length)}/stream/realtime`;
   }
diff --git a/extensions/voice-call/src/path-utils.ts b/extensions/voice-call/src/path-utils.ts
new file mode 100644
index 000000000000..c2be91c5bafa
--- /dev/null
+++ b/extensions/voice-call/src/path-utils.ts
@@ -0,0 +1,12 @@
+// Voice Call plugin module implements shared path normalization.
+export function normalizePath(pathname: string): string {
+  const trimmed = pathname.trim();
+  if (!trimmed) {
+    return "/";
+  }
+  const prefixed = trimmed.startsWith("/") ? trimmed : `/${trimmed}`;
+  if (prefixed === "/") {
+    return prefixed;
+  }
+  return prefixed.endsWith("/") ? prefixed.slice(0, -1) : prefixed;
+}
diff --git a/extensions/voice-call/src/webhook/realtime-handler.ts b/extensions/voice-call/src/webhook/realtime-handler.ts
index 47b378d6ed23..c58e05b67a9d 100644
--- a/extensions/voice-call/src/webhook/realtime-handler.ts
+++ b/extensions/voice-call/src/webhook/realtime-handler.ts
@@ -30,6 +30,7 @@ import { createSubsystemLogger } from "openclaw/plugin-sdk/runtime-env";
 import WebSocket, { WebSocketServer } from "ws";
 import type { VoiceCallRealtimeConfig } from "../config.js";
 import type { CallManager } from "../manager.js";
+import { normalizePath } from "../path-utils.js";
 import type { VoiceCallProvider } from "../providers/base.js";
 import type { CallRecord, NormalizedEvent } from "../types.js";
 import type { WebhookResponsePayload } from "../webhook.types.js";
@@ -64,18 +65,6 @@ const RECENT_FINAL_USER_TRANSCRIPT_TTL_MS = 2_000;
 const BARGE_IN_REQUIRED_LOUD_CHUNKS = 2;
 const logger = createSubsystemLogger("voice-call/realtime");
 
-function normalizePath(pathname: string): string {
-  const trimmed = pathname.trim();
-  if (!trimmed) {
-    return "/";
-  }
-  const prefixed = trimmed.startsWith("/") ? trimmed : `/${trimmed}`;
-  if (prefixed === "/") {
-    return prefixed;
-  }
-  return prefixed.endsWith("/") ? prefixed.slice(0, -1) : prefixed;
-}
-
 function buildGreetingInstructions(
   baseInstructions: string | undefined,
   greeting: string | undefined,