diff --git a/extensions/whatsapp/src/session.test.ts b/extensions/whatsapp/src/session.test.ts
index 92613cf19f51..f2e0fa872ea8 100644
--- a/extensions/whatsapp/src/session.test.ts
+++ b/extensions/whatsapp/src/session.test.ts
@@ -41,6 +41,7 @@ const useMultiFileAuthStateMock = vi.mocked(baileys.useMultiFileAuthState);
 let createWaSocket: typeof import("./session.js").createWaSocket;
 let formatError: typeof import("./session.js").formatError;
 let logWebSelfId: typeof import("./session.js").logWebSelfId;
+let OPENCLAW_WHATSAPP_WEB_SOCKET_URL_ENV: typeof import("./session.js").OPENCLAW_WHATSAPP_WEB_SOCKET_URL_ENV;
 let renderQrTerminalMock: ReturnType<typeof vi.fn>;
 let waitForWaConnection: typeof import("./session.js").waitForWaConnection;
 let waitForCredsSaveQueue: typeof import("./session.js").waitForCredsSaveQueue;
@@ -153,6 +154,7 @@ function readLastSocketOptions(): {
   fetchAgent?: unknown;
   keepAliveIntervalMs?: number;
   printQRInTerminal?: boolean;
+  waWebSocketUrl?: string | URL;
   logger?: { level?: string; trace?: unknown };
 } {
   const [options] = firstMockCall(
@@ -169,6 +171,7 @@ function readLastSocketOptions(): {
     fetchAgent?: unknown;
     keepAliveIntervalMs?: number;
     printQRInTerminal?: boolean;
+    waWebSocketUrl?: string | URL;
     logger?: { level?: string; trace?: unknown };
   };
 }
@@ -224,6 +227,7 @@ describe("web session", () => {
       createWaSocket,
       formatError,
       logWebSelfId,
+      OPENCLAW_WHATSAPP_WEB_SOCKET_URL_ENV,
       waitForWaConnection,
       waitForCredsSaveQueue,
       writeCredsJsonAtomically,
@@ -411,6 +415,40 @@ describe("web session", () => {
     expect(passed.defaultQueryTimeoutMs).toBe(120_000);
   });
 
+  it("passes explicit Baileys WebSocket URL overrides", async () => {
+    await createWaSocket(false, false, {
+      waWebSocketUrl: " ws://127.0.0.1:49152/ws/chat ",
+    });
+
+    expect(readLastSocketOptions().waWebSocketUrl).toBe("ws://127.0.0.1:49152/ws/chat");
+  });
+
+  it("uses OPENCLAW_WHATSAPP_WEB_SOCKET_URL as the default Baileys WebSocket URL", async () => {
+    vi.stubEnv(OPENCLAW_WHATSAPP_WEB_SOCKET_URL_ENV, " ws://127.0.0.1:49153/ws/chat ");
+
+    await createWaSocket(false, false);
+
+    expect(readLastSocketOptions().waWebSocketUrl).toBe("ws://127.0.0.1:49153/ws/chat");
+  });
+
+  it("preserves explicit Baileys WebSocket URL options over environment", async () => {
+    vi.stubEnv(OPENCLAW_WHATSAPP_WEB_SOCKET_URL_ENV, "ws://127.0.0.1:49153/ws/chat");
+
+    await createWaSocket(false, false, {
+      waWebSocketUrl: "ws://127.0.0.1:49154/ws/chat",
+    });
+
+    expect(readLastSocketOptions().waWebSocketUrl).toBe("ws://127.0.0.1:49154/ws/chat");
+  });
+
+  it("ignores blank Baileys WebSocket URL environment overrides", async () => {
+    vi.stubEnv(OPENCLAW_WHATSAPP_WEB_SOCKET_URL_ENV, " ");
+
+    await createWaSocket(false, false);
+
+    expect(readLastSocketOptions().waWebSocketUrl).toBeUndefined();
+  });
+
   it("uses ambient env proxy agent when HTTPS_PROXY is configured", async () => {
     vi.stubEnv("HTTPS_PROXY", "http://proxy.test:8080");
 
diff --git a/extensions/whatsapp/src/session.ts b/extensions/whatsapp/src/session.ts
index 5c4a06cb80b4..1a90dfa0c564 100644
--- a/extensions/whatsapp/src/session.ts
+++ b/extensions/whatsapp/src/session.ts
@@ -68,6 +68,7 @@ const LOGGED_OUT_STATUS = 401;
 const WHATSAPP_WEBSOCKET_PROXY_TARGET = "https://mmg.whatsapp.net/";
 const CREDS_FLUSH_TIMEOUT_MESSAGE =
   "Queued WhatsApp creds save did not finish before auth bootstrap; skipping repair and continuing with primary creds.";
+export const OPENCLAW_WHATSAPP_WEB_SOCKET_URL_ENV = "OPENCLAW_WHATSAPP_WEB_SOCKET_URL";
 
 async function rejectUnsafeWebCredsPath(authDir: string): Promise<void> {
   await assertWebCredsPathRegularFileOrMissing(resolveWebCredsPath(authDir));
@@ -125,6 +126,13 @@ async function printTerminalQr(qr: string): Promise<void> {
   process.stdout.write(output.endsWith("\n") ? output : `${output}\n`);
 }
 
+function resolveWaWebSocketUrl(value: string | URL | undefined): string | URL | undefined {
+  if (typeof value !== "string") {
+    return value;
+  }
+  return value.trim() || undefined;
+}
+
 /**
  * Create a Baileys socket backed by the multi-file auth store we keep on disk.
  * Consumers can opt into QR printing for interactive login flows.
@@ -137,6 +145,7 @@ export async function createWaSocket(
     onQr?: (qr: string) => void;
     getMessage?: (key: WAMessageKey) => Promise<proto.IMessage | undefined>;
     cachedGroupMetadata?: (jid: string) => Promise<GroupMetadata | undefined>;
+    waWebSocketUrl?: string | URL;
   } & WhatsAppSocketTimingOptions = {},
 ): Promise<ReturnType<typeof makeWASocket>> {
   const baseLogger = getChildLogger(
@@ -172,6 +181,9 @@ export async function createWaSocket(
     defaultQueryTimeoutMs:
       opts.defaultQueryTimeoutMs ?? DEFAULT_WHATSAPP_SOCKET_TIMING.defaultQueryTimeoutMs,
   };
+  const waWebSocketUrl =
+    resolveWaWebSocketUrl(opts.waWebSocketUrl) ??
+    resolveWaWebSocketUrl(process.env[OPENCLAW_WHATSAPP_WEB_SOCKET_URL_ENV]);
   const sock = makeWASocket({
     auth: {
       creds: state.creds,
@@ -188,6 +200,7 @@ export async function createWaSocket(
     // Baileys types still model `fetchAgent` as a Node agent even though the
     // runtime path accepts an undici dispatcher for upload fetches.
     fetchAgent: fetchAgent as Agent | undefined,
+    ...(waWebSocketUrl ? { waWebSocketUrl } : {}),
     ...(opts.getMessage ? { getMessage: opts.getMessage } : {}),
     ...(opts.cachedGroupMetadata ? { cachedGroupMetadata: opts.cachedGroupMetadata } : {}),
   });
diff --git a/src/infra/dotenv.test.ts b/src/infra/dotenv.test.ts
index 742507f80cfb..2abbe4c2370a 100644
--- a/src/infra/dotenv.test.ts
+++ b/src/infra/dotenv.test.ts
@@ -921,6 +921,7 @@ describe("workspace .env blocklist completeness", () => {
           "OPENCLAW_DISABLE_BUNDLED_PLUGINS",
           "OPENCLAW_ALLOW_INSECURE_PRIVATE_WS",
           "OPENCLAW_BROWSER_EXECUTABLE_PATH",
+          "OPENCLAW_WHATSAPP_WEB_SOCKET_URL",
           "EXAMPLE_API_HOST",
           "HOMEBREW_BREW_FILE",
           "HOMEBREW_PREFIX",