diff --git a/packages/sdk/src/internal/providers/bailian/client.ts b/packages/sdk/src/internal/providers/bailian/client.ts
index 9c70034..25060a0 100644
--- a/packages/sdk/src/internal/providers/bailian/client.ts
+++ b/packages/sdk/src/internal/providers/bailian/client.ts
@@ -29,6 +29,7 @@ export class BailianClient extends BaseApiClient {
 		return {
 			"Content-Type": "application/json",
 			Authorization: `Bearer ${this.apiKey}`,
+			"x-dashscope-source-config": "openagentpack",
 		};
 	}
 
diff --git a/packages/sdk/tests/unit/bailian-webhook.test.ts b/packages/sdk/tests/unit/bailian-webhook.test.ts
index f33902e..37b1cce 100644
--- a/packages/sdk/tests/unit/bailian-webhook.test.ts
+++ b/packages/sdk/tests/unit/bailian-webhook.test.ts
@@ -260,7 +260,11 @@ describe("Bailian webhook wire contract", () => {
 			expect(calls).toHaveLength(1);
 			expect(calls[0]?.url).toBe(`${BASE_URL}${scenario.path}`);
 			expect(calls[0]?.init?.method).toBe(scenario.method);
-			expect(calls[0]?.init?.headers).toEqual({ "Content-Type": "application/json", Authorization: "Bearer sk-test" });
+			expect(calls[0]?.init?.headers).toEqual({
+				"Content-Type": "application/json",
+				Authorization: "Bearer sk-test",
+				"x-dashscope-source-config": "openagentpack",
+			});
 			expect(calls[0]?.init?.signal).toBe(controller.signal);
 			expect(calls[0]?.init?.body).toBe(scenario.body === undefined ? undefined : JSON.stringify(scenario.body));
 		});
diff --git a/packages/sdk/tests/unit/bailian.test.ts b/packages/sdk/tests/unit/bailian.test.ts
index 17f361b..f9f9686 100644
--- a/packages/sdk/tests/unit/bailian.test.ts
+++ b/packages/sdk/tests/unit/bailian.test.ts
@@ -1,5 +1,6 @@
 import { afterEach, describe, expect, test } from "bun:test";
 import { BailianAdapter } from "../../src/internal/providers/bailian/adapter.ts";
+import { BailianClient } from "../../src/internal/providers/bailian/client.ts";
 import { bailianConfigSchema } from "../../src/internal/providers/bailian/config.ts";
 import { mapAgent, mapEnvironment, mapInitialEvents, mapSession } from "../../src/internal/providers/bailian/mapper.ts";
 import type { ResolvedAgentRefs } from "../../src/internal/providers/interface.ts";
@@ -54,6 +55,23 @@ describe("bailianConfigSchema", () => {
 	});
 });
 
+describe("BailianClient source-config header", () => {
+	test("every MA request carries x-dashscope-source-config", async () => {
+		const client = new BailianClient({ apiKey: "sk-test", baseUrl: "https://bailian.test/api/v1/agentstudio" });
+		const captured: Headers[] = [];
+		globalThis.fetch = (async (_input: RequestInfo | URL, init?: RequestInit) => {
+			captured.push(new Headers(init?.headers));
+			return Response.json({ id: "agent_x", name: "Agents/x" });
+		}) as typeof fetch;
+
+		await client.get("/agents/agent_x");
+
+		expect(captured).toHaveLength(1);
+		expect(captured[0]?.get("x-dashscope-source-config")).toBe("openagentpack");
+		expect(captured[0]?.get("Authorization")).toBe("Bearer sk-test");
+	});
+});
+
 describe("BailianAdapter archived agents", () => {
 	test("does not treat an archived agent id as an updatable resource", async () => {
 		const adapter = new BailianAdapter("sk-test", "ws-test", "https://bailian.test/api/v1/agentstudio");