diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53ca7b6817b..15326bc2fba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ Docs: https://docs.openclaw.ai
 - Docs: add direct BotFather link and verification reminder in Telegram setup. (#4064) Thanks @shatner.
 - Docs: add Mintlify language navigation for zh-Hans. (#6416) Thanks @joshp123.
 - Telegram: use shared pairing store. (#6127) Thanks @obviyus.
+- Agents: add OpenRouter app attribution headers. (#5050) Thanks @alexanderatallah.
 
 ### Fixes
 
diff --git a/src/agents/pi-embedded-runner-extraparams.test.ts b/src/agents/pi-embedded-runner-extraparams.test.ts
index 574bb550def..2053a87d668 100644
--- a/src/agents/pi-embedded-runner-extraparams.test.ts
+++ b/src/agents/pi-embedded-runner-extraparams.test.ts
@@ -1,5 +1,8 @@
+import type { StreamFn } from "@mariozechner/pi-agent-core";
+import type { Context, Model, SimpleStreamOptions } from "@mariozechner/pi-ai";
+import { AssistantMessageEventStream } from "@mariozechner/pi-ai";
 import { describe, expect, it } from "vitest";
-import { resolveExtraParams } from "./pi-embedded-runner.js";
+import { applyExtraParamsToAgent, resolveExtraParams } from "./pi-embedded-runner.js";
 
 describe("resolveExtraParams", () => {
   it("returns undefined with no model config", () => {
@@ -60,3 +63,32 @@ describe("resolveExtraParams", () => {
     expect(result).toBeUndefined();
   });
 });
+
+describe("applyExtraParamsToAgent", () => {
+  it("adds OpenRouter attribution headers to stream options", () => {
+    const calls: Array<SimpleStreamOptions | undefined> = [];
+    const baseStreamFn: StreamFn = (_model, _context, options) => {
+      calls.push(options);
+      return new AssistantMessageEventStream();
+    };
+    const agent = { streamFn: baseStreamFn };
+
+    applyExtraParamsToAgent(agent, undefined, "openrouter", "openrouter/auto");
+
+    const model = {
+      api: "openai-completions",
+      provider: "openrouter",
+      id: "openrouter/auto",
+    } as Model<"openai-completions">;
+    const context: Context = { messages: [] };
+
+    void agent.streamFn?.(model, context, { headers: { "X-Custom": "1" } });
+
+    expect(calls).toHaveLength(1);
+    expect(calls[0]?.headers).toEqual({
+      "HTTP-Referer": "https://openclaw.ai",
+      "X-Title": "OpenClaw",
+      "X-Custom": "1",
+    });
+  });
+});
diff --git a/src/agents/pi-embedded-runner/extra-params.ts b/src/agents/pi-embedded-runner/extra-params.ts
index 60a30973ddc..fdfbaa47c21 100644
--- a/src/agents/pi-embedded-runner/extra-params.ts
+++ b/src/agents/pi-embedded-runner/extra-params.ts
@@ -108,7 +108,7 @@ function createStreamFnWithExtraParams(
 function createOpenRouterHeadersWrapper(baseStreamFn: StreamFn | undefined): StreamFn {
   const underlying = baseStreamFn ?? streamSimple;
   return (model, context, options) =>
-    underlying(model as Model<Api>, context, {
+    underlying(model, context, {
       ...options,
       headers: {
         ...OPENROUTER_APP_HEADERS,