diff --git a/packages/langbase/src/common/request.ts b/packages/langbase/src/common/request.ts
index 35d2106..548413d 100644
--- a/packages/langbase/src/common/request.ts
+++ b/packages/langbase/src/common/request.ts
@@ -1,6 +1,7 @@
 import {Headers} from './../../types'; // Ensure this import is correct
 import {APIConnectionError, APIError} from './errors';
 import {Stream} from './stream';
+import 'dotenv/config';
 
 interface RequestOptions {
 	endpoint: string;
@@ -14,6 +15,7 @@ interface RequestConfig {
 	apiKey: string;
 	baseUrl: string;
 	timeout?: number;
+	id?: string;
 }
 
 interface SendOptions extends RequestOptions {
@@ -34,9 +36,11 @@ interface HandleGenerateResponseParams {
 
 export class Request {
 	private config: RequestConfig;
+	private demo: string = '';
 
 	constructor(config: RequestConfig) {
 		this.config = config;
+		this.demo = process.env.LB_DEMO || '';
 	}
 
 	// Main send function
@@ -82,6 +86,8 @@ export class Request {
 		return {
 			'Content-Type': 'application/json',
 			Authorization: `Bearer ${this.config.apiKey}`,
+			'lb-meta-external-user-id': this.config.id || '',
+			'lb-demo-id': this.demo,
 			...headers,
 		};
 	}
diff --git a/packages/langbase/src/pipes/pipes.ts b/packages/langbase/src/pipes/pipes.ts
index f2db0df..e0a2a9b 100644
--- a/packages/langbase/src/pipes/pipes.ts
+++ b/packages/langbase/src/pipes/pipes.ts
@@ -97,6 +97,7 @@ export interface StreamChunk {
 export interface PipeOptions {
 	apiKey: string;
 	baseUrl?: string;
+	id?: string;
 }
 
 export class Pipe {
@@ -104,7 +105,11 @@ export class Pipe {
 
 	constructor(options: PipeOptions) {
 		const baseUrl = 'https://api.langbase.com';
-		this.request = new Request({apiKey: options.apiKey, baseUrl});
+		this.request = new Request({
+			baseUrl,
+			id: options.id,
+			apiKey: options.apiKey,
+		});
 	}
 
 	async generateText(options: GenerateOptions): Promise<GenerateResponse> {
diff --git a/turbo.json b/turbo.json
index cedb898..efd9504 100644
--- a/turbo.json
+++ b/turbo.json
@@ -28,7 +28,8 @@
         "ASSISTANT_ID",
         "INKEEP_API_KEY",
         "INKEEP_INTEGRATION_ID",
-        "VERCEL_URL"
+        "VERCEL_URL",
+        "LB_DEMO"
       ],
       "outputs": [
         "dist/**",