feat: add integration header (#6)

Author: domantas-jurkus-dcd

README.md

@@ -19,6 +19,14 @@ npm install @decodo/langchain-ts
 
 ## Quick Start
 
+To use the tools in this project, you will need a [Decodo Advanced Web Scraping API](https://help.decodo.com/docs/web-scraping-api-core-and-advanced-plans) subscription. Free trials are available on the [dashboard](https://dashboard.decodo.com/).
+
+Once you have a plan activated, take a note of your generated username and password:
+
+![Decodo dashboard](img/auth.png 'Decodo dashboard')
+
+A simple agentic example:
+
 ```typescript
 import { DecodoUniversalTool } from '@decodo/langchain-ts';
 

src/tools/decodo-base-tool.ts

@@ -41,6 +41,9 @@ export class DecodoBaseTool extends StructuredTool<InputSchemaZodType> {
 
       const response = await this.client.request<ScraperApiResponse>({
         method: 'POST',
+        headers: {
+          'x-integration': 'langchain',
+        },
         data: {
           ...(target && { target }),
           ...(url && { url }),