How to build a WhatsApp Chatbot with n8n, AWS, and OpenAI

If you want to build your own WhatsApp chatbot to receive text and voice messages, process them with AI, and reply automatically, this guide shows a practical way to do it using n8n + OpenAI + Meta + AWS. 🧠 What will you learn? In this post you will see how to: Connect OpenAI AI services with n8n Connect WhatsApp Business Cloud services with n8n Receive text and voice messages and reply automatically from an n8n workflow Estimate basic operation costs 🛠️ Implementation step by step 1. Prerequisites ✅ Before you start, you need: An OpenAI account with balance A Meta Developer account (you can use your personal Facebook account) A domain to publish n8n with HTTPS Access to n8n (self-hosted or cloud service) Download the whatsapp-chatbot repository for installation and setup 2. Import chatbot workflow 💬 Import the workflow from the n8n folder in the whatsapp-chatbot repository. Copy and paste the content of the whatsapp-chatbot.json file into n8n. This workflow allows you to: Receive t