Turning an Existing Express API into a Conversational Backend (Konsier Integration)

In Part 2, I broke down the architecture behind conversational systems: Agents → Tools → Backend → Channels Now let’s make it real. In this post, I’ll walk through how I integrated this model into an existing Express API using Konsier. No rewrite. No new backend. Just layering a conversational interface on top of what already exists. Starting Point I already had a simple Express + PostgreSQL backend. It exposed endpoints like: GET /menu POST /orders GET /orders/:id PATCH /orders/:id Typical setup: Client → Express API → Database The goal was: Allow users to interact with this backend through chat (Telegram, WhatsApp, etc.) without rewriting the API. What Changes (and What Doesn’t) The important thing to understand: Your backend stays the same. You’re not replacing your API. You’re adding a new layer: User (chat) ↓ Konsier ↓ Express API ↓ Database Step 1 — Install Konsier npm install konsier If you're using Express: npm install express Step 2 — Define Your First Tool Tools are how your