Facebook Messenger Clothing Sales Bot with n8n, Gemini & Stripe

Turn Facebook Messenger chats into a complete clothing sales experience—automated with n8n, Google Gemini, and Stripe

With this Facebook Messenger Clothing Sales Bot workflow for n8n, customer messages automatically become product discovery, cart management, and Stripe Checkout payments—while your data stays organized in n8n Data Tables and customer context is remembered in Postgres.

What this workflow does

• Receives and validates Meta webhooks for your Facebook Page, acknowledges events immediately, and filters for real customer messages.
• De-duplicates and consolidates messages: it avoids duplicate processing and briefly waits to combine quick follow-up messages from the same customer.
• Tracks customer activity and upserts customer records in n8n Data Tables, then creates or retrieves an open cart order in the Sales Orders table.
• Uses a Google Gemini agent with Postgres chat memory and n8n-backed tools to:
  • List/search products (via a pgvector index),
  • Fetch live product details,
  • Manage cart items and save delivery details.
• Creates a Stripe Checkout flow after the customer confirms: it re-validates prices, variants, stock, and delivery details, then sends a Messenger “Pay Now” button.
• Handles Stripe webhooks: verifies the Stripe signature, marks the order as Paid, records order line items, reduces inventory stock, and sends a confirmation message back in Messenger.
• Supports escalation when the agent needs a hand (e.g., complex questions).

Use cases

• Automating clothing sales via Facebook Messenger—from “Do you have this size?” to checkout.
• Building an AI-assisted product catalog that searches intelligently using pgvector.
• Running a small e-commerce bot with Stripe Checkout and reliable order/order-item tracking in n8n.

Technical details

• n8n nodes/functions include: if, set, code, wait, crypto, filter
• Facebook (Meta) webhook handling and message filtering
• Google Gemini agent with Postgres chat memory and n8n Data Tables tools
• Product search via pgvector
• Stripe Checkout session creation and Stripe webhook signature verification