Block 1 - Embeddings OpenAI1
- Type / Role
- @n8n/n8n-nodes-langchain.embeddingsOpenAi - embeddingsOpenAi
- Config choices
- Version 1.2
Handle WhatsApp sales queries with GPT-4, Supabase, and a product catalog
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1. Workflow Overview
How it works An AI powered sales agent on WhatsApp that handles product inquiries using your Supabase knowledge base and n8n catalog. Customers can send text, voice notes, or images to ask about pr...
Best for
- Lead Nurturing automation workflows
- AI Chatbot automation workflows
- advanced n8n builders looking for reusable templates
Tools used
@n8n/n8n-nodes-langchain.embeddingsopenai, n8n-nodes-base.stickynote, @n8n/n8n-nodes-langchain.vectorstoresupabase, @n8n/n8n-nodes-langchain.textsplitterrecursivecharactertextsplitter, @n8n/n8n-nodes-langchain.documentdefaultdataloader, n8n-nodes-base.switch, n8n-nodes-base.httprequest, n8n-nodes-base.whatsapp
Source and attribution
This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Shadrack.
Original n8n.io source1.1 Workflow description
- Title
- Handle WhatsApp sales queries with GPT-4, Supabase, and a product catalog
- Workflow name
- Handle WhatsApp sales queries with GPT-4, Supabase, and a product catalog
How it works
An AI-powered sales agent on WhatsApp that handles product inquiries using your Supabase knowledge base and n8n catalog. Customers can send text, voice notes, or images to ask about products, pricing, and specs. The agent responds with detailed answers, product images, and FAQs, creating a complete self-service sales experience. (I primarily designed this for furniture business, consider tailoring it)
Setup steps
Connect Supabase credentials for your knowledge base and FAQs Configure n8n tables with your product catalog (prices, descriptions, image links) Set up WhatsApp Business API integration Add your product categories and common queries to the AI context Test with sample product questions and image uploads
Customization tips
Structure your catalog tables with clear columns (SKU, price, description, image_url) Add industry-specific terminology to the AI prompt Create templated responses for common FAQs to ensure consistency Enable voice-to-text transcription for better voice note handling Add product recommendation logic based on customer queries Set up image recognition for customers sending product photos to identify items
1.2 Logical Blocks
This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.
2. Block-by-Block Analysis
Block 2 - Sticky Note3
- Type / Role
- n8n-nodes-base.stickyNote - stickyNote
- Config choices
- Version 1
Block 3 - Knowledgebase
- Type / Role
- @n8n/n8n-nodes-langchain.vectorStoreSupabase - vectorStoreSupabase
- Config choices
- Version 1.3
Block 4 - Recursive Character Text Splitter
- Type / Role
- @n8n/n8n-nodes-langchain.textSplitterRecursiveCharacterTextSplitter - textSplitterRecursiveCharacterTextSplitter
- Config choices
- Version 1
Block 5 - Default Data Loader
- Type / Role
- @n8n/n8n-nodes-langchain.documentDefaultDataLoader - documentDefaultDataLoader
- Config choices
- Version 1.1
Block 6 - Supabase Vector Store
- Type / Role
- @n8n/n8n-nodes-langchain.vectorStoreSupabase - vectorStoreSupabase
- Config choices
- Version 1.3
Block 7 - Route Types
- Type / Role
- n8n-nodes-base.switch - switch
- Config choices
- Version 3.2
Block 8 - Download Image
- Type / Role
- n8n-nodes-base.httpRequest - httpRequest
- Config choices
- Version 4.2
Block 9 - Download Voicemail
- Type / Role
- n8n-nodes-base.httpRequest - httpRequest
- Config choices
- Version 4.2
Block 10 - Gets WhatsApp Image Source URL
- Type / Role
- n8n-nodes-base.whatsApp - whatsApp
- Config choices
- Version 1
Block 11 - Gets WhatsApp Voicemail Source URL
- Type / Role
- n8n-nodes-base.whatsApp - whatsApp
- Config choices
- Version 1
Block 12 - Map text prompt
- Type / Role
- n8n-nodes-base.set - set
- Config choices
- Version 3.4
Block 13 - Map image prompt
- Type / Role
- n8n-nodes-base.set - set
- Config choices
- Version 3.4
Block 14 - OpenAI1
- Type / Role
- @n8n/n8n-nodes-langchain.openAi - openAi
- Config choices
- Version 1.8
Block 15 - OpenAI
- Type / Role
- @n8n/n8n-nodes-langchain.openAi - openAi
- Config choices
- Version 1.8
Block 16 - WhatsApp Trigger
- Type / Role
- n8n-nodes-base.whatsAppTrigger - whatsAppTrigger
- Config choices
- Version 1
Block 17 - Web Search
- Type / Role
- @n8n/n8n-nodes-langchain.toolSerpApi - toolSerpApi
- Config choices
- Version 1
Block 18 - Sticky Note6
- Type / Role
- n8n-nodes-base.stickyNote - stickyNote
- Config choices
- Version 1
Block 19 - search_products_inventory
- Type / Role
- n8n-nodes-base.dataTableTool - dataTableTool
- Config choices
- Version 1.1
Block 20 - If
- Type / Role
- n8n-nodes-base.if - if
- Config choices
- Version 2.3
Block 21 - Send message1
- Type / Role
- n8n-nodes-base.whatsApp - whatsApp
- Config choices
- Version 1.1
Block 22 - On form submission1
- Type / Role
- n8n-nodes-base.formTrigger - formTrigger
- Config choices
- Version 2.4
Block 23 - Sticky Note2
- Type / Role
- n8n-nodes-base.stickyNote - stickyNote
- Config choices
- Version 1
Block 24 - Sticky Note
- Type / Role
- n8n-nodes-base.stickyNote - stickyNote
- Config choices
- Version 1
Showing the first 24 of 32 workflow blocks. Download the JSON for the full node graph.
3. Summary Table
| Workflow | Handle WhatsApp sales queries with GPT-4, Supabase, and a product catalog |
|---|---|
| Complexity | advanced |
| Nodes | 32 |
| Categories | Lead Nurturing, AI Chatbot |
| Author | Shadrack |
| Published | 04 Feb 2026 |
4. Reproducing the Workflow from Scratch
-
1. Download the workflow JSON
Use the JSON export at /data/workflows/13220/13220.json as the source template for this automation.
-
2. Import the template into n8n
Open n8n, import the downloaded JSON, and review each node before activating the workflow.
-
3. Configure credentials and variables
Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
-
4. Test with sample data
Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
-
5. Activate and monitor
Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.
5. General Notes & Resources
Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.
Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.
Frequently asked questions
What does Handle WhatsApp sales queries with GPT-4, Supabase, and a product catalog do?
How it works An AI powered sales agent on WhatsApp that handles product inquiries using your Supabase knowledge base and n8n catalog. Customers can send text, voice notes, or images to ask about pr...
What do I need before importing this workflow?
Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.
Can I customize this workflow?
Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Lead Nurturing, AI Chatbot use case.