# Build website Q&A chatbot with OpenAI and Supabase Vector DB: n8n workflow

> Started by someone opening a chat with it, and works across Supabase vectors. It puts OpenAI behind a retrieval step, so answers are drawn from documents...

Source: https://millionrounds.com/workflow/build-website-q-and-a-chatbot-with-openai-and-supabase-vecto (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [AI assistants](https://millionrounds.com/workflows?category=AI+assistants#library)

# Build website Q&A chatbot with OpenAI and Supabase Vector DB

Started by someone opening a chat with it, and works across Supabase vectors. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 14 steps: a working afternoon to understand properly.

Medium Calls a model: OpenAI Retrieval

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fbuild-website-q-and-a-chatbot-with-openai-and-supabase-vecto)

**14 steps** Medium: a working afternoon

**0** Branches: places the flow splits

**0** Loops or waits

**1** Service it connects to

## The flow

Starts it 2 Model 9 Service 3

The steps in the order they run, from what starts it.

- 1 **When chat message received** Chat trigger *Starts it*
- 2 **Recursive Character Text Splitter** Text Splitter Recursive Character Text Splitter *Model*
- 3 **Enter Website Url** Form trigger *Starts it*
- 4 **Embeddings Cohere** Embeddings Cohere *Model*
- 5 **Embeddings With Cohere** Embeddings Cohere *Model*
- 6 **Chat Memory** Memory Postgres Chat *Model*
- 7 **OpenAI Chat Modell** Lm Chat Open Ai *Model*
- 8 **Question & Answer Retrieve** Agent *Model*
- 9 **Default Data Loader** Document Default Data Loader *Model*
- 10 **Website Data Scrapping** Http Request *Service*
- 11 **Supabase Vector Store** Vector Store Supabase *Model*
- 12 **Data From Supabase Vector Store** Vector Store Supabase *Model*
- 13 **HTML Extract** Html Extract *Service*
- 14 **Convert to File** Convert To File *Service*

## How it's built

- **Starts on:** Someone opening a chat with it
- **Steps:** 14
- **Size:** Medium: a working afternoon
- **Connects to:** Supabase vectors
- **Model:** OpenAI
- **Retrieval:** Answers are drawn from documents you supply, not from the model alone

## Questions

What does it need to run?

An n8n account, plus your own Supabase vectors account, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on someone opening a chat with it.

Does it use AI?

Yes. It calls OpenAI. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 14 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 14 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fbuild-website-q-and-a-chatbot-with-openai-and-supabase-vecto)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Supabase vectors](https://millionrounds.com/workflows?service=Supabase+vectors#library)

## Workflows like it

Also ai assistants, with the same services where possible, closest in size first.

- [**Answer voice queries from a webhook over Google Drive docs** 15 steps · calls a model · Google Drive, Supabase vectors](https://millionrounds.com/workflow/answer-voice-queries-from-a-webhook-over-google-drive-docs)
- [**Create RAG-ready knowledge bases from websites with Apify** 13 steps · calls a model · Supabase vectors](https://millionrounds.com/workflow/create-rag-ready-knowledge-bases-from-websites-with-apify)
- [**Build a Placetel RAG voice assistant with Google Drive** 16 steps · calls a model · Google Drive, Supabase vectors](https://millionrounds.com/workflow/build-a-placetel-rag-voice-assistant-with-google-drive)
- [**Build a RAG chatbot with Gemini and Supabase** 16 steps · calls a model · Supabase vectors](https://millionrounds.com/workflow/build-a-rag-chatbot-with-gemini-and-supabase)
- [**Build a RAG-powered AI assistant with OpenAI and Google Drive** 12 steps · calls a model · Google Drive, Supabase vectors](https://millionrounds.com/workflow/build-a-rag-powered-ai-assistant-with-openai-and-google-driv)
- [**Build a multi-knowledge base RAG chat assistant with Supabase** 12 steps · calls a model · Supabase vectors](https://millionrounds.com/workflow/build-a-multi-knowledge-base-rag-chat-assistant-with-supabas)