# AI knowledge base search & response system with OpenAI: n8n workflow

> Started by another system calling it, and works across Supabase. 9 steps: a working afternoon to understand properly.

Source: https://millionrounds.com/workflow/ai-knowledge-base-search-and-response-system-with-openai (Millionrounds; every figure on the page links to its filing or article)

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

# AI knowledge base search & response system with OpenAI

Started by another system calling it, and works across Supabase. 9 steps: a working afternoon to understand properly.

Medium

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fai-knowledge-base-search-and-response-system-with-openai)

**9 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 Logic 5 Service 2

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

- 1 **Webhook Trigger - KB Search Request** Webhook *Starts it*
- 2 **Validate & Sanitize Input** Code *Logic*
- 3 **Detect Query Intent & Classification** Code *Logic*
- 4 **Prepare OpenAI Synthesis Request** Code *Logic*
- 5 **Call OpenAI for Synthesis** Http Request *Service*
- 6 **Assess Response Quality & Confidence** Code *Logic*
- 7 **Save to KB Interactions Log** Supabase *Service*
- 8 **Format Final Response** Code *Logic*
- 9 **Return Response to User** Respond To Webhook *Starts it*

## How it's built

- **Starts on:** Another system calling it
- **Steps:** 9
- **Size:** Medium: a working afternoon
- **Connects to:** Supabase
- **Model:** None. This is plumbing, not judgement

## Questions

What does it need to run?

An n8n account, plus your own Supabase account. You connect your own accounts after importing it; none are included.

What starts it?

It starts on another system calling it.

Does it use AI?

No. Every step is fixed logic or a call to a service, so it does the same thing every time.

How long does it take to set up?

Plan an afternoon. 9 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 9 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%2Fai-knowledge-base-search-and-response-system-with-openai)
- **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](https://millionrounds.com/workflows?service=Supabase#library)

## Workflows like it

Also data collection, with the same services where possible, closest in size first.

- [**Synchronizes data between Google Sheets and Supabase** 9 steps · Google Sheets, Supabase](https://millionrounds.com/workflow/synchronizes-data-between-google-sheets-and-supabase)
- [**A/B test AI prompts with Supabase and Langchain Agent** 9 steps · calls a model · Supabase](https://millionrounds.com/workflow/a-b-test-ai-prompts-with-supabase-and-langchain-agent)
- [**Split test different agent prompts with Supabase and OpenAI** 9 steps · calls a model · Supabase](https://millionrounds.com/workflow/split-test-different-agent-prompts-with-supabase-and-openai)
- [**Collect astrology feedback with Telegram and Supabase** 10 steps · Supabase, Telegram](https://millionrounds.com/workflow/collect-astrology-feedback-with-telegram-and-supabase)
- [**Send re-engagement emails to inactive users with Supabase** 8 steps · Email, Supabase](https://millionrounds.com/workflow/send-re-engagement-emails-to-inactive-users-with-supabase)
- [**Extract email tasks with Gmail and OpenAI** 8 steps · calls a model · Gmail, Supabase](https://millionrounds.com/workflow/extract-email-tasks-with-gmail-and-openai)