# Analyze Facebook comment sentiment with OpenAI and Slack: n8n workflow

> Started by a clock, and works across Google Sheets, Outlook and Slack. It puts OpenAI behind a retrieval step, so answers are drawn from documents you...

Source: https://millionrounds.com/workflow/analyze-facebook-comment-sentiment-with-openai-and-slack (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Research and reporting](https://millionrounds.com/workflows?category=Research+and+reporting#library)

# Analyze Facebook comment sentiment with OpenAI and Slack

Started by a clock, and works across Google Sheets, Outlook and Slack. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 15 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: OpenAI Retrieval

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fanalyze-facebook-comment-sentiment-with-openai-and-slack)

**15 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**3** Services it connects to

## The flow

Starts it 2 Model 4 Logic 4 Service 5

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

- 1 **Error Handler Trigger** Error trigger *Starts it*
- 2 **LLM - OpenAI GPT-4 Model** Lm Chat Open Ai *Model*
- 3 **Memory Buffer - Session Context** Memory Buffer Window *Model*
- 4 **Structured JSON Parser** Output Parser Structured *Model*
- 5 **Trigger - Daily Sentiment Analysis** Schedule trigger *Starts it*
- 6 **Slack: Send Error Alert** Slack *Service*
- 7 **💬 Agent - Sentiment & Tone Evaluator** Agent *Model*
- 8 **Fetch Recent Facebook Posts** Facebook Graph Api *Service*
- 9 **Route Based on Sentiment Score** Switch *Logic*
- 10 **Format Facebook Data (Code Node)** Code *Logic*
- 11 **Slack Alert - Negative Sentiment** Slack *Service*
- 12 **Prepare Data for Google Sheets** Code *Logic*
- 13 **Format HTML Email Report (Code Node)** Code *Logic*
- 14 **Update Google Sheet - Sentiment Log** Google Sheets *Service*
- 15 **Send Sentiment Report (Outlook)** Microsoft Outlook *Service*

## How it's built

- **Starts on:** A clock
- **Steps:** 15, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Google Sheets, Outlook, Slack
- **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 Google Sheets, Outlook and Slack accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on a clock.

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. 15 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 15 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%2Fanalyze-facebook-comment-sentiment-with-openai-and-slack)
- **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.

[Google Sheets](https://millionrounds.com/workflows?service=Google+Sheets#library)[Outlook](https://millionrounds.com/workflows?service=Outlook#library)[Slack](https://millionrounds.com/workflows?service=Slack#library)

## Workflows like it

Also research and reporting, with the same services where possible, closest in size first.

- [**AI-powered RAG workflow for stock earnings report analysis** 15 steps · calls a model · Google Docs, Google Drive](https://millionrounds.com/workflow/ai-powered-rag-workflow-for-stock-earnings-report-analysis)
- [**Analyze YouTube comments sentiment & keywords with Gemini** 15 steps · calls a model · Google Sheets, Telegram](https://millionrounds.com/workflow/analyze-youtube-comments-sentiment-and-keywords-with-gemini)
- [**Analyze brand competitors with Decodo and Gemini** 15 steps · calls a model · Google Sheets, Telegram](https://millionrounds.com/workflow/analyze-brand-competitors-with-decodo-and-gemini)
- [**Analyze competitor Instagram engagement with Bright Data** 15 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/analyze-competitor-instagram-engagement-with-bright-data)
- [**And extract reports from websites with OpenAI** 15 steps · calls a model · Google Sheets](https://millionrounds.com/workflow/and-extract-reports-from-websites-with-openai)
- [**Auto-fix ClickUp bug reports with OpenAI and Cursor** 15 steps · calls a model · ClickUp, GitHub](https://millionrounds.com/workflow/auto-fix-clickup-bug-reports-with-openai-and-cursor)