# WhatsApp BOT for AI caption & hashtag generator with OpenAI: n8n workflow

> Started by an incoming WhatsApp message, and works across Google Sheets and WhatsApp. It hands the judgement calls to OpenAI.

Source: https://millionrounds.com/workflow/whatsapp-bot-for-ai-caption-and-hashtag-generator-with-opena (Millionrounds; every figure on the page links to its filing or article)

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

# WhatsApp BOT for AI caption & hashtag generator with OpenAI

Started by an incoming WhatsApp message, and works across Google Sheets and WhatsApp. It hands the judgement calls to OpenAI. 21 steps, 2 branches, 1 loop or waits: large, and worth reading before you trust it with anything live.

Large Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fwhatsapp-bot-for-ai-caption-and-hashtag-generator-with-opena)

**21 steps** Large: read it before trusting it with anything live

**2** Branches: places the flow splits

**1** Loop or waits

**2** Services it connects to

## The flow

Starts it 1 Model 7 Logic 4 Service 9

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

- 1 **OpenAI Chat Model** Lm Chat Open Ai *Model*
- 2 **WhatsApp Trigger1** Whats App trigger *Starts it*
- 3 **OpenAI Chat Model1** Lm Chat Open Ai *Model*
- 4 **Structured Output Parser** Output Parser Structured *Model*
- 5 **Structured Output Parser1** Output Parser Structured *Model*
- 6 **caption, hashtag generator** Agent *Model*
- 7 **Check Input Type** Switch *Logic*
- 8 **Video caption, hashtag music generator** Agent *Model*
- 9 **Updata log in Sheet** Google Sheets *Service*
- 10 **Get Video URL** Whats App *Service*
- 11 **Get Image URL** Whats App *Service*
- 12 **Send message** Whats App *Service*
- 13 **Download video** Http Request *Service*
- 14 **Download Image** Http Request *Service*
- 15 **Upload video Gemini** Http Request *Service*
- 16 **Analyze Image** Open Ai *Model*
- 17 **Set file name** Set *Logic*
- 18 **Check video status** Http Request *Service*
- 19 **Is state ACTIVE?** If *Logic*
- 20 **Analyze video Gemini** Http Request *Service*
- 21 **Wait** Wait *Logic*

## How it's built

- **Starts on:** An incoming WhatsApp message
- **Steps:** 21, with 2 branches, 1 loop or waits
- **Size:** Large: read it before trusting it with anything live
- **Connects to:** Google Sheets, WhatsApp
- **Model:** OpenAI

## Questions

What does it need to run?

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

What starts it?

It starts on an incoming WhatsApp message.

Does it use AI?

Yes. It calls OpenAI. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Take your time. At 21 steps it is large: read it before trusting it with anything live.

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 21 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%2Fwhatsapp-bot-for-ai-caption-and-hashtag-generator-with-opena)
- **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)[WhatsApp](https://millionrounds.com/workflows?service=WhatsApp#library)

## Workflows like it

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

- [**AI agent for LinkedIn post with OpenAI and Google Sheets** 21 steps · calls a model · Google Sheets, LinkedIn](https://millionrounds.com/workflow/ai-agent-for-linkedin-post-with-openai-and-google-sheets)
- [**AI-powered content analysis with Decodo and OpenAI** 21 steps · calls a model · Gmail, Google Docs](https://millionrounds.com/workflow/ai-powered-content-analysis-with-decodo-and-openai)
- [**Analyze YouTube videos with OpenAI** 21 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/analyze-youtube-videos-with-openai)
- [**Automate AI video creation & multi-platform publishing** 21 steps · calls a model · Google Drive, Google Sheets](https://millionrounds.com/workflow/automate-ai-video-creation-and-multi-platform-publishing)
- [**Classify and summarize WeChat articles with OpenAI and Notion** 21 steps · calls a model · Google Sheets, Notion](https://millionrounds.com/workflow/classify-and-summarize-wechat-articles-with-openai-and-notio)
- [**Create AI newsletters from YouTube with LangChain and Gemini** 21 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/create-ai-newsletters-from-youtube-with-langchain-and-gemini)