# Transcribe WhatsApp voice notes and auto-reply: n8n workflow

> Started by another system calling it. It calls services over plain HTTP rather than through connectors. It hands the judgement calls to OpenAI.

Source: https://millionrounds.com/workflow/transcribe-whatsapp-voice-notes-and-auto-reply (Millionrounds; every figure on the page links to its filing or article)

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

# Transcribe WhatsApp voice notes and auto-reply

Started by another system calling it. It calls services over plain HTTP rather than through connectors. It hands the judgement calls to OpenAI. 17 steps, 3 branches: a working afternoon to understand properly.

Medium Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Ftranscribe-whatsapp-voice-notes-and-auto-reply)

**17 steps** Medium: a working afternoon

**3** Branches: places the flow splits

**0** Loops or waits

**0** Services by connector: it calls them over plain HTTP

## The flow

Starts it 6 Model 2 Logic 6 Service 3

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

- 1 **Verify Webhook Trigger** Webhook *Starts it*
- 2 **Message Webhook Trigger** Webhook *Starts it*
- 3 **If Token Valid** If *Logic*
- 4 **Extract Message Content** Code *Logic*
- 5 **Respond Verified** Respond To Webhook *Starts it*
- 6 **Respond Verify Failed** Respond To Webhook *Starts it*
- 7 **If Real Message** If *Logic*
- 8 **Determine Message Type** If *Logic*
- 9 **Acknowledge Message** Respond To Webhook *Starts it*
- 10 **Fetch Audio Download URL** Http Request *Service*
- 11 **Set Text Prompt** Set *Logic*
- 12 **Download Audio Track** Http Request *Service*
- 13 **Create AI Reply** Open Ai *Model*
- 14 **Whisper Transcription** Open Ai *Model*
- 15 **Post WhatsApp Reply** Http Request *Service*
- 16 **Set Audio Prompt** Set *Logic*
- 17 **Respond OK** Respond To Webhook *Starts it*

## How it's built

- **Starts on:** Another system calling it
- **Steps:** 17, with 3 branches
- **Size:** Medium: a working afternoon
- **Connects to:** Nothing by connector; it calls services over plain HTTP
- **Model:** OpenAI

## Questions

What does it need to run?

An n8n account, and a key for OpenAI. 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?

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

How long does it take to set up?

Plan an afternoon. 17 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 17 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%2Ftranscribe-whatsapp-voice-notes-and-auto-reply)
- **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.

## Workflows like it

Also documents and files, with the same services where possible, closest in size first.

- [**AI-powered Product Hunt data collection & translation** 17 steps · calls a model · Google Sheets](https://millionrounds.com/workflow/ai-powered-product-hunt-data-collection-and-translation)
- [**Aggregate & update documentation from Slack, Teams & GitHub** 17 steps · calls a model · GitHub, Gmail](https://millionrounds.com/workflow/aggregate-and-update-documentation-from-slack-teams-and-gith)
- [**Analyze Instagram profiles with Apify and Gemini** 17 steps · calls a model · Apify, Supabase](https://millionrounds.com/workflow/analyze-instagram-profiles-with-apify-and-gemini-2)
- [**Analyze Instagram profiles with Apify and Gemini** 17 steps · calls a model · Apify, Supabase](https://millionrounds.com/workflow/analyze-instagram-profiles-with-apify-and-gemini)
- [**Automated document compliance validation with a local model** 17 steps · calls a model · Qdrant](https://millionrounds.com/workflow/automated-document-compliance-validation-with-a-local-model)
- [**Classify Ivanti Neurons ITSM incidents with OpenAI** 17 steps · calls a model](https://millionrounds.com/workflow/classify-ivanti-neurons-itsm-incidents-with-openai)