Turn meeting transcripts or audio into Google Docs action summaries with Groq Whisper, OpenRouter, and Google Docs

Description

Meeting Transcript → AI Summary & Google Doc (Text + Audio)

Turn raw meeting transcripts or audio recordings into structured,
ready-to-share Google Docs — automatically. No manual note-taking,
no copy-pasting.

What It Does

Send a meeting transcript (text or audio file) via a webhook and this
workflow will:

Auto-detect whether you sent text or an audio file
Transcribe audio using Groq Whisper (free — 28,800 sec/day)
Use AI to extract a structured summary via OpenRouter
Create a formatted Google Doc with 4 clearly defined sections:
📌 Executive Summary (2–3 sentences)
✅ Key Decisions Made
📋 Action Items (with Owner & Deadline)
🗓️ Suggested Next Meeting Agenda
Return the Google Doc link instantly in the webhook response

Who Is This For

Teams and managers who want automatic meeting notes without extra tools
Anyone recording calls or meetings who needs structured follow-ups fast
Operations and project managers tracking decisions and action items

How It Works

Trigger — Send a POST request to the webhook with either:
JSON body: transcript, meeting_title, meeting_date
Multipart form-data: audio file (.mp3, .mp4, .wav, .m4a)
Route — An If node detects whether text or audio was sent
Transcribe (audio path only) — Groq Whisper transcribes the audio
Summarize — OpenRouter AI (GPT-4o-mini) structures content into JSON
Format — A Code node builds the final document content
Publish — A Google Doc is created and the summary is written into it
Respond — Webhook returns the doc title, URL, and summary preview

Requirements

| Service | Purpose | Cost |
|---|---|---|
| Groq | Audio transcription (Whisper) | Free (28,800 sec/day) |
| OpenRouter | AI summarization | Free models available |
| Google Docs OAuth2 | Create & write documents | Free |

Setup Steps

Groq Credential
Get a free API key at console.groq.com
In n8n → Settings → Credentials → New → Header Auth
Set Name: Authorization, Value: Bearer YOUR_GROQ_KEY
Select this credential in the Transcribe Audio node

OpenRouter Credential
Get a free API key at openrouter.ai
In n8n → Settings → Credentials → New → Header Auth
Set Name: Authorization, Value: Bearer YOUR_OPENROUTER_KEY
Select this credential in the Call AI API node

Google Docs
In n8n → Settings → Credentials → New → Google Docs OAuth2
Sign in and allow access
Select this credential in both Google Docs nodes

Activate the workflow and copy the webhook URL from the trigger node

Example Request (Text)

POST to your webhook URL with:
{
"transcript": "John: Let's move the launch to Q3...",
"meeting_title": "Q2 Planning Sync",
"meeting_date": "2025-05-05"
}

Example Request (Audio)

POST with multipart/form-data:
audio → your audio file (.mp3, .mp4, .wav, .m4a)
meeting_title → optional
meeting_date → optional