Event Ticketing Backend: Auto QR Tickets with Google Sheets & Gmail — n8n Workflow

High complexity🔗 Webhook27 nodes🏷️ Miscellaneousby Khairul Muhtadin

Overview

Ticketing Backend automates registration, QR-ticket generation, email delivery, and check-in validation using Google Sheets, Gmail, and a webhook scanner — reducing manual ticket prep from ~3 hours to under 5 minutes for 200 attendees.

Why Use This Workflow?

Time Savings:** Automates ticket generation & delivery. reduces manual processing for 200 attendees from ~3 hours to <5 minutes. Cost Reduction:** Removes dependency on paid ticketing platforms for basic events — save up to $150–$300/mo

Nodes used

Google SheetsHTTP RequestGmailCode

Workflow Preview

Ticket Generator & Sender
Event Ticketing System - Complete Flow
This workflow manages the full lifecycle of event ticke
1. Registration - Accepts participant registration via
2. Ticket Generation - Aut
Setup Required
You need these credentials configured:
1. Google Sheets OAuth2
- Used for reading/writing registration & ticket dat
- Connect your Google account in n8n credentials
2.
How Ticket Scanner Works
Endpoint: POST `/v1/scanner`
Flow:
1. Receives scanned QR data
2. Parses ticket_id from barcode JSON
3. Looks up ticket in Google Sheets
Registration Endpoint
Endpoint: POST `/v1/register`
Expected Input:
```json
{
"nama": "string",
Automatic Ticket Generation
Trigger: Runs every 1 minute
What it does:
1. Finds paid registrations where Email Sent = NO
2. Generates unique ticket IDs for each ticket
3. Creates QR codes
Get Tickets
Parse Barcode
T
Ticket Available?
Parse Output
⚡
A
Already Checked IN
⚡
C
Checked IN
Update Ticket Status
⚡
S
SCAN TICKET
E
Email exist?
Get Participant
Validate Input
⚡
V
Validation Error
V
Valid Input?
⚡
A
Already Registered
⚡
T
Tiket Booked
Store Data
⚡
R
REGISTER
Get Rows
F
Filter Paid Not Sent
Generate Ticket Data
Generate QR Code
Build HTML Email
Send Email (Gmail)
Update Sheet (Register)
Update Sheet (Tickets)
⚡
S
START
Parse Data
27 nodes24 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a webhook trigger.

  2. 2

    Process

    Data flows through 27 nodes, connecting code, filter, gmail.

  3. 3

    Output

    The workflow completes its automation and delivers the result to the configured destination.

Node Details (27)

GO

Google Sheets

googleSheets

#1
HT

HTTP Request

httpRequest

#2
GM

Gmail

gmail

#3
CO

Code

code

#4

How to Import This Workflow

  1. 1Click Download JSON button on the right to save the workflow file.
  2. 2Open your n8n instance. Go to Workflows → New → Import from file.
  3. 3Select the downloaded event-ticketing-backend-auto-qr-tickets-with-google-sheets-gmail file and click Import.
  4. 4Set up credentials for each service node (API keys, OAuth, etc.).
  5. 5Click Test Workflow to verify everything works, then activate it.

Or paste directly in n8n → Import from JSON:

{ "name": "Event Ticketing Backend: Auto QR Tickets with Google Sheets & Gmail", "nodes": [...], ...}

Integrations

codefiltergmailgooglesheetshttprequestifrespondtowebhookscheduletriggerwebhook

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes27
Complexityhigh
Triggerwebhook
CategoryMiscellaneous

Created by

Khairul Muhtadin

Khairul Muhtadin

@khmuhtadin

Tags

codefiltergmailgooglesheetshttprequestifrespondtowebhookscheduletriggerwebhook
⚡

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