Automate Xero invoices and payments using webhooks, PostgreSQL and WhatsApp

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1. Workflow Overview

This workflow automates the full invoicing and payment process using n8n and Xero. It allows businesses to generate invoices, track payments, send WhatsApp notifications, and keep records synced au...

Best for

Invoice Processing automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.webhook, n8n-nodes-base.xero, n8n-nodes-base.if, n8n-nodes-base.googlecalendar, n8n-nodes-base.twilio, n8n-nodes-base.respondtowebhook, n8n-nodes-base.stickynote, n8n-nodes-base.postgres

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Gilbert Onyebuchi.

Original n8n.io source

1.1 Workflow description

Title: Automate Xero invoices and payments using webhooks, PostgreSQL and WhatsApp
Workflow name: Automate Xero invoices and payments using webhooks, PostgreSQL and WhatsApp

It’s designed to plug into your existing tools and scale as your operations grow.

How It Works

A webhook receives invoice or payment data from your app, form, or system
Xero automatically creates or updates the invoice
Payments are tracked and verified in real time
Clients receive WhatsApp notifications for invoices, reminders, or payments
All records are logged in a database and synced to Google Calendar and Google Sheets
Automated responses confirm successful actions or errors

Everything runs in the background once connected.

Setup

Connect your Xero account to n8n
Set up a database (PostgreSQL via Supabase) for logging invoices and payments
Connect Google Calendar for scheduling and tracking
Connect Twilio WhatsApp for client notifications
Point your system or payment source to the provided webhook URL
No complex coding required. I guide you through the setup and ensure everything is tested.

Need Help or Customization?

If you’d like this workflow customized for your business or want help setting it up properly, feel free to reach out.

🔗 Connect with me on LinkedIn: 👉 Click here to connect

I’m happy to walk you through it or adapt it to your specific use case.

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Webhook Trigger - Invoice Created

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 1.1

Block 2 - Webhook - Payment Received

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 1.1

Block 3 - Xero - Create Invoice

Type / Role: n8n-nodes-base.xero - xero
Config choices: Version 1

Block 4 - IF - Invoice Created Successfully

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2

Block 5 - Google Calendar - Create Due Date Event

Type / Role: n8n-nodes-base.googleCalendar - googleCalendar
Config choices: Version 1.2

Block 6 - WhatsApp - Send Invoice Confirmation

Type / Role: n8n-nodes-base.twilio - twilio
Config choices: Version 1

Block 7 - Respond to Webhook - Success

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1

Block 8 - Respond to Webhook - Error

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1

Block 9 - Google Calendar - Remove Due Date Event

Type / Role: n8n-nodes-base.googleCalendar - googleCalendar
Config choices: Version 1.2

Block 10 - Respond to Webhook - Payment

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1

Block 11 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 12 - Xero - Update Invoice to Paid1

Type / Role: n8n-nodes-base.xero - xero
Config choices: Version 1

Block 13 - WhatsApp - Send Invoice Confirmation1

Type / Role: n8n-nodes-base.twilio - twilio
Config choices: Version 1

Block 14 - Add Invoice Record

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.4

Block 15 - PostgreSQL - Update Payment Status

Type / Role: n8n-nodes-base.postgres - postgres
Config choices: Version 2.4

Block 16 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 17 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Automate Xero invoices and payments using webhooks, PostgreSQL and WhatsApp
Complexity	advanced
Nodes	17
Categories	Invoice Processing
Author	Gilbert Onyebuchi
Published	13 Jan 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/12695/12695.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Invoice Processing workflows

Frequently asked questions

What does Automate Xero invoices and payments using webhooks, PostgreSQL and WhatsApp do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Invoice Processing use case.

Gilbert Onyebuchi

12 workflows

Nodes

n8n-nodes-base.webhook n8n-nodes-base.xero n8n-nodes-base.if n8n-nodes-base.googlecalendar n8n-nodes-base.twilio n8n-nodes-base.respondtowebhook n8n-nodes-base.stickynote n8n-nodes-base.postgres

Complexity

advanced

Published 13 Jan 2026

Likes 0

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Install path: /data/workflows/12695/12695.json

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Automate Xero invoices and payments using webhooks, PostgreSQL and WhatsApp

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Webhook Trigger - Invoice Created

Block 2 - Webhook - Payment Received

Block 3 - Xero - Create Invoice

Block 4 - IF - Invoice Created Successfully

Block 5 - Google Calendar - Create Due Date Event

Block 6 - WhatsApp - Send Invoice Confirmation

Block 7 - Respond to Webhook - Success

Block 8 - Respond to Webhook - Error

Block 9 - Google Calendar - Remove Due Date Event

Block 10 - Respond to Webhook - Payment

Block 11 - Sticky Note

Block 12 - Xero - Update Invoice to Paid1

Block 13 - WhatsApp - Send Invoice Confirmation1

Block 14 - Add Invoice Record

Block 15 - PostgreSQL - Update Payment Status

Block 16 - Sticky Note1

Block 17 - Sticky Note2

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions