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n8n Automation

Fair-Code / Open Workflows

Build end-to-end automated billing pipelines, WhatsApp triggers, and ERP syncing

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Pre-Built n8n Automation Recipes

Copy production-ready workflow JSON definitions directly into your n8n canvas

{
  "name": "GST Maker Invoice to WhatsApp Automation",
  "nodes": [
    {
      "name": "Webhook Trigger",
      "type": "n8n-nodes-base.webhook",
      "parameters": { "path": "gst-invoice-created", "httpMethod": "POST" }
    },
    {
      "name": "Format WhatsApp Message",
      "type": "n8n-nodes-base.code",
      "parameters": { "jsCode": "return { json: { text: `Hello ${$json.customer_name}, your invoice #${$json.invoice_number} for Rs. ${$json.total_amount} is ready. Download here: ${$json.pdf_url}` } };" }
    },
    {
      "name": "Send WhatsApp via UltraMsg / Twilio",
      "type": "n8n-nodes-base.httpRequest",
      "parameters": { "url": "https://api.whatsapp-gateway.com/send", "method": "POST" }
    }
  ]
}
{
  "name": "Daily Bank Statement to GST Reconciliation",
  "nodes": [
    {
      "name": "Schedule Daily 9 AM",
      "type": "n8n-nodes-base.cron",
      "parameters": { "triggerTimes": [{ "hour": 9, "minute": 0 }] }
    },
    {
      "name": "Fetch GST Maker Unpaid Invoices",
      "type": "n8n-nodes-base.httpRequest",
      "parameters": { "url": "https://api.gstmaker.com/invoices?status=unpaid", "method": "GET" }
    },
    {
      "name": "Match IMPS / UPI Transactions",
      "type": "n8n-nodes-base.code",
      "parameters": { "jsCode": "// Reconciliation logic matching transaction reference UTR with customer invoices" }
    }
  ]
}
Open n8n Canvas ↗

How to Use n8n with GST Maker

Connect APIs and automate billing tasks

  1. 1
    Deploy n8n (Cloud or Self-Hosted Docker) Run n8n locally with Docker or sign up for n8n Cloud for instant serverless execution.
  2. 2
    Create Webhook Node for Invoices Configure an HTTP Request node to call GST Maker's invoice generation or validation endpoints.
  3. 3
    Connect CRM, WhatsApp, or Google Drive Pipe generated invoice PDFs directly into Google Drive backups and send client WhatsApp alerts.
  4. 4
    Call GST Maker MCP Tools (AI Agents) Use n8n's LangChain AI Agent nodes to call GST Maker MCP tools for autonomous tax calculations.

Pro Tips for Automated Billing

Reliable execution without downtime

  • Implement Retry on Rate Limits Set n8n HTTP nodes to retry with exponential backoff on HTTP 429 status to handle API rate limiting smoothly.
  • Store PDF Buffers in S3 or Cloudflare R2 Archive generated invoice PDFs in inexpensive object storage to maintain statutory 6-year GST audit backups.
  • Set Up WhatsApp Error Alerts Add an 'Error Trigger' node in n8n so you receive an instant alert if a payment webhook fails to record.
  • Automate GSTR-1 Verification Trigger an n8n workflow on the 10th of every month to verify all outgoing B2B invoices have valid buyer GSTINs.

Read the Full n8n Workflow Guide

Step-by-step documentation on integrating n8n with GST Maker's MCP server and REST endpoints.

View n8n Workflow Guide →