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Deliver Invoices Where Your Customers Live

High-visibility PDF delivery and automated payment collection for Billing SaaS, Accounting Apps, and ERP solutions.

GST INVOICE
Inv #HK-9921 / 2026-04-05
Cloud Subscription₹4,999
API Maintenance₹1,500
Total Due₹6,499
Sent via WhatsApp

Native API for Financial SaaS

Ensure 0% no-shows on collections and 100% reach for digital receipts.

PDF Delivery

Directly attach GST invoices and receipts in the WhatsApp message. Official handles ensure PDFs are never marked as spam.

Payment Reminders

Trigger automated reminders 3 days, 1 day, and 1 hour before the due date. Increase collection rates by up to 60%.

Instant Receipts

Send a digital receipt as soon as a payment is reconciled in your system. Build trust with immediate confirmation.

Example: Sending an Invoice with PDF

// Standard POST request to deliver a template with dynamic PDF 
curl -X POST https://api.hkreach.in/api/external/send/template \
  -H "X-Api-Key: your_key" \
  -d '{
    "to": "917096136319",
    "templateName": "invoice_alert",
    "media": {
       "type": "document",
       "url": "https://your-server.com/invoices/INV-123.pdf",
       "filename": "Invoice_April_24.pdf"
    },
    "bodyParams": ["M/s Harikrishna Entreprise", "₹6,499"]
  }'

High-Performance Collection Cycles

Manual follow-ups are a thing of the past. Let our API handle the busy work of accounts receivable.

Bulk Payout Alerts

Process thousands of salary/payout notifications in a single batch via our async broadcasting API.

Interactive Buttons

Add "Pay Now" or "Download App" buttons directly to your billing messages for higher conversion.

Audit-Friendly Logs

Stay transparent with full delivery tracking for every single rupee billed.

917096136319 delivered at 14:02 PM
919876543210 read at 14:15 PM
910000000000 failed (Not on WhatsApp)