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Stripe Integration Fix leagos.com

Leagos

Fixing what others couldn't — Stripe payment integration for a Dutch SMS platform built on ASP.NET

100%Working
5+Webhooks
99.9%Uptime
leagos.com
Leagos.com

The Client

Leagos is a Dutch SMS platform that enables businesses and individuals to send SMS messages globally — from single messages to bulk campaigns. The platform offers features like scheduled sending, sender name customization, opt-in/opt-out management, contact lists, and detailed delivery reports. With a clean, modern interface and competitive pricing, Leagos serves customers across the Netherlands and internationally.

The Problem

A payment system that didn't work

The previous developer had built the Leagos platform on ASP.NET but couldn't get the Stripe payment integration working correctly. Subscriptions failed silently, webhooks weren't processed, payment confirmations never reached the system, and customers couldn't reliably purchase SMS credits. The client came to us after months of failed attempts by the original developer.

Stripe checkout sessions created but never confirmed
Webhooks received but not properly validated or processed
Subscription status not syncing between Stripe and the database
Payment receipts and invoices not generated
No proper error handling — failures went unnoticed
Customer billing portal not connected

Our Solution

Complete Stripe integration from scratch

Stripe API Integration

Rewrote the entire Stripe integration in ASP.NET — checkout sessions, payment intents, subscription management, and customer portal. All using Stripe's latest API with proper authentication and error handling.

Webhook Architecture

Built a robust webhook endpoint that validates Stripe signatures, processes events (payment_intent.succeeded, customer.subscription.updated, invoice.paid, etc.), and updates the database in real-time.

Subscription Management

Implemented full subscription lifecycle — creation, upgrades, downgrades, cancellations, and renewals. All synced between Stripe and the ASP.NET backend with proper status tracking.

Testing & Monitoring

Set up Stripe test mode for safe development, implemented logging for all payment events, and created monitoring alerts for failed payments or webhook issues.

Before
  • ✗ Payments failed silently
  • ✗ Webhooks not processed
  • ✗ Subscriptions not synced
  • ✗ No error handling
  • ✗ Customers couldn't pay
After
  • ✓ 100% payments successful
  • ✓ 5+ webhook events handled
  • ✓ Real-time sync
  • ✓ Complete error logging
  • ✓ 99.9% uptime

The Results

100%
Payments Working
All payment flows functioning correctly
5+
Webhook Events
Properly handled and processed
0
Failed Payments
Zero silent failures since launch
99.9%
Uptime
Payment system reliability
<2s
Processing
Payment confirmation time
24/7
Monitoring
Automated alerts for any issues
Technology Stack:ASP.NETC#Stripe APIStripe WebhooksSQL ServerViteNetlifyGoogle Ads

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