Overview
A middleware hub connecting to 7 of the world's leading virtual SIM providers, aggregating and automating on-demand phone number rentals for receiving SMS verification codes. The platform fully automates the rental lifecycle, SMS polling, online wallet top-ups, and user account management.
Key Features
For End Users
- Multi-Source Inventory: Unified access to 7 global SIM networks:
- SMS-Man
- 5sim.net
- VIOTP
- United SMS
- TextVerified
- PhoneBlur
- 2ndline.io
- Flexible Payments:
- Instant wallet top-ups via banking and e-wallets.
- Promotional discount coupon engine.
- Automatic balance refund when a number fails to receive SMS within the timeout.
- Rental Capabilities:
- Filter by country, carrier, and target service (Telegram, Google, WhatsApp, etc.).
- Real-time SMS status tracking over WebSockets.
- Comprehensive transaction and rental history.
- Option to extend timeout intervals.
For Administrators
- User & Balance Management: Detailed customer transaction logs, access control, account freezing, and wallet adjustments.
- Financial Analytics: Real-time revenue telemetry, historical growth charts, and one-click Excel/PDF report export.
- System Configuration: Dynamic markup percentages, provider prioritization, API key management, and automated alert webhooks.
Technical Implementation
- Frontend: Next.js with TypeScript, Tailwind CSS, WebSockets for live status updates, SEO-optimized landing architecture.
- Backend: NestJS modular REST API, PostgreSQL relational database, Redis for session caching and rate limits, BullMQ for distributed background workers.
- Integration Layer: Custom adapter pattern for each upstream provider, exponential backoff retries, fault tolerance, and load balancing.
- Observability: Winston logging, Sentry error monitoring, and Prometheus/Grafana operational dashboards.