Blog
All articles. All pillars. All authors.
Session 4: CLI Tool, Hosted Checkout, and API Documentation
How we built the zerofee-cli, hosted checkout pages, and 5 API documentation files in one session. Session 004 deep dive. By Juste A. Gnimavo and Claude.
PayPal Integration: Orders API and Redirect Flow
How 0fee.dev integrates PayPal Orders API v2 for global wallet payments with redirect flow, capture on return, and webhook handling.
One Command to Deploy: How We Built sh0 push
How we built sh0 push -- a single command that detects your stack, packages files, uploads, builds, and returns a live URL in under 40 seconds.
Internationalization: 15 Backend Languages, 5 Frontend
How 0fee.dev implements 15 backend languages and 5 frontend languages with SolidJS Context API, RTL Arabic, and 1,350+ keys.
The 0.99% Fee Model: Zero Monthly Fees
How 0fee.dev pricing works: 0.99% per transaction, zero subscriptions, monthly invoicing, multi-currency conversion. By Juste A. Gnimavo and Claude.
The Billing Suspension System
How 0fee.dev handles unpaid invoices: cron-based billing, grace periods, 402 responses, auto-reactivation. By Juste A. Gnimavo and Claude.
The Intelligent Payment Routing Engine
How 0fee.dev routes payments across 117 methods and 53+ providers using priority-based selection with automatic fallback. By Juste A. Gnimavo and Claude.
The Checkout Widget: 21KB IIFE That Handles Everything
How we built 0fee.dev's 21KB checkout widget as a Vite IIFE library build with country selection, OTP support, and phone input.
Hosted Checkout Pages: The Redirect Flow
How 0fee.dev built server-rendered hosted checkout pages with Jinja2, multi-language support, dark mode, and sandbox mode.
Currency Conversion Across 25+ Currencies
How 0fee.dev handles currency conversion across 25+ currencies with free APIs, caching, and locale detection. By Juste A. Gnimavo and Claude.
SQLAdmin Migration: From SolidJS Admin to Integrated Backend
How we migrated the 0fee.dev admin panel from a custom SolidJS frontend to SQLAdmin with 16 models and 12 views. By Juste A. Gnimavo.
Seven SDKs in Seven Languages
How we built 7 SDKs for 0fee.dev in TypeScript, Python, Go, Ruby, PHP, Java, and C# across two sessions. By Juste A. Gnimavo and Claude.