0fee
The payment API built for Africa
Payment orchestration supporting 150+ providers across Africa. MTN MoMo, Orange Money, Wave, M-Pesa, Stripe, PayPal. Unified API, unified webhooks, AI smart routing. Fixed 0.99% fee.
Building 0fee
Building 8 SDKs With Zero Human Engineers
How we built 8 SDKs in 7 languages plus 3 platform plugins for 0fee.dev with zero human engineers. By Juste A. Gnimavo and Claude.
The Pricing Evolution: From Tiers to 0.99%
How 0fee.dev's pricing evolved from 3 tiers to a flat 0.99% fee with no monthly charges and infinite credit. By Juste A. Gnimavo.
Lessons From Building a Fintech Platform With AI
What worked, what was hard, and what surprised us building 0fee.dev as a CEO-AI CTO team. Advice for AI-assisted fintech. By Juste A. Gnimavo.
The Numbers: 86 Sessions, 70,000+ Lines of Code
The complete statistical breakdown of 0fee.dev: 86 sessions, 70,000+ lines, 90+ endpoints, 8 SDKs, and more. By Juste A. Gnimavo.
What No Human Engineer Would Do: 42 Files in 45 Minutes
Analyzing Session 001 of 0fee.dev: 42 files and 7,900 lines in 45 minutes. What AI does differently from human engineers. By Juste A. Gnimavo.
What's Next for 0fee.dev
The roadmap for 0fee.dev: subscriptions, payouts, dispute management, more African providers, and multi-currency wallets. By Juste A. Gnimavo.
The Big Currency Update: Source and Destination Currencies
How we redesigned 0fee.dev's currency model with source and destination currencies across 13 files. By Juste A. Gnimavo and Claude.
WAL Race Conditions and SQLite Lessons
The WAL mode race conditions that plagued 0fee.dev's SQLite database and ultimately pushed us to PostgreSQL. By Juste A. Gnimavo.
Amount Display Bugs: When 5 USD Shows as 0.05
The amount display bugs that plagued 0fee.dev: wrong divisions, integer vs float, and how we fixed them across 50+ files. By Juste A. Gnimavo.
Fixing Infinite Loops and 500 Errors
The infinite loops and 500 errors that struck 0fee.dev across multiple sessions, and how we traced and fixed each one. By Juste A. Gnimavo.
86 Sessions in 80 Days: The Complete Build Timeline
The complete build timeline of 0fee.dev: 86 sessions across 80 days, from first commit to production deployment. By Juste A. Gnimavo.
The December 12 Marathon: 13 Sessions in One Day
13 development sessions in a single day: the December 12 marathon that transformed 0fee.dev from prototype to platform. By Juste A. Gnimavo.