This article was originally published on AI Study Room . For the full version with working code examples and related articles, visit the original post. Selling API Access: Build and Monetize a Developer API Business in 2026 Selling API access is one of the most lucrative business models in tech — Stripe, Twilio, and OpenAI all built billion-dollar companies by selling APIs. For developers, the API-as-a-product model is a natural fit: you build something developers want, charge per API call or subscription, and scale programmatically. This guide covers how to design, price, and launch a paid API product.…