Self-Monetizing APIs Using Solana Blockchain and HTTP 402 Payment Required

Short summary

Tutorial demonstrating a self-monetizing API using HTTP 402 Payment Required status with Solana blockchain infrastructure. Shows how to build Express endpoints with tiered pricing (free, 0.001 SOL, 0.005 SOL) using MPP Testkit SDK, eliminating traditional payment processor overhead for micropayments. Includes complete working code examples for both server and client, enabling true per-request billing without Stripe, subscriptions, or centralized intermediaries.

• •Blockchain-based API monetization eliminates Stripe overhead and enables true micropayments
• •HTTP 402 Payment Required status with Solana provides instant on-chain payment verification
• •Complete working examples with Express server and auto-paying client, ready to deploy on devnet

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