Mantle-402

HTTP 402 Payment Required middleware for Mantle Network Monetize your APIs with on-chain blockchain payments

Videos

Description

Mantle-402 is an open-source Express.js middleware that enables API monetization through blockchain payments.

🔌 One-line integration - Add middleware to any endpoint

💰 Flexible pricing - Pay-per-request or prepaid balance

⚡ Low fees - Built on Mantle L2 for cheap microtransactions

🔒 Secure - On-chain payment verification, no chargebacks

Perfect for developers who want to monetize their APIs without complex payment integrations.

GitHub: https://github.com/CemAyyildiz/mantle-402

Progress During Hackathon

✅ Core middleware implementation (mantle402, mantle402Contract, mantle402Marketplace) ✅ Smart contracts deployed on Mantle Sepolia testnet (Mantle402.sol, Mantle402Marketplace.sol) ✅ TypeScript package with full type definitions ✅ Example server with multi-tier pricing ✅ Landing page with documentation ✅ npm package ready for distribution Built from scratch during the hackathon. All code is open-source and production-ready.

Tech Stack

Node

Solidity

Web3

Fundraising Status

Seeking Grant Funding

Team LeaderCCem AYYILDIZ

Github

Github Link

https://github.com/CemAyyildiz/mantle-402

Sector

InfraDeFi