agent-mrkt

This project is an AI agent marketplace that enables users to publish and consume AI agent APIs using stablecoins (USDC, EURC and PYUSD) payments. The payment is done in a permissionless way and accessing of the digital products as well. As long as you have the coin, you get to use the project

The marketplace operates on a publisher-consumer model where:

• Publishers create and sell access to their AI agent APIs
• Consumers pay with stablecoins (USDC/PYUSD) to access these APIs
• Smart contracts handle automatic billing after successful API calls
• Cross-chain infrastructure supports USDC on Arbitrum, Base, and Ethereum networks

The core innovation lies in the payment architecture using Permit2 for gasless approvals and Circle's CCTP V2 for cross-chain transfers, eliminating the need for users to manually approve each transaction while maintaining security through user-set spending limits. While providing an option to pay and receive using PYUSD

Frontend Technologies:

• Next.js with TypeScript for the web application
• shadcn/ui components with a cyberpunk aesthetic theme
• wagmi and viem for Web3 integration
• MobX for state management

Backend & Infrastructure:

• Rust backend for core business logic
• lowdb.js for local data persistence
• Permit2 integration for gasless token approvals
• Circle CCTP V2 for cross-chain USDC transfers

Smart Contract Architecture:

• Charger contract that handles all payment operations
• Pre-approval system using Permit2 permissions
• Post-call automatic charging after successful API responses
• Multi-chain support with automatic routing

Key Technical Features:

• State channels for instant settlement
• Browser-based wallet integration
• API key management and usage tracking
• Real-time balance verification and pre-authorization
• Cross-chain payment routing with attestation polling

Notable Technical Implementation:

• Permit2 integration eliminates the need for traditional ERC20 approvals
• CCTP V2 implementation for seamless cross-chain transfers
• Hub-and-spoke model reduces complexity while maintaining decentralization
• Local database with JSON persistence for MVP simplicity