Payagent

PayAgent is an autonomous AI payment agent that converts plain-English instructions into real on-chain USDC transfers. No per-transaction popups. No manual signing for every payment. Just describe what you want and the agent handles everything.

How it works:

The agent runs a 4-stage A2A pipeline on every request:

1. Parse — Venice AI (Llama 3.3 70B) extracts recipients, amounts, and frequency from natural language. Privacy-first: your financial data never leaves a trusted inference boundary.

2. Validate — Risk screening against amounts and address format.

3. x402 Fetch — The agent autonomously pays 0.01 USDC to access a live ETH/BTC price feed via the x402 protocol. This is genuine machine-to-machine commerce — no human clicks, one agent paying another agent for data.

4. Plan — Structured payment plan presented for one-time approval.

After the user approves via MetaMask, the agent executes transfers through ERC-7710 delegation to the 1Shot permissionless relayer — gasless, no ETH required, no further popups.

Tech Stack:

• Venice AI (Llama 3.3 70B) — sole AI provider, privacy-first inference

• x402 protocol — A2A micropayments for live market data

• MetaMask Smart Accounts + ERC-7710 delegation

• 1Shot Permissionless Relayer — gasless execution on Base

• Next.js 15 + TypeScript

Proven on-chain:
0x76201cf747d6eb32809c6d84e5ae9221db5c324c6ec984945e58e29b73c91a16 — Base Sepolia

GitHub: https://github.com/Osiyomeoh/payagent

Built a fully working autonomous on-chain payment agent from scratch during the hackathon:

• Venice AI integration — privacy-first Llama 3.3 70B as the sole inference engine, parsing natural language payment instructions without exposing financial data to centralized servers

• x402 A2A micropayments — agent autonomously pays 0.01 USDC for live ETH/BTC price data, the first real machine-to-machine commerce in our pipeline

• MetaMask Smart Accounts — full ERC-7710 delegation flow using the MetaMask Delegation Toolkit v0.13.0, with ERC-7715 permission grants

• 1Shot Relayer integration — gasless execution via the 1Shot permissionless relayer on Base, no ETH required from users

• 4-stage A2A pipeline — Parse → Validate → x402 Fetch → Plan, fully animated and running in production

• Landing page + full UI — complete product with agent chat, task dashboard, settings, and delegation chain visualization

• Real on-chain transactions — live USDC transfers on Base Sepolia with verified tx hashes on BaseScan

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