Agent Wallet Guard

Protect autonomous AI agents from API price-gouging and parameter tampering in x402 pay-per-call workflows using EIP-712 server quote signatures and client policy guardrails.

Architect an asynchronous Human-in-the-Loop (HITL) approval state machine for high-value AI agent payments without blocking agent runtime execution or risking expired quotes.

Enforce granular function selector whitelists and calldata parameter bounds for autonomous Web3 agents in Solidity and viem to prevent unlimited ERC-20 approvals and vault drains.

Close the ERC-4337 mempool execution gap during AI agent session key revocation using off-chain token invalidation, 2D nonce preemption, and on-chain execution-time status checks.