Experimental Infrastructure·2025·Independent
402Guard
A policy and finance-operations guardrail for x402-enabled autonomous machine payments.
Overview & Research Motivation
A developer proxy and policy layer intercepting outbound HTTP requests from autonomous agents. It enforces spend caps, quota management, and invoice tracking over x402 payments using an Avalanche Fuji Solidity subscription registry.
The Core Systems Problem
- Autonomous agents need bounded financial controls to prevent accidental over-spending on pay-per-request API endpoints.
My Specific Technical Contributions
- Built the Axios/Fetch interceptor proxy and deployed Avalanche Solidity subscription contracts.
Technical Stack & Tools
TypeScriptSolidityAvalanche FujiNode.js