I built an autonomous security agent for AI wallets — didn’t win the hackathon, but I think the idea matters

Hey r/ethereum,

During a 5-day hackathon on Arc L1, I built ArcWarden — an agent that protects other AI agents handling USDC onchain.

The problem

AI agents can execute transactions autonomously.

If one gets compromised, it can drain a wallet instantly.

There’s no native security layer — and existing solutions cost more than the transactions themselves.

The idea

ArcWarden is not a security tool.

It’s an economic agent that lives inside the system it protects.

It charges $0.001 USDC per decision

It evaluates transactions before execution

It returns: ALLOW / BLOCK / ESCALATE

It pays for deeper analysis itself (Claude API)

It logs decisions onchain

Why this is different

Instead of adding security from the outside,

ArcWarden participates in the economy:

→ Agents pay ArcWarden

→ ArcWarden secures them

→ ArcWarden pays for intelligence

→ Everything is autonomous

A closed agent-to-agent loop.

What’s real (not just a demo)

389 onchain transactions

Real Circle wallets (multi-agent simulation)

Smart contract logging blocked attacks

~1,600+ USDC protected during testing

Contract: https://testnet.arcscan.app/address/0x17430A67e11535466cC5f17e736D5e4643B86ba1

Honest note

The demo was too technical — reviewers didn’t understand it.

That’s on me. Still improving how I explain it.

Stack

Python · FastAPI · web3.py · Vyper · Circle DCW · x402 · SQLite · numpy

If you're building in agentic systems or onchain automation,

I’d really appreciate your feedback.

GitHub: https://github.com/ibonon/Arcwarden

— Eric Warma

Solo builder · Burkina Faso