SentinelNet
SentinelNet
Problem Statement
35,000+ agents are registered on the ERC-8004 Identity Registry on Base. Any agent can register -- there's no built-in mechanism to know which ones are trustworthy, which are sybil clusters, and which are interacting with malicious contracts. When agents need to transact with unknown counterparties, they're flying blind. The identity layer (ERC-8004) tells you WHO an agent is. But it doesn't tell you WHETHER to trust them. There's a critical gap between identity and reputation. SentinelNet fills this gap. It autonomously analyzes every registered agent's on-chain behavior and publishes composable, verifiable trust scores directly to the ERC-8004 Reputation Registry -- so any agent can check a counterparty's trustworthiness before transacting. The scores are backed by IPFS evidence and ETH stakes, creating accountability. If SentinelNet is wrong, anyone can challenge within 72 hours. SentinelNet found real threats: 84 sybil networks controlling 2,119+ fake agents (56% of all scored agents), and rejected 73% of the ecosystem. The ecosystem health score is 26/100 -- the registry has a trust crisis, and SentinelNet is the only system quantifying it.
SentinelNet is the immune system for the ERC-8004 agent economy on Base. It runs 24/7 as Agent #31253 -- discovering every agent on the Identity Registry, analyzing on-chain behavior across Base and Ethereum, computing 5-dimensional trust scores with dual-method sybil detection and PageRank-style trust contagion, staking ETH behind every score, publishing verifiable evidence to IPFS, and writing composable reputation on-chain via the Reputation Registry. Zero human involvement. Any agent or contract can query SentinelNet before transacting with an unknown counterparty. One API call returns a trust score backed by on-chain proof, IPFS-pinned evidence, and staked ETH. ### What It Found -- Real Threats in the Live Ecosystem - **One wallet (0x67722c...) registered 260 agents** -- 88% sequential IDs. 253 flagged as sybil, 254 REJECTED. - **84 sybil networks** -- the top 3 operators control 502 fake agents - **2,119+ sybil agents** flagged (56% of all scored agents are sybils) - **754 agents** penalized by trust contagion -- average -11 points for associating with flagged counterparties - **2,743 agents REJECTED** (73% of scored agents) - **Ecosystem health score: 26/100** -- the registry has a trust crisis, and SentinelNet is the only system quantifying it ### What's Running Right Now - **3,769+ agents scored** across all 3 verdict classes (TRUST/CAUTION/REJECT) - **585 trust scores written on-chain** to TrustGate contract - **On-chain feedback** on the ERC-8004 Reputation Registry (Base Mainnet) - **IPFS evidence** pinned for every scored agent - **SentinelNetStaking** -- ETH staked behind every published score, 72-hour challenge window - **TrustGate** -- composable on-chain trust oracle (isTrusted(), getTrustScore(), onlyTrusted modifier) - **Dual-method sybil detection** -- wallet-sharing clusters + interaction graph clique analysis - **PageRank-style trust contagion** -- bad actors drag down their counterparties' scores - **Exponential trust decay** -- scores degrade over time, trust is not permanent - **8 MCP tools** for agent-to-agent trust queries - **27 REST API endpoints** with rate limiting and API key authentication - **WebSocket** real-time score stream - **Webhook subscriptions** for trust change notifications - **Anomaly detection** -- rapid score drops, suspicious patterns - **Agent marketplace** with trust gating and filtering - **Trust network visualization** -- D3.js force-directed graph of agent interactions - **Python SDK** (sync + async) and **JavaScript SDK** (TypeScript types) - **Prometheus /metrics** endpoint for production monitoring - **Embeddable SVG trust badges** - **147 tests** across 20 test files, all passing - **Agent ID 31253** registered on ERC-8004 Identity Registry ### Architecture Autonomous loop: **Discover -> Analyze -> Score -> Contagion -> Sybil Check -> Stake -> Publish -> Alert -> Repeat** (every 30 minutes) 5 scoring dimensions: - **Longevity** (15%) -- Wallet age via logarithmic curve: 15 * ln(age + 1) - **Activity** (20%) -- Transaction volume (sqrt scaling), active day consistency, ETH balance - **Counterparty Quality** (20%) -- Verified vs flagged interaction ratio - **Contract Risk** (20%) -- Malicious contract exposure, unverified contract ratio - **Agent Identity** (25%) -- ERC-8004 metadata completeness, on-chain reputation from ALL clients, wallet exclusivity ### Smart Contracts (Base Mainnet -- All Verified on Blockscout) - **SentinelNetStaking** (0xABEB1fa61b0b3B271D1E1E102289579251ABd6F7) -- stakeScore(), challenge(), 72h window, TrustDegraded events - **TrustGate** (0x10D8caC126849123Cc1fb5806054be6c90343CC8) -- composable trust oracle with 585 scores written. Other contracts inherit and use onlyTrusted(agentId) modifier - **ERC-8004 Identity Registry** (0x8004A169FB4a3325136EB29fA0ceB6D2e539a432) -- Agent #31253 registered - **ERC-8004 Reputation Registry** (0x8004BAa17C55a88189AE136b182e5fdA19dE9b63) -- giveFeedback() with IPFS URIs ### 8 Integration Paths 1. **Smart Contract** -- TrustGate.sol with onlyTrusted() modifier 2. **Python SDK** -- pip install sentinelnet (sync + async) 3. **JavaScript SDK** -- npm install sentinelnet (TypeScript) 4. **REST API** -- 27 endpoints with rate limiting 5. **MCP** -- 8 tools for agent-to-agent queries 6. **WebSocket** -- real-time score stream 7. **Webhooks** -- trust change notifications 8. **Prometheus** -- /metrics for monitoring ### Key Technical Decisions 1. 5th scoring dimension (Agent Identity) broke score clustering -- 93 agents had identical scores before this fix 2. Dual-method sybil detection catches both wallet-sharing and closed interaction loops 3. PageRank-style trust contagion propagates distrust through the interaction graph 4. Exponential decay forces continuous re-evaluation -- trust is not permanent 5. TrustGate contract makes SentinelNet composable infrastructure, not just a scoring tool 6. Score staking creates economic accountability -- anyone can challenge within 72 hours 7. Gasless on-chain writes via Coinbase CDP Paymaster (ERC-4337 Smart Account)
Team
SentinelNet
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- ›Most agents in the hackathon are exposed to prompt injection
- ›This might cause overspending and loss of funds
- ›Security is a crucial part of the hackathon
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Intention
Plans to continue
SentinelNet solves a real infrastructure gap in the ERC-8004 ecosystem. Planning to expand to multi-ecosystem scoring (Virtual Protocol, Autonolas, ai16z/ElizaOS), cross-chain trust (Arbitrum, Optimism), trust-gated DeFi, and DAO governance for threshold tuning.