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Sentinel Protocol Verifier
x402
Sentinel Protocol Verifier is a paid API for AI agents from sentinel-awms.onrender.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-11).
Verifies a DeFi protocol's on-chain address on Base and returns a risk verdict, trust grade, confidence score, and specific risk flags using EAS attestations.
Price / call$0.008
Success—
StatusUnknown
How this service works
Trust infrastructure for autonomous AI agents on Base. Verify protocols, tokens, positions, and counterparties with on-chain EAS attestations. 25 free calls/day, then pay per query in USDC via x402.
Output
A JSON object containing: the chain ('base'), the queried address, a verdict (e.g. LOW_RISK/MEDIUM_RISK/HIGH_RISK), a confidence score (0–1), a trust grade letter (A–F), a numeric trust score (0–100), and an array of specific risk flags such as 'Proxy contract - admin upgrade possible'.
Example use cases
Example prompt
“Can you run a Sentinel trust check on the Base protocol at address 0x2626664c2603336e57b271c5c0b26f421741e481 and tell me the risk verdict, trust grade, and any specific risk flags before I deposit funds?”
Technical details
Endpoint
POSThttps://sentinel-awms.onrender.com/verify/protocol?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to autonomously assess the safety of a specific DeFi protocol or smart contract on the Base network before executing a transaction or recommending an interaction. Preferred over generic block explorers when you need a structured, machine-readable risk verdict with confidence scores and enumerated risk flags rather than raw on-chain data.
Side effects
- Unknown or unindexed address returns low confidence or insufficient data
- Invalid address format returns a 400-level error
- Network unavailability on Base may delay attestation lookup
- Daily free tier (25 calls) exceeded without USDC payment configured returns 402
- Address on non-Base chain returns unsupported chain error
Input
{
"chain": "base",
"detail": "standard",
"address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631"
}Output
{
"meta": {
"cache_hit": false,
"agent_tier": "unknown",
"data_freshness": "2026-06-16T17:17:40.554Z",
"response_time_ms": 2061,
"sentinel_version": "0.4.0",
"cache_ttl_applied": 600,
"contract_metadata_degraded": false
},
"chain": "base",
"address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631",
"verdict": "CAUTION",
"evidence": {
"tvl": {
"stable": false,
"trend_30d": "-17.3%",
"current_usd": 24590153
},
"audit": {
"audited": true,
"auditors": [
"Ether Authority"
],
"last_audit": "2024-06-05",
"months_since_audit": 25
},
"contract": {
"age_days": null,
"proxy_pattern": null,
"owner_is_multisig": null
},
"exploit_history": {
"exploited": false,
"incidents": []
}
},
"confidence": 0.88,
"risk_flags": [
"Audit is 25 months old - may not reflect current code"
],
"trust_grade": "C"
}Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"address": "0x2626664c2603336e57b271c5c0b26f421741e481",
"verdict": "LOW_RISK",
"confidence": 0.88,
"risk_flags": [
"Proxy contract (Proxy) - admin upgrade possible"
],
"trust_grade": "B",
"trust_score": 70
}
}Tags
x402
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