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Sentinel Counterparty Verifier
x402
Sentinel Counterparty Verifier is a paid API for AI agents from sentinel-awms.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Verifies an on-chain counterparty address on Base using EAS attestations, returning a trust grade, trust score, risk flags, and a safety verdict
Price / call$0.01
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
Returns a JSON object with the chain, address, a verdict (e.g. SAFE or UNSAFE), an array of risk_flags, a letter trust_grade (e.g. A), and a numeric trust_score (0-100).
Example use cases
Example prompt
“Before I send funds, can you check if the address 0x1234567890abcdef1234567890abcdef12345678 on Base is safe — give me its trust grade and any risk flags?”
Technical details
Endpoint
POSThttps://sentinel-awms.onrender.com/verify/counterpartyWhen to prefer
Use this endpoint when an AI agent needs to screen a wallet, smart contract, or DeFi counterparty on Base before executing a transaction, and requires on-chain EAS-backed attestation data rather than off-chain reputation heuristics. Prefer this over generic blockchain explorers when you need a structured trust score and verdict with risk flags.
Side effects
- Invalid or malformed address returns an error response
- Address not found on Base returns unknown or unscored result
- Exceeds 25 free daily calls without USDC payment triggers 402 payment required
- Network or provider downtime on Render may cause 503 errors
- Invalid chain identifier returns a validation error
Input
{
"chain": "base",
"detail": "standard",
"address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631"
}Output
{
"meta": {
"warnings": [],
"cache_hit": false,
"agent_tier": "unknown",
"ofac_skipped": false,
"data_freshness": "2026-06-12T04:49:28.885Z",
"response_time_ms": 864,
"sentinel_version": "0.4.0",
"cache_ttl_applied": 900
},
"chain": "base",
"address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631",
"verdict": "SAFE",
"evidence": {
"sanctions": {
"list": null,
"sanctioned": false,
"addresses_screened": 87,
"screening_degraded": false
},
"reputation": {
"is_mixer": false,
"is_phishing": false,
"is_malicious": false,
"is_cybercrime": false,
"is_money_laundering": false
},
"exploit_association": {
"associated": false
}
},
"confidence": 0.9,
"risk_flags": [
"Address is a contract, not an EOA"
],
"trust_grade": "A"
}Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"address": "0x1234567890abcdef1234567890abcdef12345678",
"verdict": "SAFE",
"risk_flags": [],
"trust_grade": "A",
"trust_score": 88
}
}Tags
x402
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