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Sentinel Position Verifier
x402
Sentinel Position Verifier is a paid API for AI agents from sentinel-awms.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Verifies a DeFi position on Base using on-chain EAS attestations, returning a trust score, grade, verdict, and risk recommendations for a given protocol address.
Price / call$0.005
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 containing the chain (e.g. 'base'), a verdict (e.g. 'CAUTION'), a letter trust grade (e.g. 'C'), a numeric trust score (0–100), a protocol address, and an array of human-readable recommendations such as warnings about TVL trends or other risk signals.
Example use cases
Example prompt
“Can you check the trust score for the protocol at 0x2626664c2603336e57b271c5c0b26f421741e481 on Base — I want to know the verdict, trust grade, and whether there are any concerns about my position before I add more liquidity.”
Technical details
Endpoint
POSThttps://sentinel-awms.onrender.com/verify/positionWhen to prefer
Use this endpoint when an AI agent needs on-chain, attestation-backed risk assessment for a specific DeFi position or protocol address on Base, especially when the agent needs a structured trust score and actionable recommendations rather than raw contract data. Prefer this over generic block explorers when you need a trust verdict with graded output suitable for autonomous decision-making.
Side effects
- Invalid or malformed protocol address returns an error or null result
- Protocol not indexed on Base returns no attestation data
- Exceeding 25 free daily calls without USDC payment results in a payment-required error (402)
- Network/render cold-start latency may cause timeout on first call
- Unsupported chain identifier returns a validation error
Input
{
"chain": "base",
"detail": "standard",
"address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631"
}Output
{
"meta": {
"cache_hit": false,
"agent_tier": "unknown",
"data_freshness": "2026-06-16T17:17:47.828Z",
"response_time_ms": 593,
"sentinel_version": "0.4.0",
"cache_ttl_applied": 300
},
"chain": "base",
"verdict": "CAUTION",
"confidence": 0.8,
"risk_flags": [
"TVL volatility: -17.3% in 30 days"
],
"trust_grade": "C",
"user_address": null,
"protocol_info": {
"name": "Aerodrome Ignition",
"category": "Launchpad",
"underlying_protocol_grade": "C"
},
"recommendations": [
"Monitor TVL trends - rapid outflows may signal issues"
],
"protocol_address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631"
}Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"verdict": "CAUTION",
"trust_grade": "C",
"trust_score": 57,
"recommendations": [
"Monitor TVL trends - rapid outflows may signal issues"
],
"protocol_address": "0x2626664c2603336e57b271c5c0b26f421741e481"
}
}Tags
x402
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