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SignalLayer Agent Preflight Check
x402
SignalLayer Agent Preflight Check is a paid API for AI agents from signallayer.floot.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).
Pre-flight safety check that scores and verdicts a target URL or Base EVM address before an autonomous agent spends money or interacts with it
Price / call$0.01
Success—
StatusUnknown
How this service works
Machine-native decision and data primitives for autonomous agents, paid per call with x402 V2 USDC on Base.
Output
Returns a decision object with a numeric safety score (0-100), a verdict ('pass' or equivalent), a confidence value between 0 and 1, an array of warnings, and a freshness block showing when the check was performed and how long results are valid.
Example use cases
Safe-to-pay check before USDC transfer
“Before my agent sends any USDC to https://api.vendor.xyz/checkout, do a preflight check on it with intent 'pay' on eip155:8453 and tell me the safety score and verdict.”
Smart contract risk scoring
“I want my agent to interact with the Base address 0xAbCd1234...5678 — can you preflight it with intent 'interact' on eip155:8453 before it does anything, and warn me if the confidence score is below 0.8?”
Unknown resource trust assessment
“My agent found a new resource it wants to transfer to at https://unknown-dapp.io/bridge — preflight it with intent 'transfer' on the Base network and a max price of $0.10 so we know if it's safe to proceed.”
Technical details
Endpoint
GEThttps://signallayer.floot.app/_api/v1/agent/preflight?utm_source=zero.xyzWhen to prefer
Use this endpoint when an autonomous agent needs a machine-readable trust signal before committing to any on-chain payment, transfer, or interaction on Base. Prefer it over generic URL checkers when you need a combined risk score plus blockchain-aware context, especially when operating in a pay-per-call x402 environment where false positives cost money.
Side effects
- Target URL or address is unreachable or malformed — endpoint may return an error or low-confidence result
- Network CAIP-2 identifier is unsupported or mismatched — validation may fail
- Stale or cached result if freshness maxAgeSeconds has elapsed since last check
- Missing required 'intent' or 'target' query parameters — request rejected
- Target is a known malicious address — verdict 'fail' returned with warnings populated
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"tool": "agent_preflight",
"status": "complete",
"decision": {
"score": 92,
"verdict": "pass",
"confidence": 0.93
},
"warnings": [],
"freshness": {
"checkedAt": "2026-10-06T00:00:00.000Z",
"maxAgeSeconds": 30
}
}
}Tags
x402
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