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Base Address Preflight Safety Check
x402
Base Address Preflight Safety Check is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.075/call, status unknown (last checked 2026-09-13).
Inspects a Base (EIP-155:8453) wallet address for risk signals, flags, and activity before an autonomous payment is made
Price / call$0.075
Success—
StatusUnknown
How this service works
Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.
Output
Returns a JSON object with network identifier (eip155:8453), product name, risk_level (e.g. low/medium/high), numeric risk_score, array of flags, plus activity, identity, assessment, and provenance sub-objects describing the address's on-chain history and signals.
Example use cases
Example prompt
“Before my agent sends USDC to 0x4a3b9c1d2e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b on Base, can you run a preflight safety check on that address and tell me the risk level and any flags?”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/base/address-preflightWhen to prefer
Use this endpoint when an autonomous agent is about to send a payment to a Base wallet address and needs a machine-readable safety assessment before executing. Prefer this over generic blockchain explorers when you need a structured risk_level and flags array specifically designed for agent preflight decisions on the Base (EIP-155:8453) network.
Side effects
- Invalid address format (not a valid 0x hex address) — returns validation error
- Address not found or no on-chain data — returns empty activity with low risk score
- Network timeout or upstream data provider unavailability — returns 5xx error
- Missing required 'address' query parameter — returns 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "base-address-preflight",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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