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SignGate Agent Buyer Address Risk Check
x402
SignGate Agent Buyer Address Risk Check is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).
Screens a blockchain wallet address for risk level before an AI agent proceeds with an x402 micropayment purchase
Price / call$0.01
Success—
StatusDown
How this service works
Pay-per-request identity, risk, authorization, execution-preflight and evidence APIs for autonomous agents.
Output
Returns a JSON object with the network identifier (e.g. 'eip155:8453'), product name ('address-risk'), and an assessment object containing: risk_level (e.g. 'low', 'medium', 'high'), numeric risk_score (0–100), and a flags array listing any specific risk signals detected. May also include identity, activity, and provenance sub-objects for additional context.
Example use cases
Pre-purchase wallet screening for AI agent
“My autonomous agent is about to buy a data feed using x402 on Base — can you check whether the buyer wallet 0x1234567890abcdef1234567890abcdef12345678 is low-risk before it sends the payment?”
Compliance gate before agent API onboarding
“Before we allow the agent with wallet 0xDeAdBeEf1234567890abcdef1234567890abcdef to onboard and pay for a sensitive dataset on eip155:8453, run an address risk assessment and tell me the risk score and any flags.”
Approval policy enforcement for high-value agent spend
“My agent is attempting a payment action with wallet 0xaabbccddeeff00112233445566778899aabbccdd on Base — check if this address passes our risk threshold so I can decide whether to approve the spend.”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/agent-risk/address-riskWhen to prefer
Use this endpoint when an AI agent is about to execute an x402 micropayment and you need a fast, pre-transaction risk gate specifically designed for agent buyer governance. Prefer this over generic blockchain analytics when you need a simple pass/fail risk score with flags tailored to the x402 purchase context (APIs, datasets, tools). It is particularly useful for autonomous agent pipelines that need lightweight, cheap ($0.01 USDC) compliance checks without heavy KYC infrastructure.
Side effects
- Invalid address format (not a 0x hex address of 40 chars) returns a validation error
- Unsupported or unrecognized chain label may return empty or error response
- Missing required query params (chain or address) returns 400-level error
- Address not found on-chain may return low score with no data rather than an error
- Service unavailability from Cloudflare Workers results in 5xx with no assessment
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "address-risk",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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