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SignGate x402 Origin Due Diligence
x402
SignGate x402 Origin Due Diligence is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Performs a pre-purchase risk assessment on an x402 API or service endpoint, returning a risk score, risk level, and flags before an AI agent commits to buying it.
Price / call$0.01
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
A JSON object containing the EIP-155 network identifier (e.g. eip155:8453), product name, a risk score (numeric), a risk level (e.g. 'low', 'medium', 'high'), an array of risk flags, plus identity, activity, assessment, and provenance sub-objects describing the x402 origin.
Example use cases
Pre-purchase check on unknown data API
“I found an x402 dataset API at https://data-provider.example.com — before you spend any money on it, can you run a risk assessment through SignGate and tell me the risk level and any flags?”
Screening a new AI tool before agent autonomy
“My agent is about to buy access to https://tools.aimarket.xyz/sentiment-api — please do a preflight due diligence check first so I can confirm the risk score is low before authorizing the payment.”
Verifying seller wallet before bulk API purchases
“We're planning to use an x402 API from seller wallet 0xAbC1234567890abcdef1234567890abcdef123456 — run a SignGate origin due diligence check on https://api.example.com/v1/data and tell me if there are any red flags or a high risk score before we proceed.”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/x402/origin-due-diligenceWhen to prefer
Use this endpoint when an AI agent needs to autonomously decide whether to purchase an x402-gated API, dataset, or tool and requires a governance checkpoint — especially when the seller or service is unknown, the price or sensitivity is above threshold, or your policy requires pre-approval before spending. Prefer this over generic URL reputation services because it is specifically designed for x402 on-chain payment contexts and returns x402-native signals like transaction count, buyer diversity, and seller wallet identity.
Side effects
- Invalid or unreachable server_url returns an error or empty assessment
- Malformed seller address (not a valid 0x EVM address) causes a validation error
- Unknown or unindexed x402 origin may return limited data with no activity or identity info
- Network timeouts if the origin URL is slow to respond
- Missing required server_url parameter returns a 400-level error
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "x402-origin-due-diligence",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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