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Nomos Merchant Risk & Policy Check
x402
Nomos Merchant Risk & Policy Check is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Evaluates a merchant's identity, risk level, and authorization policy before an autonomous agent executes a payment or transaction on its behalf.
Price / call$0.05
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 containing the network (e.g. eip155:8453 for Base), product identifier, and an assessment object with risk_score (numeric), risk_level (e.g. 'low'), and flags array. May also include identity, activity, and provenance sub-objects with additional merchant context.
Example use cases
Pre-payment merchant safety screen
“I'm about to pay merchant 'shop_0xABCD1234' $10.50 USDC for 'marketplace goods' — can you check their risk score and flag anything suspicious before I authorize the payment?”
Autonomous agent payment guardrail
“My agent is trying to send $500 USDC to merchant 'vendor_logistics_99' for 'logistics services'. Run a preflight merchant check and only proceed if the risk level comes back low.”
Unknown merchant trust evaluation
“I've never transacted with merchant 'unknown_creator_7890' before — treat them as trust level 'unknown' and check whether a $75 USDC payment for 'digital art commission' is flagged as risky.”
Technical details
Endpoint
POSThttps://base-agent-preflight.bytoken2023.workers.dev/x402/v1/policy/merchant-checkWhen to prefer
Use this endpoint when an autonomous agent needs to vet a merchant before executing a USDC payment on Base, especially for unknown or unverified counterparties. Prefer this over generic KYC or onchain lookup tools when you need a combined risk score, flags, and identity assessment in a single pay-per-request call optimized for agentic preflight workflows on the Base network.
Side effects
- Missing required query parameters (merchant_id, purpose, amount_usdc) returns a validation error
- Invalid amount_usdc format (not matching numeric pattern) causes a 400 error
- Merchant not found in identity registry may return unknown risk level with empty flags
- Network or Cloudflare Worker timeout returns a 5xx error
- Invalid trust_level enum value (not unknown/known/verified) causes schema rejection
- Payment of $0.05 USDC required via x402 protocol; missing payment returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "nomos-merchant-check",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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