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Nomos Merchant Trust Assessment
x402
Nomos Merchant Trust Assessment is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-15).
Evaluates the risk and trustworthiness of a merchant for a given payment or transaction context, returning a risk score, risk level, and flags.
Price / call$0.2
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 the network (e.g. 'eip155:8453' for Base), product name ('nomos-merchant-trust'), and an assessment object containing risk_level ('low', 'medium', or 'high'), a numeric risk_score, and a flags array listing any specific risk signals. May also include identity, activity, and provenance sub-objects with enriched merchant context.
Example use cases
Pre-payment merchant risk check
“My agent is about to pay 200 USDC to merchant 'globalparts-supplier' from 'https://globalparts.io' for 'hardware procurement' — can you check their trust level and risk score before we proceed?”
Flagging unknown merchants in agent workflows
“I have an autonomous agent that pays vendors automatically. Before it sends 15 USDC to merchant ID 'new-vendor-xyz' at origin 'https://newvendor.example.com' for 'API access', assess whether this merchant is low, medium, or high risk.”
Verifying known merchant trust before large transfer
“We're about to authorize a 500 USDC payment to our recurring merchant 'enterprise-saas-42' from 'https://saas42.com' for 'annual license renewal' — run a Nomos trust preflight and confirm the risk score is acceptable before my agent executes.”
Technical details
Endpoint
POSThttps://base-agent-preflight.bytoken2023.workers.dev/x402/v1/merchant/trustWhen to prefer
Use this endpoint when an autonomous agent needs a fast, pay-per-request preflight trust signal for a specific merchant before executing a USDC payment on Base. Prefer it over generic fraud APIs when you need blockchain-native risk scoring tied to merchant identity and on-chain provenance, and when operating in agentic pipelines that already use x402 micropayment infrastructure.
Side effects
- Missing required query params (merchant_id, origin, amount_usdc, purpose) returns a 400 validation error
- Invalid amount_usdc format (non-numeric or wrong precision) causes schema rejection
- Payment of 0.2 USDC required via x402 protocol; missing or failed payment returns 402
- Unknown merchant_id with no data may return risk_level 'unknown' with zero score and no flags
- Network or Cloudflare Worker outage returns 5xx; retry with idempotency_key to avoid double-charge
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "nomos-merchant-trust",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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