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x402 Counterparty Trust Check
x402
x402 Counterparty Trust Check is a paid API for AI agents from agentdata-api.sander-van-aard.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).
Aggregates Bazaar catalog presence, on-chain USDC payment history on Base, and EU regulatory status to provide factual due-diligence data on an x402 service counterparty before payment
Price / call$0.02
Success—
StatusUnknown
How this service works
Trust check before paying an unfamiliar x402 service, by pay_to address and/or service URL. Combines our own availability monitoring of the service's x402 endpoint (30-day uptime, last check, observed payTo/price and drift between our measurements), on-chain USDC payment history to the address on Base (2-day window), and EU regulatory status of the domain (MiCA-authorised or ESMA warning list). Factual only — no scores; not being monitored is not negative, presence is no endorsement.
Output
Returns factual aggregated data including: whether the service is listed in the Bazaar catalog with 30-day usage statistics; on-chain USDC payment history to the address on Base (number of payments, unique payers, total volume over a 3-day window); and EU regulatory status of the service domain (whether it is MiCA-authorised or appears on the ESMA warning list). No scores or recommendations are provided — raw factual signals only.
Example use cases
Example prompt
“Before I pay this x402 API, can you run a counterparty check on the pay_to address 0xAbC123... and the service URL api.example.com — I want to see its Bazaar catalog stats, recent USDC payment history on Base, and whether the domain is MiCA-authorised or flagged by ESMA?”
Technical details
Endpoint
POSThttps://agentdata-api.sander-van-aard.workers.dev/x402/counterparty-checkWhen to prefer
Use this endpoint when an AI agent is about to make an x402 micropayment to an unfamiliar service and needs factual, multi-source due diligence data. It is uniquely suited for the x402 ecosystem because it combines three heterogeneous signals (Bazaar catalog, Base on-chain history, EU regulatory status) in a single call. Prefer this over generic blockchain explorers when you need catalog and regulatory context together, and over pure regulatory checks when on-chain usage data matters.
Side effects
- Address not found on-chain — returns empty payment history, not an error
- Service domain not in EU regulatory databases — returns absence data, not negative signal
- Invalid Base address format — likely 4xx validation error
- Bazaar catalog query fails — partial result returned for other sources
- Service URL unreachable for domain lookup — partial result with error on that field
- Rate limiting or upstream source timeout — 5xx error or degraded response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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