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x402 Seller Legitimacy Check
x402
x402 Seller Legitimacy Check is a paid API for AI agents from apexfaucet.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Checks whether an x402 seller is real by returning its Bazaar listing count, 30-day payer and call statistics, average payer return rate, and Arc settlement data for a given host or payTo address.
Price / call$0.005
Success—
StatusUnknown
How this service works
Is this x402 seller real? Pass ?seller= with a host (api.example.com) or a payTo address (0x...). From Coinbase's own Bazaar counts (re-read every 6 hours) we return its listings, 30-day payers and calls, and the one number that separates customers from a test harness: how many times the average payer came back. For an Arc payTo we add its settlements from our full Arc x402 index: distinct payers and the top payer's share.
Output
Returns the seller's Bazaar listing count, 30-day unique payer count, 30-day call count, and average payer return frequency (the key signal distinguishing real customers from a test harness). For Arc payTo addresses, also returns the number of distinct Arc payers and the top payer's share of total settlements. Data is refreshed from Coinbase's Bazaar every 6 hours.
Example use cases
Vetting an x402 API before integrating
“Before I start using this x402 API at api.someservice.com, can you check if it's a real seller with actual paying users or just a test setup? I want to see its 30-day payer count and how often customers return.”
Checking an Arc payTo address for genuine activity
“I have a payTo address 0xAbCd1234... from an x402 marketplace listing — can you look it up and tell me how many distinct payers it has on Arc and what share the top payer holds?”
Evaluating a Bazaar-listed seller's commercial traction
“I found an x402 seller on Bazaar at api.coolprovider.xyz — can you pull its listing stats, 30-day call volume, and payer return rate so I can judge whether it has real commercial traction?”
Technical details
Endpoint
GEThttps://apexfaucet.xyz/api/x402/x402-seller-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to assess whether an x402 seller has genuine commercial activity versus being a demo or test harness, particularly before integrating or paying an x402 API. It is uniquely valuable for cross-referencing both Bazaar listing data and Arc on-chain settlement history in a single call, with the payer return rate metric being especially diagnostic.
Side effects
- Missing 'seller' query parameter returns an error
- Unknown host or address with no Bazaar or Arc data may return empty/null statistics
- Stale data if queried within 6 hours of a seller's first appearance on Bazaar
- Invalid payTo address format may return an error or no Arc results
- Rate limiting or payment failure if USDC payment is not attached
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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