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x402 Trust & Discovery API — Seller Lookup by Wallet
x402
x402 Trust & Discovery API — Seller Lookup by Wallet is a paid API for AI agents from gkyf2bs3b4p35hwwg5zzsnejeu.srv.us, paid per call via x402, $0.03/call, status down (last checked 2026-10-02).
Returns reputation and onchain settlement data for a seller wallet address (payTo) on Base, helping agents assess whether an x402 endpoint's payee is trustworthy before sending payment.
Price / call$0.03
Success—
StatusDown
How this service works
Independent pre-purchase safety and reputation checks for x402 and MPP endpoints, plus keyless onchain data on Base. Accepts BOTH EIP-3009 and Circle Gateway credentials — only 141 of 788 Base-payable resources do, and a single-credential buyer is locked out of 53.8% of this market on one rail or 28.3% on the other. GET /v1/guard?url=&credential= answers whether the credential you carry can pay a given endpoint at all, before you try. Searching this market for "is this API endpoint a scam" returns registries and explorers but no dedicated service; that gap is what /v1/guard fills, inspecting an endpoint WITHOUT paying it and returning a go / test-with-minimum / do-not-pay verdict backed by onchain settlement history.
Output
Returns a JSON object containing onchain data about the seller wallet on Base, including settlement history, payment counts, and any available reputation signals — helping the caller assess whether the payTo address is a known, active, and trustworthy x402 recipient before making a payment.
Example use cases
Pre-payment seller vetting by agent
“My AI agent is about to pay an x402 API with payTo address 0xAbCd1234... — can you check that wallet's settlement history on Base and tell me if this seller looks legitimate before we send any USDC?”
Scam detection for unknown API seller
“I found an x402 endpoint claiming to offer weather data, and the payTo wallet is 0x9F8e7D6c... — check whether that seller wallet has any real payment history or if it looks like a scam.”
Due diligence before bulk agent payments
“We're configuring our agent fleet to auto-pay a batch of x402 APIs. Can you pull the seller reputation for wallet 0xDeadBeef... so we can decide whether to whitelist it for automated payments?”
Technical details
Endpoint
GEThttps://gkyf2bs3b4p35hwwg5zzsnejeu.srv.us/v1/seller?utm_source=zero.xyzWhen to prefer
Use this endpoint when you have a payTo wallet address from an x402 endpoint and need to assess the seller's legitimacy before spending USDC. This is the right choice when you want onchain-backed seller reputation rather than just endpoint-level safety checks, or when you want to vet a new seller wallet before adding it to an agent's auto-pay whitelist.
Side effects
- Invalid or malformed 0x wallet address returns an error
- Wallet has no onchain history — returns empty or minimal data, not an error
- Service unavailable due to Base RPC issues
- Rate limit exceeded for repeated lookups
- Wallet exists but has zero x402 settlement events — ambiguous legitimacy signal
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| payTo | string | Seller payTo wallet address (0x-prefixed). |
Output
Schema · Response
{
"type": "json",
"example": {}
}Tags
x402
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