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adctx Payment Verification
x402
adctx Payment Verification is a paid API for AI agents from t.adctx.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).
Checks whether a given Base blockchain address (x402 seller payTo) has actually received on-chain payments, classifying it as paid, single-payer, self-funded, dust-only, or silent, with payer counts and USDC received.
Price / call$0.05
Success—
StatusUnknown
How this service works
Is this x402 seller actually paid? Give a payTo address, get its verdict from our own read of Base: paid, single-payer, self-funded, dust-only or silent, with the number of payers, how many of them the seller itself funded, and the USDC that arrived in a fixed window every seller is measured over. The catalogue's own call counts are not payments: across 1 397 sellers we read both ways, 312 are called and receive nothing on chain.
Output
Returns a payment verdict (paid, single-payer, self-funded, dust-only, or silent) for the queried Base address, along with the total number of unique payers, how many of those payers were the seller themselves (self-funded count), and the total USDC received within a fixed measurement window used consistently across all 1,397 sellers in the catalogue.
Example use cases
Vetting an x402 API before integrating
“Before I integrate this x402 API, can you check if the seller address 0xAbCd1234567890abcdef1234567890abcdef1234 has real paying customers on Base or if it's just the owner calling their own service?”
Filtering silent sellers from a catalogue
“I'm going through a list of x402 sellers and need to know which ones are actually receiving payments — can you check address 0xDead000000000000000000000000000000000001 and tell me if it's paid, self-funded, or silent?”
Due diligence on a crypto API marketplace listing
“We're considering listing this seller on our marketplace — can you pull the on-chain payment verdict for 0xFeed000000000000000000000000000000000002, including how many payers they've had and how much USDC arrived?”
Technical details
Endpoint
GEThttps://t.adctx.com/check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, pre-computed on-chain verdict about whether an x402 seller's payTo address has genuine external payers on Base — especially useful for filtering self-funded or inactive sellers from a marketplace or catalogue. It is purpose-built for the x402 ecosystem and uses a consistent measurement window across all sellers, making it ideal for comparative analysis rather than raw blockchain queries.
Side effects
- Invalid or malformed Ethereum address (not matching 0x + 40 hex chars) returns validation error
- Address not found in the Base chain data returns silent verdict or no-data response
- Base network read latency or unavailability may delay or fail responses
- Rate limiting or payment failure at $0.05 USDC per call may block access
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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