402.com.tr
Pay-per-call API marketplace on Base. Call any endpoint over HTTP; pay a USDC micro-payment via x402 (no keys, no accounts). Every payment is attributed onchain with Builder Codes.
- Underdelivered on 1 paid call(s): a real response missing promised fields, confirmed on two calls.
Grades
No purchase-based grade yet. Everything below was measured, by paying this seller or by sweeping the chain, and none of it is editorial.
Accuracy against a primary source
- accurate Gas price (Base): returned 0.005, off by +0 gwei against Base chain latest block · $0.01/call · tx
Measured 2026-08-17 by paying this seller and comparing the number it returned with a source it cannot resell. A dated sample, not a live guarantee. Full corpus at /categories.
Did it deliver what it promised?
0 of 1 endpoint we paid returned everything their own published schema promised.
- short missing 1 of 2
/api/x402/secure-token· 3,036ms · 7 bonus field(s)Real response shape
{ "service": "string", "builderCode": "string", "data": { "count": "integer", "tokens": { "array_of": "string" }, "generatedAt": "string", "receipt": { "endpoint": "string", "inputHash": "string", "policyVersion": "string" }, "returningCaller": { "callsSoFar": "integer", "cheaper": "string", "contact": "string", "note": "string" } } }Types only, verified from a real paid call. Values discarded.
This is a paid delivery check: we called the endpoint with its own advertised input and compared the response against its own advertised output. It is the one thing free probing cannot see.
Verifiable receipts
2 paid calls to this host are recorded as tamper-evident receipts, including 1 where it underdelivered. Each can be re-verified independently, from the archived bytes up.
wab_30e3fc8f7f759a1c402.com.tr
Promised 2 fields for $0.01, charged $0.01, and underdelivered: returned 1 of 2. Missing tokensCount. Shortfall confirmed on two calls.
Evidence and how to verify it yourself
The real response shape, types only, values discarded:
{
"builderCode": "string",
"data": {
"count": "integer",
"generatedAt": "string",
"receipt": {
"endpoint": "string",
"inputHash": "string",
"policyVersion": "string"
},
"returningCaller": {
"callsSoFar": "integer",
"cheaper": "string",
"contact": "string",
"note": "string"
},
"tokens": {
"array_of": "string"
}
},
"service": "string"
}Three independent checks, none needing trust in this site: integrity recomputes the id as a hash of the evidence, so any edit shows; verdict re-derives the result offline; raw re-reads the untouched bytes archived at pay time and reproduces the shape.
python3 receipts.py --verify wab_30e3fc8f7f759a1cThe full record and the format are at /receipts.
What it sells
173 endpoints listed, priced $0.0020 to $5.0000, settling on Base, Polygon.
$0.0020Restate an amount from one year in another year's money, for any country in the World Bank consumer-price series (1960$0.0020Status of a NEAR Intents swap by its deposit address: waiting for deposit, deposit seen, processing, done, refunded or$0.0020Exa's own page index, read per call — no Exa account, no subscription. Pass urls= (one, or up to 5 comma-separated) an$0.0020Turn the many ways a phone number gets typed into one E.164 string: strips spacing, brackets, the 00 international pre$0.0020🆕 What sits at a Base address: contract or plain wallet, and if a contract, whether it declares ERC-721 or ERC-1155 vi$0.0020🆕 An ERC-20 balance on Base, in raw units and in decimals, with the token's symbol and decimals resolved in the same c$0.0020🆕 The receipt for a Base transaction: success or reverted, block, gas used, effective gas price, the fee in wei and ET$0.0020🆕 A Base transaction by hash, unedited: from, to, value in wei and ETH, nonce, gas, fee caps, type, and the 4-byte met- and 165 more
Grades here come from paying this service and recording what happened, or from calling it where it is free. Settlement figures are swept daily from Base USDC Transfer logs. Nothing on this page is sponsored.