ToolVet
81trust / 100

Verify Receipt

by twin.unykorn.org in Security & trust

x402 APIPassing, checked 2 h ago

Verify a genesis402 signed receipt — signature and hash-chain position — Genesis402 / UnyKorn Operator Network

POST
https://twin.unykorn.org/verify-receipt
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
166 ms
733 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://twin.unykorn.org/verify-receipt

Each call costs $0.005 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://twin.unykorn.org/verify-receipt
content-type: application/json

{
  "params": {
    "receiptId": "g402_rcpt_0a1b2c3d4e5f"
  }
}

Parameters

ParameterTypeRequiredDescription
paramsobjectYes

Example response

The provider's example. We can't check it without paying.

{
  "chain": {
    "anchor": "UNANCHORED",
    "receipts_on_chain": 3
  },
  "found": true,
  "issuer": {
    "alg": "ed25519",
    "keyId": "g402-key-<16hex>"
  },
  "ok": true,
  "receipt": {
    "receiptVersion": "genesis402-receipt-v1",
    "seq": 3,
    "sha256": "<64hex>",
    "truthLabels": [
      "ATTESTED",
      "VERIFIED"
    ]
  },
  "signature_valid": true,
  "type": "verify-receipt",
  "verdict": "valid"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://twin.unykorn.org/verify-receipt' \
  -H 'content-type: application/json' \
  --data-raw '{"params":{"receiptId":"g402_rcpt_0a1b2c3d4e5f"}}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://twin.unykorn.org/verify-receipt' \
  -H 'content-type: application/json' \
  --data-raw '{"params":{"receiptId":"g402_rcpt_0a1b2c3d4e5f"}}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftwin.unykorn.org%2Fverify-receipt&method=POST
const res = await pay("https://twin.unykorn.org/verify-receipt", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "params": {
      "receiptId": "g402_rcpt_0a1b2c3d4e5f"
    }
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://twin.unykorn.org/verify-receipt",
        json={
            "params": {
                "receiptId": "g402_rcpt_0a1b2c3d4e5f",
            },
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402241 ms$0.005
7 h agoPassed402404 ms$0.005
11 h agoPassed402154 ms$0.005
16 h agoPassed402166 ms$0.005
20 h agoPassed402499 ms$0.005
Show 10 older checks
24 h agoPassed402235 ms$0.005
28 h agoPassed402416 ms$0.005
33 h agoPassed402181 ms$0.005
37 h agoPassed402143 ms$0.005
41 h agoPassed402202 ms$0.005
45 h agoPassed402638 ms$0.005
2 days agoPassed402148 ms$0.005
2 days agoPassed402490 ms$0.005
2 days agoPassed402124 ms$0.005
3 days agoPassed402127 ms$0.005