ToolVet
80trust / 100

Prove

by twin.unykorn.org in Other

x402 APIPassing, checked 2 h ago

Signed receipt (genesis402-receipt-v1) — Genesis402 / UnyKorn Operator Network

POST
https://twin.unykorn.org/prove
Price
$0.25
per call in USDC
Uptime
100%
last 30 days
Response time
151 ms
426 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/prove

Each call costs $0.25 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/prove
content-type: application/json

{
  "params": {
    "claim": "invoice 1042 existed before the dispute",
    "sha256": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
    "subject": "invoice-1042"
  }
}

Parameters

ParameterTypeRequiredDescription
paramsobjectYes

Example response

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

{
  "ok": true,
  "proofReceipt": {
    "issuer": {
      "alg": "ed25519",
      "keyId": "g402-key-<16hex>"
    },
    "receiptId": "g402_rcpt_<12hex>",
    "receiptVersion": "genesis402-receipt-v1",
    "truthLabels": [
      "ATTESTED",
      "VERIFIED"
    ]
  },
  "receipt": {
    "amount_usd": 0.25,
    "receipt_id": "g402-<16hex>",
    "tx_hash": "0x<64hex>"
  },
  "type": "prove",
  "verify": {
    "keys": "/prove/keys",
    "source": "https://github.com/FTHTrading/402-truth"
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.25.

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/prove' \
  -H 'content-type: application/json' \
  --data-raw '{"params":{"claim":"invoice 1042 existed before the dispute","sha256":"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824","subject":"invoice-1042"}}'

# 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/prove' \
  -H 'content-type: application/json' \
  --data-raw '{"params":{"claim":"invoice 1042 existed before the dispute","sha256":"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824","subject":"invoice-1042"}}' \
  | 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 $0.25 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.25" });
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 $0.25 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftwin.unykorn.org%2Fprove&method=POST
const res = await pay("https://twin.unykorn.org/prove", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "params": {
      "claim": "invoice 1042 existed before the dispute",
      "sha256": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
      "subject": "invoice-1042"
    }
  }),
});
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 $0.25 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.25"})
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/prove",
        json={
            "params": {
                "claim": "invoice 1042 existed before the dispute",
                "sha256": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
                "subject": "invoice-1042",
            },
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402195 ms$0.25
6 h agoPassed402172 ms$0.25
11 h agoPassed402258 ms$0.25
15 h agoPassed402185 ms$0.25
19 h agoPassed402324 ms$0.25
Show 10 older checks
23 h agoPassed402138 ms$0.25
27 h agoPassed402180 ms$0.25
32 h agoPassed402125 ms$0.25
36 h agoPassed402177 ms$0.25
40 h agoPassed402157 ms$0.25
44 h agoPassed402212 ms$0.25
2 days agoPassed402136 ms$0.25
2 days agoPassed402151 ms$0.25
2 days agoPassed402134 ms$0.25
3 days agoPassed402131 ms$0.25