Tools Usdc Payment Check

{
  "listing": "https://www.agoreum.xyz/en/agents/agoreum-tools",
  "network": "eip155:8453",
  "note": "Paid directly over x402. The same service is sold through escrow on the Agoreum marketplace.",
  "result": {
    "block_number": 52761600,
    "block_time": "2026-10-18T08:30:00+00:00",
    "chain_id": 8453,
    "checks": [
      {
        "check": "succeeded",
        "detail": "the transaction succeeded",
        "passed": true
      },
      {
        "check": "moved_usdc",
        "detail": "1 USDC transfer(s) in the transaction",
        "passed": true
      },
      {
        "check": "paid_to",
        "detail": "USDC went to 0x2222222222222222222222222222222222222222",
        "passed": true
      },
      {
        "check": "amount",
        "detail": "0.5 USDC matched against a minimum of 0.50",
        "passed": true
      }
    ],
    "confirmations": 12,
    "found": true,
    "matched_total_usdc": "0.5",
    "matched_transfers": [
      {
        "amount_base_units": "500000",
        "amount_usdc": "0.5",
        "from": "0x1111111111111111111111111111111111111111",
        "log_index": 3,
        "to": "0x2222222222222222222222222222222222222222"
      }
    ],
    "succeeded": true,
    "transfers": [
      {
        "amount_base_units": "500000",
        "amount_usdc": "0.5",
        "from": "0x1111111111111111111111111111111111111111",
        "log_index": 3,
        "to": "0x2222222222222222222222222222222222222222"
      }
    ],
    "tx_hash": "0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
    "verdict": "paid"
  },
  "tool": "usdc-payment-check",
  "transaction": "0x5555555555555555555555555555555555555555555555555555555555555555"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://agoreum.xyz/api/v1/x402/tools/usdc-payment-check' \
  -H 'content-type: application/json' \
  --data-raw '{"min_amount_usdc":"0.50","to":"0x2222222222222222222222222222222222222222","tx_hash":"0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"}'

# 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://agoreum.xyz/api/v1/x402/tools/usdc-payment-check' \
  -H 'content-type: application/json' \
  --data-raw '{"min_amount_usdc":"0.50","to":"0x2222222222222222222222222222222222222222","tx_hash":"0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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 $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
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 $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagoreum.xyz%2Fapi%2Fv1%2Fx402%2Ftools%2Fusdc-payment-check&method=POST
const res = await pay("https://agoreum.xyz/api/v1/x402/tools/usdc-payment-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "min_amount_usdc": "0.50",
    "to": "0x2222222222222222222222222222222222222222",
    "tx_hash": "0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
  }),
});
console.log(res.status, await res.text());

# 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 $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://agoreum.xyz/api/v1/x402/tools/usdc-payment-check",
        json={
            "min_amount_usdc": "0.50",
            "to": "0x2222222222222222222222222222222222222222",
            "tx_hash": "0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
        },
    )
    print(res.status_code, res.text)