Jpyc Activity

{
  "chain": "polygon",
  "chainId": 137,
  "contract": "0xE7C3D8C9a439feDe00D2600032D5dB0Be71C3c29",
  "definitions": {
    "countUnit": "events",
    "eligible": "positive-value transfers with distinct sender and receiver, excluding the zero address",
    "median": "floored atomic average for even counts"
  },
  "expiresAt": "2026-09-08T06:59:58.000Z",
  "fromBlock": "92343600",
  "fromTimestamp": "2026-09-07T03:00:00.000Z",
  "generatedAt": "2026-09-08T03:20:00.000Z",
  "medianTransfer": "1000000000000000000",
  "medianTransferFormatted": "1",
  "notice": "onchain-facts-only",
  "observedAt": "2026-09-08T02:59:58.000Z",
  "schemaVersion": "2.2",
  "termsUrl": "https://open-pay.jp/en/terms",
  "toBlock": "92386799",
  "toTimestamp": "2026-09-08T02:59:58.000Z",
  "token": {
    "decimals": 18,
    "symbol": "JPYC"
  },
  "topReceivers": [
    {
      "address": "0x52d4901142e2b5680027da5eb47c86cb02a3ca81",
      "count": 1,
      "volume": "1000000000000000000",
      "volumeFormatted": "1"
    }
  ],
  "transferCount": 1,
  "uniqueReceivers": 1,
  "uniqueSenders": 1,
  "volume": "1000000000000000000",
  "volumeFormatted": "1",
  "window": "24h"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://open-pay.jp/api/paid/usdc/jpyc/activity?chain=polygon&window=24h'

# 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 - 'https://open-pay.jp/api/paid/usdc/jpyc/activity?chain=polygon&window=24h' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fopen-pay.jp%2Fapi%2Fpaid%2Fusdc%2Fjpyc%2Factivity
const res = await pay("https://open-pay.jp/api/paid/usdc/jpyc/activity?chain=polygon&window=24h");
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://open-pay.jp/api/paid/usdc/jpyc/activity?chain=polygon&window=24h")
    print(res.status_code, res.text)