Check

{
  "address": "0x8004a169fb4a3325136eb29fa0ceb6d2e539a432",
  "agent_likeness": {
    "score": 5,
    "signals": [
      "contract / smart account on BSC"
    ],
    "verdict": "no_agent_signals"
  },
  "chain": "bsc",
  "chain_facts": {
    "base": {
      "is_contract": true,
      "nonce": 1
    },
    "bsc": {
      "bnb": 0,
      "is_contract": true,
      "nonce": 1
    }
  },
  "erc8004": {
    "crawled_matches": [],
    "index_size": 38000,
    "nfts_owned": 0,
    "registry": "0x8004A169FB4a3325136EB29fA0ceB6D2e539a432"
  },
  "flapjax": {
    "balance": 0,
    "holder": false,
    "pct_supply": 0,
    "token": "0x90c8889f428F9Ebb77BB8f15CAD3a50a9aC680df"
  },
  "ms": 1800,
  "sybil": {
    "cluster_flag": "none",
    "cluster_size": 1,
    "first_funded_block": 46000000,
    "first_funder": "0x4e59b44847b379578588920ca78fbf26c0b4956c",
    "flags": [],
    "peers_sample": []
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://flapjaxcheck.shares.zrok.io/check?address=0x8004A169FB4a3325136EB29fA0ceB6D2e539a432'

# 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://flapjaxcheck.shares.zrok.io/check?address=0x8004A169FB4a3325136EB29fA0ceB6D2e539a432' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fflapjaxcheck.shares.zrok.io%2Fcheck
const res = await pay("https://flapjaxcheck.shares.zrok.io/check?address=0x8004A169FB4a3325136EB29fA0ceB6D2e539a432");
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://flapjaxcheck.shares.zrok.io/check?address=0x8004A169FB4a3325136EB29fA0ceB6D2e539a432")
    print(res.status_code, res.text)