Crypto Base Contract Inspect

{
  "data": {
    "block": {
      "hash": "0x84d697381027abac69728893f2428050d4600473cc00d7e8b8d4ea6365a3656f",
      "number": 49834076,
      "requestedTag": "safe",
      "timestamp": "2026-08-11T14:11:39+00:00"
    },
    "code": {
      "sha256": "98d785fcb1bf847f287adc2310759fd94cc13e754b974bc72131382e8266f607",
      "sizeBytes": 1852
    },
    "contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "disclaimer": "Point-in-time public Base state only. Token methods are optional and untruste...",
    "explorerUrl": "https://basescan.org/address/0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "found": true,
    "interfaces": [
      {
        "interfaceId": "0x01ffc9a7",
        "standard": "ERC-165",
        "supported": null
      }
    ],
    "network": "eip155:8453",
    "networkRequestsMade": 2,
    "readOnly": true,
    "source": "https://docs.base.org/base-chain/quickstart/connecting-to-base",
    "standardSources": {
      "ERC-1155": "https://eips.ethereum.org/EIPS/eip-1155",
      "ERC-165": "https://eips.ethereum.org/EIPS/eip-165",
      "ERC-20": "https://eips.ethereum.org/EIPS/eip-20",
      "ERC-721": "https://eips.ethereum.org/EIPS/eip-721"
    },
    "tokenMetadata": {
      "decimals": 6,
      "name": "USD Coin",
      "status": "complete",
      "symbol": "USDC",
      "totalSupplyAtomic": "4194970321976430"
    },
    "transactionBroadcast": false,
    "warnings": [
      "ERC-165 interface support was unavailable or non-standard",
      "ERC-721 interface support was unavailable or non-standard",
      "ERC-1155 interface support was unavailable or non-standard"
    ]
  },
  "meta": {
    "cached": false,
    "duration_ms": 42,
    "next_actions": [],
    "sources": [],
    "warnings": []
  },
  "request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a",
  "service": "crypto.base-contract-inspect",
  "version": "1"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://apiacre.com/v1/crypto/base-contract-inspect' \
  -H 'content-type: application/json' \
  --data-raw '{"block_tag":"safe","contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}'

# 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://apiacre.com/v1/crypto/base-contract-inspect' \
  -H 'content-type: application/json' \
  --data-raw '{"block_tag":"safe","contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}' \
  | 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 $0.005 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%2Fapiacre.com%2Fv1%2Fcrypto%2Fbase-contract-inspect&method=POST
const res = await pay("https://apiacre.com/v1/crypto/base-contract-inspect", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "block_tag": "safe",
    "contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  }),
});
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 $0.005 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://apiacre.com/v1/crypto/base-contract-inspect",
        json={
            "block_tag": "safe",
            "contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        },
    )
    print(res.status_code, res.text)