Token

{
  "grade": "SAFE",
  "market": {
    "ageSeconds": 98000000,
    "liquidityUsd": 422000,
    "marketCapUsd": 1000000000,
    "priceUsd": 0.0000123,
    "url": "https://dexscreener.com/solana/...",
    "volume24hUsd": 350000
  },
  "one_liner": "SAFE: no red flags, $422k liquidity, 3.1 years old",
  "reasons": [
    {
      "code": "MUTABLE_METADATA",
      "severity": "info"
    }
  ],
  "sources": [
    "goplus",
    "dexscreener",
    "rugcheck"
  ],
  "token": {
    "address": "DezXAZ8z7PnrnRJjz3wXBoRgixCa6xjnB7YaB1pPB263",
    "chain": "solana",
    "name": "Bonk",
    "symbol": "Bonk"
  },
  "verdict": "green"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://presign-guard.fizzl.eu/v1/token?address=DezXAZ8z7PnrnRJjz3wXBoRgixCa6xjnB7YaB1pPB263&chain=solana'

# 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://presign-guard.fizzl.eu/v1/token?address=DezXAZ8z7PnrnRJjz3wXBoRgixCa6xjnB7YaB1pPB263&chain=solana' \
  | 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%2Fpresign-guard.fizzl.eu%2Fv1%2Ftoken
const res = await pay("https://presign-guard.fizzl.eu/v1/token?address=DezXAZ8z7PnrnRJjz3wXBoRgixCa6xjnB7YaB1pPB263&chain=solana");
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://presign-guard.fizzl.eu/v1/token?address=DezXAZ8z7PnrnRJjz3wXBoRgixCa6xjnB7YaB1pPB263&chain=solana")
    print(res.status_code, res.text)