Token Risk Preflight

{
  "capability": "token.risk-preflight",
  "data": {
    "address": "example",
    "cache_age_ms": 0,
    "chain": "ethereum",
    "chain_id": 1,
    "classification": "clear_evidence",
    "facts": {
      "blacklist_capability": false,
      "buy_tax": "example",
      "cannot_buy": false,
      "cannot_sell_all": false,
      "hidden_owner": false,
      "honeypot": false,
      "mintable": false,
      "open_source": false,
      "owner_address": "example",
      "owner_change_balance": false,
      "ownership_reclaimable": false,
      "proxy": false,
      "sell_tax": "example",
      "slippage_modifiable": false,
      "transfer_pausable": false
    },
    "freshness": "current_upstream_snapshot",
    "reason_codes": [],
    "safe_guarantee": false,
    "source": "GoPlus Token Security API",
    "source_kind": "third_party_security_evidence",
    "trading_recommendation": false,
    "transaction_broadcast": false,
    "transaction_simulated": false,
    "unknown_fields": []
  },
  "meta": {
    "cache": "miss",
    "checked_at": "2026-01-01T00:00:00.000Z",
    "duration_ms": 0,
    "provider": "goplus-token-security"
  },
  "ok": true,
  "version": "1"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/token/risk-preflight' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0x4200000000000000000000000000000000000006","chain":"base"}'

# 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://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/token/risk-preflight' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0x4200000000000000000000000000000000000006","chain":"base"}' \
  | 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 $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
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 $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fhttp--forest-gas-station-mainnet--lcjl27p8lmjs.code.run%2Ftoken%2Frisk-preflight&method=POST
const res = await pay("https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/token/risk-preflight", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "0x4200000000000000000000000000000000000006",
    "chain": "base"
  }),
});
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 $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/token/risk-preflight",
        json={
            "address": "0x4200000000000000000000000000000000000006",
            "chain": "base",
        },
    )
    print(res.status_code, res.text)