Token Check

{
  "block": "52398867",
  "ethUsd": 2485.34437,
  "measuredAt": "2026-10-09T23:04:45.143Z",
  "notes": [
    "16 smaller pool(s) omitted.",
    "5 pool(s) with under $1,000 measured liquidity omitted.",
    "Measured facts, not advice. The simulated sell shows a fresh wallet can sell right now; owner-changeable taxes, blacklists or trading switches can still change later."
  ],
  "pools": [
    {
      "address": "0x6cDcb1C4A4D1C3C6d054b27AC5B77e89eAFb971d",
      "feePct": 0.3,
      "liquidityMethod": "2 × the pool's USDC balance (balanceOf at block 52398867); for concentrated-liquidity pools this counts all reserves, not in-range depth",
      "liquidityUsd": 43758468,
      "pairedWith": {
        "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "symbol": "USDC"
      },
      "sellable": {
        "amountIn": "27317.378708653002392855",
        "amountOut": "21791.869827",
        "method": "on-chain quoter/reserves eth_call selling 0.1% of the pool's token balance into this pool (does not detect wallet-level transfer blocks or the tax itself)",
        "ok": true,
        "outUsd": 21791.869827
      },
      "source": "tracked by TradingLab",
      "transferTax": {
        "method": "TradingLab taxcheck job at 2026-10-08T20:25:52.000Z: receipts of the pool's 3 most recent swaps",
        "samples": [],
        "taxed": false
      },
      "venue": "aeroV2"
    },
    {
      "address": "0xbBf71AAD6E1F8D180D3B1D898528654c1d18b2fF",
      "feePct": 1,
      "liquidityMethod": "TradingLab registry estimate (pool added 2026-10-08, value refreshed by the registry job)",
      "liquidityUsd": 4664205,
      "pairedWith": {
        "address": "0x74ccbe53F77b08632ce0CB91D3A545bF6B8E0979",
        "symbol": "fBOMB"
      },
      "sellable": {
        "amountIn": "2857.2894550549357344",
        "amountOut": "103557.570587184740374855",
        "method": "on-chain quoter/reserves eth_call selling 0.1% of the pool's token balance into this pool (does not detect wallet-level transfer blocks or the tax itself)",
        "ok": true,
        "outUsd": null
      },
      "source": "tracked by TradingLab",
      "transferTax": {
        "method": "receipts of the pool's 2 most recent swap(s) found by eth_getLogs (Swap event) over the last 500 blocks: does part of a AERO transfer out of / payment into the pool go to the token contract or a burn address?",
        "samples": [
          "0x0bfd8e34e528e56ee56cd480722025c2f149d87152e1a6b2e209cc4b30f97b7d",
          "0x8ae22c6b10bdfd766ae7c09cc0c6ed2a55b001e4835524cd8e3597207f587608"
        ],
        "taxed": false
      },
      "venue": "aeroV2"
    }
  ],
  "poolsOmitted": 29,
  "reasons": [
    "Total measured liquidity $66,630,326 across 10 pool(s).",
    "Sell quote succeeded on all 6 pool(s) checked.",
    "No transfer tax seen in recent swaps on 5 pool(s).",
    "Simulated $25 buy then full sell on the aeroV2 USDC pool lost 0.6% (pool fees account for 0.6%): sells work and no meaningful tax."
  ],
  "sellSimulation": {
    "bought": "31.120142866883571174",
    "feesPct": 0.6,
    "method": "eth_simulateV1 at block 52398867: a fresh address funded by state override spends 25 USDC buying through aeroV2 router 0xcF77a3Ba9A5CA399B7c97c74d54e5b1Beb874E43, then sells every token it received back into the same pool (nothing is signed or broadcast)",
    "ms": 503,
    "ok": true,
    "pool": "0x6cDcb1C4A4D1C3C6d054b27AC5B77e89eAFb971d",
    "receivedBack": "24.850225",
    "roundTripLossPct": 0.6,
    "spent": {
      "amount": "25",
      "symbol": "USDC",
      "usd": 25
    },
    "stage": "sell",
    "venue": "aeroV2"
  },
  "token": {
    "address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631",
    "chain": "base",
    "decimals": 18,
    "method": "ERC-20 symbol()/name()/decimals()/totalSupply() eth_call at block 52398867",
    "name": "Aerodrome",
    "symbol": "AERO",
    "totalSupply": "1997645621.866174935169948746"
  },
  "verdict": "ok"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://tokencheck.402api.dev/v1/token-check?token=0x940181a94A35A4569E4529A3CDfB74e38FD98631'

# 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://tokencheck.402api.dev/v1/token-check?token=0x940181a94A35A4569E4529A3CDfB74e38FD98631' \
  | 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%2Ftokencheck.402api.dev%2Fv1%2Ftoken-check
const res = await pay("https://tokencheck.402api.dev/v1/token-check?token=0x940181a94A35A4569E4529A3CDfB74e38FD98631");
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://tokencheck.402api.dev/v1/token-check?token=0x940181a94A35A4569E4529A3CDfB74e38FD98631")
    print(res.status_code, res.text)