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TradingLab Token Check
x402
TradingLab Token Check is a paid API for AI agents from tokencheck.402api.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).
Checks an ERC-20 token contract on Base mainnet for safety signals including liquidity, sell simulation, transfer taxes, and a buy/sell verdict for $0.02 USDC per call via x402.
Price / call$0.02
Success—
StatusUnknown
How this service works
Pay-per-call checks on Base, $0.02 USDC each via x402: a token safety check and an x402 seller check.
Output
Returns a JSON report with a verdict ('ok', 'caution', or 'avoid'), array of reason strings explaining the verdict, pool-level details (venue, paired token, liquidity in USD, transfer tax status, sellability), an optional sell simulation showing round-trip loss percentage and fees on the deepest pool, block number, and measurement timestamp. Errors return a plain-English error string; payments are not settled on error responses.
Example use cases
Pre-trade rug pull screening
“Before I swap into this Base token at 0x6cDcb1C4A4D1C3C6d054b27AC5B77e89eAFb971d, can you check if it's safe? I want to know the verdict, liquidity, and whether a fresh wallet can actually sell it.”
Transfer tax detection before investing
“I'm about to buy a meme token on Base at 0x74ccbe53F77b08632ce0CB91D3A545bF6B8E0979 — can you check if it has any hidden transfer taxes or honeypot mechanics I should know about?”
Automated DeFi bot safety gate
“My trading bot is about to enter a position on a Base token — run a safety check on 0xbBf71AAD6E1F8D180D3B1D898528654c1d18b2fF and only proceed if the verdict comes back as 'ok' with at least $10,000 in liquidity.”
Technical details
Endpoint
GEThttps://tokencheck.402api.dev/v1/token-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, affordable ($0.02) on-chain safety assessment of a specific Base mainnet ERC-20 token before trading, including sell simulation and transfer tax detection. Prefer this over manual on-chain analysis when you need a structured verdict with liquidity metrics in a single call. Best for DeFi bots, trading agents, or pre-swap safety gates operating on Base.
Side effects
- HTTP 400: token query parameter missing or not a valid 0x-prefixed 40-hex-digit Base address
- HTTP 503: check failed or timed out (25-second timeout); payment is not charged on errors
- Token exists but has no tracked pools, resulting in limited verdict data
- Sell simulation may not detect wallet-level transfer blocks or owner-changeable tax switches set after measurement
- Cached results may not reflect very recent on-chain changes
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"block": "52398867",
"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": [
{
"venue": "aeroV2",
"feePct": 0.3,
"source": "tracked by TradingLab",
"address": "0x6cDcb1C4A4D1C3C6d054b27AC5B77e89eAFb971d",
"sellable": {
"ok": true,
"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)",
"outUsd": 21791.869827,
"amountIn": "27317.378708653002392855",
"amountOut": "21791.869827"
},
"pairedWith": {
"symbol": "USDC",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"transferTax": {
"taxed": false,
"method": "TradingLab taxcheck job at 2026-10-08T20:25:52.000Z: receipts of the pool's 3 most recent swaps",
"samples": []
},
"liquidityUsd": 43758468,
"liquidityMethod": "2 × the pool's USDC balance (balanceOf at block 52398867); for concentrated-liquidity pools this counts all reserves, not in-range depth"
},
{
"venue": "aeroV2",
"feePct": 1,
"source": "tracked by TradingLab",
"address": "0xbBf71AAD6E1F8D180D3B1D898528654c1d18b2fF",
"sellable": {
"ok": true,
"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)",
"outUsd": null,
"amountIn": "2857.2894550549357344",
"amountOut": "103557.570587184740374855"
},
"pairedWith": {
"symbol": "fBOMB",
"address": "0x74ccbe53F77b08632ce0CB91D3A545bF6B8E0979"
},
"transferTax": {
"taxed": false,
"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"
]
},
"liquidityUsd": 4664205,
"liquidityMethod": "TradingLab registry estimate (pool added 2026-10-08, value refreshed by the registry job)"
}
],
"token": {
"name": "Aerodrome",
"chain": "base",
"method": "ERC-20 symbol()/name()/decimals()/totalSupply() eth_call at block 52398867",
"symbol": "AERO",
"address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631",
"decimals": 18,
"totalSupply": "1997645621.866174935169948746"
},
"ethUsd": 2485.34437,
"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."
],
"verdict": "ok",
"measuredAt": "2026-10-09T23:04:45.143Z",
"poolsOmitted": 29,
"sellSimulation": {
"ms": 503,
"ok": true,
"pool": "0x6cDcb1C4A4D1C3C6d054b27AC5B77e89eAFb971d",
"spent": {
"usd": 25,
"amount": "25",
"symbol": "USDC"
},
"stage": "sell",
"venue": "aeroV2",
"bought": "31.120142866883571174",
"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)",
"feesPct": 0.6,
"receivedBack": "24.850225",
"roundTripLossPct": 0.6
}
}
}Tags
x402
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