{ "x402Version": 2, "id": 36445, "slug": "36445", "resource": "https://tokencheck.402api.dev/v1/token-check", "description": "Call before buying, swapping into or accepting any Base ERC-20, to learn if you can sell it back. $0.02, ~1-3 s, measured on-chain: honeypot test (simulated buy then sell via the deepest pool: sell ok? round-trip loss vs fees), per-pool transfer tax from real recent swap receipts, USD liquidity per pool (Uniswap v2/v3, Aerodrome, Slipstream), sell quotes, and an ok/caution/avoid verdict citing each fact. Errors: 400/503 JSON {error}, not charged.", "type": "http", "serviceName": "TradingLab Token Check", "resourceType": "Market Data", "accepts": [ { "scheme": "exact", "network": "eip155:8453", "payTo": "0x8C8A81E2acEc6ed62421f1f4E7125B0b84FFffdE", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "20000", "amountUsd": 0.02, "maxTimeoutSeconds": 300 } ], "outputSchema": { "properties": { "example": { "oneOf": [ { "description": "HTTP 200: the token report", "properties": { "block": { "type": "string" }, "cached": { "type": "boolean" }, "ethUsd": { "type": [ "number", "null" ] }, "measuredAt": { "type": "string" }, "notes": { "items": { "type": "string" }, "type": "array" }, "pools": { "items": { "description": "venue, pairedWith, feePct, liquidityUsd, transferTax, sellable", "type": "object" }, "type": "array" }, "poolsOmitted": { "type": "integer" }, "reasons": { "items": { "type": "string" }, "type": "array" }, "sellSimulation": { "description": "eth_simulateV1 buy-then-sell on the deepest pool: ok, roundTripLossPct, feesPct, error", "type": [ "object", "null" ] }, "token": { "type": "object" }, "verdict": { "enum": [ "ok", "caution", "avoid" ] } }, "required": [ "token", "verdict", "reasons", "pools", "measuredAt" ], "type": "object" }, { "description": "Error body. HTTP 400 = bad or missing input; HTTP 503 = check failed or timed out (25 s). The payment is not settled on errors, so the caller is not charged.", "example": { "error": "query parameter `token` must be a 0x-prefixed 40-hex-digit Base token address" }, "properties": { "error": { "description": "What went wrong, in plain words", "type": "string" } }, "required": [ "error" ], "type": "object" } ], "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" }, "extensions": { "bazaar": { "info": { "input": { "discoverable": true, "method": "GET", "queryParams": { "token": "0x940181a94A35A4569E4529A3CDfB74e38FD98631" }, "type": "http" }, "output": { "example": { "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 $25 buy then full sell on the aeroV2 USDC pool lost 0.6% (pool fees account for 0.6%): sells work and no meaningful tax." ], "sellSimulation": { "bought": "31.120142866883571174", "feesPct": 0.6, "method": "eth_simulateV1 at block 52398867: a fresh address funded by state override spends 25 USDC buying through aeroV2 router 0xcF77a3Ba9A5CA399B7c97c74d54e5b1Beb874E43, then sells every token it received back into the same pool (nothing is signed or broadcast)", "ms": 503, "ok": true, "pool": "0x6cDcb1C4A4D1C3C6d054b27AC5B77e89eAFb971d", "receivedBack": "24.850225", "roundTripLossPct": 0.6, "spent": { "amount": "25", "symbol": "USDC", "usd": 25 }, "stage": "sell", "venue": "aeroV2" }, "token": { "address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631", "chain": "base", "decimals": 18, "method": "ERC-20 symbol()/name()/decimals()/totalSupply() eth_call at block 52398867", "name": "Aerodrome", "symbol": "AERO", "totalSupply": "1997645621.866174935169948746" }, "verdict": "ok" }, "type": "json" } }, "schema": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "input": { "additionalProperties": false, "properties": { "discoverable": { "const": true }, "method": { "enum": [ "GET" ], "type": "string" }, "queryParams": { "properties": { "token": { "description": "ERC-20 token contract address on Base mainnet", "pattern": "^0x[0-9a-fA-F]{40}$", "type": "string" } }, "required": [ "token" ], "type": "object" }, "type": { "const": "http", "type": "string" } }, "required": [ "type", "method" ], "type": "object" }, "output": { "properties": { "example": { "oneOf": [ { "description": "HTTP 200: the token report", "properties": { "block": { "type": "string" }, "cached": { "type": "boolean" }, "ethUsd": { "type": [ "number", "null" ] }, "measuredAt": { "type": "string" }, "notes": { "items": { "type": "string" }, "type": "array" }, "pools": { "items": { "description": "venue, pairedWith, feePct, liquidityUsd, transferTax, sellable", "type": "object" }, "type": "array" }, "poolsOmitted": { "type": "integer" }, "reasons": { "items": { "type": "string" }, "type": "array" }, "sellSimulation": { "description": "eth_simulateV1 buy-then-sell on the deepest pool: ok, roundTripLossPct, feesPct, error", "type": [ "object", "null" ] }, "token": { "type": "object" }, "verdict": { "enum": [ "ok", "caution", "avoid" ] } }, "required": [ "token", "verdict", "reasons", "pools", "measuredAt" ], "type": "object" }, { "description": "Error body. HTTP 400 = bad or missing input; HTTP 503 = check failed or timed out (25 s). The payment is not settled on errors, so the caller is not charged.", "example": { "error": "query parameter `token` must be a 0x-prefixed 40-hex-digit Base token address" }, "properties": { "error": { "description": "What went wrong, in plain words", "type": "string" } }, "required": [ "error" ], "type": "object" } ], "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" } }, "required": [ "input" ], "type": "object" } } }, "tags": [ "token", "base", "honeypot", "transfer-tax", "liquidity", "bazaar" ], "sourceHost": "tokencheck.402api.dev", "lastUpdated": "2026-10-10T10:19:21.821Z", "quality": { "calls30d": 2, "uniquePayers30d": 1, "lastCalledAt": "2026-10-10T10:19:21.163Z" }, "metadata": { "serviceName": "TradingLab Token Check", "extensions": { "bazaar": { "info": { "input": { "discoverable": true, "method": "GET", "queryParams": { "token": "0x940181a94A35A4569E4529A3CDfB74e38FD98631" }, "type": "http" }, "output": { "example": { "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 $25 buy then full sell on the aeroV2 USDC pool lost 0.6% (pool fees account for 0.6%): sells work and no meaningful tax." ], "sellSimulation": { "bought": "31.120142866883571174", "feesPct": 0.6, "method": "eth_simulateV1 at block 52398867: a fresh address funded by state override spends 25 USDC buying through aeroV2 router 0xcF77a3Ba9A5CA399B7c97c74d54e5b1Beb874E43, then sells every token it received back into the same pool (nothing is signed or broadcast)", "ms": 503, "ok": true, "pool": "0x6cDcb1C4A4D1C3C6d054b27AC5B77e89eAFb971d", "receivedBack": "24.850225", "roundTripLossPct": 0.6, "spent": { "amount": "25", "symbol": "USDC", "usd": 25 }, "stage": "sell", "venue": "aeroV2" }, "token": { "address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631", "chain": "base", "decimals": 18, "method": "ERC-20 symbol()/name()/decimals()/totalSupply() eth_call at block 52398867", "name": "Aerodrome", "symbol": "AERO", "totalSupply": "1997645621.866174935169948746" }, "verdict": "ok" }, "type": "json" } }, "schema": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "input": { "additionalProperties": false, "properties": { "discoverable": { "const": true }, "method": { "enum": [ "GET" ], "type": "string" }, "queryParams": { "properties": { "token": { "description": "ERC-20 token contract address on Base mainnet", "pattern": "^0x[0-9a-fA-F]{40}$", "type": "string" } }, "required": [ "token" ], "type": "object" }, "type": { "const": "http", "type": "string" } }, "required": [ "type", "method" ], "type": "object" }, "output": { "properties": { "example": { "oneOf": [ { "description": "HTTP 200: the token report", "properties": { "block": { "type": "string" }, "cached": { "type": "boolean" }, "ethUsd": { "type": [ "number", "null" ] }, "measuredAt": { "type": "string" }, "notes": { "items": { "type": "string" }, "type": "array" }, "pools": { "items": { "description": "venue, pairedWith, feePct, liquidityUsd, transferTax, sellable", "type": "object" }, "type": "array" }, "poolsOmitted": { "type": "integer" }, "reasons": { "items": { "type": "string" }, "type": "array" }, "sellSimulation": { "description": "eth_simulateV1 buy-then-sell on the deepest pool: ok, roundTripLossPct, feesPct, error", "type": [ "object", "null" ] }, "token": { "type": "object" }, "verdict": { "enum": [ "ok", "caution", "avoid" ] } }, "required": [ "token", "verdict", "reasons", "pools", "measuredAt" ], "type": "object" }, { "description": "Error body. HTTP 400 = bad or missing input; HTTP 503 = check failed or timed out (25 s). The payment is not settled on errors, so the caller is not charged.", "example": { "error": "query parameter `token` must be a 0x-prefixed 40-hex-digit Base token address" }, "properties": { "error": { "description": "What went wrong, in plain words", "type": "string" } }, "required": [ "error" ], "type": "object" } ], "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" } }, "required": [ "input" ], "type": "object" } } } }, "liveness": { "reliability": null }, "verified": false, "featured": false, "provider": { "host": "tokencheck.402api.dev", "manifest_name": "tokencheck.402api.dev", "source": "cdp-mirror", "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources", "submitted_at": "2026-10-14T01:15:01.050Z" }, "exampleResponse": { "example": {}, "type": "string" } }