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Ethereum ERC-20 Token Rug Check & Due Diligence
x402
Ethereum ERC-20 Token Rug Check & Due Diligence is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).
Returns a 0-100 risk score with reasons, token metadata, ownership/proxy flags, privileged bytecode functions, and Uniswap v3 market data for any ERC-20 token on Ethereum.
Price / call$0.01
Success—
StatusUnknown
How this service works
Rug check and due-diligence snapshot of an ERC-20 token on Ethereum: a 0-100 risk score with reasons, name, symbol, decimals, supply, owner and whether ownership is renounced, upgradeable-proxy detection, owner-only functions found in the bytecode (mint, pause, blacklist, fee changes), and USD price, liquidity and FDV from the deepest WETH or USDC pool on Uniswap v3. Facts only, no buy or sell opinion.
Output
A JSON object containing: a 0-100 risk score with a level (low/medium/high) and an array of scored risk reasons; token name, symbol, decimals, and total supply; owner address and whether ownership is renounced; upgradeable proxy detection; boolean flags for privileged functions (mint, pause, blacklist, fee changes, trading switch, max transaction); and Uniswap v3 market data including USD price, quote-side liquidity in USD, fully diluted value, pool address, fee tier, paired asset, and number of pools found. Also includes the current ETH/USD price from Chainlink.
Example use cases
Pre-buy token safety check
“Before I buy any of this token, can you check if 0x6B175474E89094C44Da98b954EedeAC495271d0F on Ethereum is a rug risk — I want to know the risk score, whether the owner can mint or blacklist, and if the contract is upgradeable?”
DeFi bot token filter
“Screen the Ethereum token 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 for me — give me its risk score and flags like mintable, upgradeable proxy, and blacklist capability so I can decide whether to include it in my trading strategy.”
Token liquidity and FDV lookup
“What's the current USD price, liquidity depth, and fully diluted value for the Ethereum token at 0x514910771AF9Ca656af840dff83E8264EcF986CA on its deepest Uniswap v3 pool?”
Technical details
Endpoint
GEThttps://onchaincheck.dev/eth/token?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, structured due-diligence snapshot of a specific ERC-20 token on Ethereum mainnet, combining smart-contract risk signals (ownership, upgradeability, privileged functions) with real Uniswap v3 market data in a single call. Prefer it over generic block explorers when you need a machine-readable risk score with reasons rather than raw contract data, and over on-chain RPC calls when you want Uniswap liquidity and pricing aggregated automatically. Not suitable for tokens on other chains (use the Base or Polygon siblings), for historical analysis, or for trade recommendations.
Side effects
- Invalid or malformed contract address (must match 0x + 40 hex chars) returns a 400 error
- Address is not a deployed ERC-20 contract — no token metadata returned
- No Uniswap v3 WETH or USDC pool found — noLiquidPool flag set to true, market data absent
- Contract bytecode not available (e.g., unverified or self-destructed) — privileged function detection may be incomplete
- Rate limit or payment failure for the $0.01 x402 micropayment — 402 Payment Required response
- Network timeout or RPC unavailability causes a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"name": "Uniswap",
"risk": {
"level": "low",
"score": 6,
"reasons": [
{
"code": "can-mint",
"text": "A privileged role can mint new tokens, diluting holders.",
"points": 6
}
],
"summary": "Low risk: a privileged role can mint new tokens, diluting holders. Powers are weighted down for $6.6M of liquidity."
},
"asset": {
"known": false
},
"chain": "eth",
"flags": {
"canMint": true,
"ownerCanAct": false,
"upgradeable": false,
"canBlacklist": false,
"noLiquidPool": false,
"canChangeFees": false,
"thinLiquidity": false
},
"notes": "Privileged functions are detected from bytecode selectors and may have false positives or misses. Liquidity is the WETH or USDC held by the deepest Uniswap v3 pool found.",
"owner": null,
"proxy": {
"upgradeable": false
},
"market": {
"dex": "uniswap-v3",
"pool": "0x1d42064Fc4Beb5F8aAF85F4617AE8b3b5B8Bd801",
"priceUsd": 7.19996,
"feeTierBps": 30,
"pairedWith": "WETH",
"poolsFound": 8,
"fullyDilutedValueUsd": 7200000000,
"quoteSideLiquidityUsd": 3314000
},
"symbol": "UNI",
"address": "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984",
"decimals": 18,
"nativeUsd": {
"price": 2400.09,
"source": "Chainlink ETH/USD",
"symbol": "ETH",
"updatedAt": "2026-10-23T05:33:59.000Z"
},
"totalSupply": 1000000000,
"ownershipRenounced": null,
"privilegedFunctions": {
"mint": true,
"pause": false,
"setFees": false,
"blacklist": false,
"tradingSwitch": false,
"maxTransaction": false
}
}
}Tags
x402
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