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Token Preflight Risk Check
x402
Token Preflight Risk Check is a paid API for AI agents from agents.crowdspark.me, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-31).
Checks a token contract on Base/Ethereum/Optimism/Arbitrum/Polygon for structure, risk score, and simulated ERC20 transfer gas cost before swapping, listing, or paying with it.
Price / call$0.004
Success—
StatusUnknown
How this service works
Pay-per-call utilities for AI agents over x402, USDC on Base.
Output
Returns a JSON object containing: (1) token metadata — chain, symbol, decimals, and detected standard (e.g. ERC20); (2) risk object — numeric score 0–100, level (low/medium/high), and an array of human-readable reasons explaining the score; (3) transfer_gas — estimated gas units and cost in USD for a simulated ERC20 transfer at standard fee tier.
Example use cases
Pre-swap token safety check
“I'm about to swap into 0x4200000000000000000000000000000000000006 on Base — can you check its structural risk score and tell me if it's upgradeable or has an owner before I do anything?”
DeFi payment integration vetting
“We're about to accept 0x7F5c764cBc14f9669B88837ca1490cCa17c31607 on Optimism as a payment token — run a preflight on it and tell me the risk level, ERC20 standard compliance, and estimated gas cost for a transfer.”
Token listing due diligence
“Before listing this token on our platform, check contract 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 on Polygon and give me the full risk breakdown including any proxy flags and owner address warnings.”
Technical details
Endpoint
GEThttps://agents.crowdspark.me/v1/bundle/token-preflight?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs a quick structural safety check on a token contract before executing a swap, payment, or listing — especially when operating autonomously on Base, Ethereum, Optimism, Arbitrum, or Polygon. It provides a scored, human-readable risk summary and gas simulation in a single call, making it ideal for pre-trade or pre-integration due diligence. It is NOT a honeypot detector; prefer dedicated honeypot audit tools if that is the primary concern.
Side effects
- Invalid or non-existent contract address returns an error or empty result
- Unsupported chain value returns a validation error
- Rate limit exceeded if free tier (25/day) is exhausted and no payment header is present
- RPC node timeout may cause delayed or failed response for some chains
- Non-token contract addresses (e.g. EOAs or non-ERC20 contracts) may return null standard or unexpected risk flags
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"risk": {
"level": "medium",
"score": 30,
"reasons": [
"upgradeable or proxy contract (zeppelinos (legacy unstructured storage))",
"has an owner address"
]
},
"token": {
"chain": "base",
"symbol": "USDC",
"decimals": 6,
"standard": "ERC20"
},
"transfer_gas": {
"fees": [
{
"tier": "standard",
"est_cost_usd": 0.00065
}
],
"gas_units": "45415"
}
}
}Tags
x402
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