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PreFlight Cross-Venue Price Check
x402
PreFlight Cross-Venue Price Check is a paid API for AI agents from meryol-agenticmarket-x402.hf.space, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Fetches cross-source token price data including median price, spread in basis points, and per-source quotes for a given token on a specified EVM chain
Price / call$0.002
Success—
StatusUnknown
How this service works
Pre-trade & pre-sign checks for autonomous agents: everything an agent verifies BEFORE signing a transaction — token due diligence, calldata red-flag decoding, oracle freshness, holder concentration, bridge routing with executable calldata, cross-venue perp funding, gas and price sanity checks. EVM chains: Ethereum, Base, Arbitrum, Optimism.
Output
Returns a JSON object with the chain name, token requested, median price in USD, spread in basis points, and an array of per-source price quotes (e.g. CoinGecko, DexScreener) with individual prices and optional notes. Useful for detecting price inconsistencies before signing a trade.
Example use cases
Example prompt
“Before I swap, check the cross-venue price of ETH on Base and tell me the median price and how wide the spread is across CoinGecko and DexScreener.”
Technical details
Endpoint
GEThttps://meryol-agenticmarket-x402.hf.space/price/cross/%7Bchain%7D/%7Btoken%7DWhen to prefer
Use this endpoint when an AI agent needs to verify a token's price across multiple venues before executing a trade or signing a transaction on an EVM chain (Ethereum, Base, Arbitrum, Optimism). Ideal for pre-trade sanity checks to detect price manipulation, stale oracles, or abnormal spreads. Prefer this over single-source price feeds when cross-venue validation and spread analysis are needed.
Side effects
- Unsupported chain or token returns an error or empty sources array
- Token not listed on one or more price sources results in partial data
- Network timeout if price feeds are slow to respond
- Invalid chain or token path parameter returns a 4xx error
- Stale or unavailable oracle data may return no sources
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"notes": [],
"sources": [
{
"note": null,
"source": "coingecko",
"price_usd": 3120.1
},
{
"note": null,
"source": "dexscreener",
"price_usd": 3121.32
}
],
"requested": "eth",
"spread_bps": 12,
"median_price_usd": 3120.45
}
}Tags
x402
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