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PreFlight Oracle Freshness Check
x402
PreFlight Oracle Freshness 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).
Checks whether a Chainlink or on-chain price feed is fresh and safe to use before an agent signs a transaction dependent on that oracle price.
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 the oracle feed's current scaled price, description (e.g. 'ETH / USD'), decimal precision, last update timestamp, staleness in seconds, a boolean is_safe_to_use flag, and any notes flagging issues — all in one JSON object.
Example use cases
Example prompt
“Before I execute this ETH/USD trade on Base, can you check whether the ETH/USD Chainlink feed at 0x71041dddad3595f9ced3dccfbe3d1f4b0a16bb70 is fresh and safe to use right now?”
Technical details
Endpoint
GEThttps://meryol-agenticmarket-x402.hf.space/oracle/freshness/%7Bchain%7D/%7Bfeed%7DWhen to prefer
Use this endpoint when an agent needs to verify that an on-chain price oracle is fresh and reliable before signing any transaction that depends on that price — especially on EVM chains like Ethereum, Base, Arbitrum, or Optimism. Prefer this over generic price-fetch endpoints when the agent's primary concern is oracle liveness and staleness risk, not just the price value itself.
Side effects
- Invalid chain identifier returns 404 or error response
- Unknown or unsupported feed address returns error
- Feed address exists but has never updated — staleness could be very large
- Network timeout if the RPC node is unavailable
- Stale feed flagged as is_safe_to_use: false with high staleness_seconds
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"feed": "0x71041dddad3595f9ced3dccfbe3d1f4b0a16bb70",
"chain": "base",
"notes": [],
"decimals": 8,
"description": "ETH / USD",
"answer_scaled": 3120.45,
"updated_at_ts": 1715000000,
"is_safe_to_use": true,
"staleness_seconds": 120
}
}Tags
x402
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