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Saylor Innovations Data Desk – Chainlink Price Feed
x402
Saylor Innovations Data Desk – Chainlink Price Feed is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-27).
Reads Chainlink on-chain price feeds for any supported pair across 7 blockchains, returning price, round ID, update timestamp, age, heartbeat, deviation threshold, and a stale/fresh verdict
Price / call$0.01
Success—
StatusUnknown
How this service works
Chainlink price feed read on-chain for any pair on 7 chains - price, round id, last update and age, heartbeat, deviation threshold and a stale or fresh verdict
Output
A JSON object containing the feed pair label, current price, chain name, round ID, updated_at timestamp, age in seconds, heartbeat in seconds, deviation threshold percentage, proxy contract address, token decimals, asset class, data source, and a stale-or-fresh status verdict.
Example use cases
Pre-trade oracle freshness check
“Before I execute this DeFi trade, can you check the Chainlink BTC/USD feed on Arbitrum and tell me if it's stale or fresh, and what the current price and age are?”
Multi-chain price comparison
“Fetch the ETH/USD Chainlink price on both Ethereum mainnet and Base so I can compare what the oracle is reporting on each chain right now.”
Monitoring oracle heartbeat health
“Check the Chainlink LINK/USD feed on Polygon — what's the heartbeat window, how old is the last update, and does it fall within the deviation threshold?”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/chainlink/price?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative on-chain Chainlink oracle data including staleness metadata (heartbeat, deviation threshold, age, stale/fresh verdict) across multiple EVM chains. It is superior to simple price APIs when DeFi safety checks require verifying oracle freshness before executing trades, liquidations, or collateral valuations. Prefer it over off-chain price aggregators when you specifically need to reflect what a smart contract would see from its Chainlink feed.
Side effects
- Unsupported feed pair for the requested chain returns an error or empty result
- Invalid chain name defaults to Ethereum or may return an error
- Feed pair not yet supported on a specific chain yields a not-found response
- Network or on-chain RPC latency may occasionally cause timeouts
- Missing required 'feed' query parameter causes a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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