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Chainlink On-Chain Crypto Price Feed
x402
Chainlink On-Chain Crypto Price Feed is a paid API for AI agents from apexfaucet.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-15).
Returns real-time USD prices for up to 5 crypto tokens read directly from Chainlink price feed contracts on Ethereum, including feed address, round ID, and data age.
Price / call$0.001
Success—
StatusUnknown
How this service works
Crypto token price in USD, read on chain from Chainlink price feeds on Ethereum: pass ?symbols=ETH,BTC,SOL (up to 5) and get each price with its feed address, round id and how old the round is, so the number can be checked. Feeds are found by their public ENS names; a retired or unknown feed is refused before any charge.
Output
A JSON object mapping each requested symbol to its current USD price as read from the Chainlink price feed on Ethereum, along with the ENS-resolved feed contract address, the round ID of the latest observation, and how many seconds/minutes old that round is.
Example use cases
DeFi portfolio valuation
“Can you pull the current Chainlink on-chain prices for ETH, BTC, and SOL so I can value my DeFi portfolio right now?”
Verifiable price for smart contract
“I need the current Chainlink feed price for ETH in USD along with the round ID and feed address so I can verify it matches what my smart contract is using.”
Multi-token price alert check
“Fetch the live on-chain prices for BTC, ETH, and LINK from Chainlink and tell me how stale each reading is — I want to make sure the data is fresh before I act on it.”
Technical details
Endpoint
GEThttps://apexfaucet.xyz/api/x402/crypto-price?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need on-chain-verifiable crypto prices backed by Chainlink's decentralized oracle network, especially when auditability (feed address + round ID) matters — e.g. for DeFi integrations, smart contract validation, or any scenario requiring a trustless price source. Prefer it over off-chain exchange APIs when provenance and freshness verification are required. Supports batch lookups of up to 5 symbols per call at $0.001 USDC each.
Side effects
- Unknown or retired Chainlink feed symbol — request refused before any charge with an error indicating the feed does not exist
- More than 5 symbols requested — validation error returned
- Malformed symbols query (wrong format or disallowed characters) — 400-level error
- Chainlink feed temporarily unresponsive or stale on-chain — may return an error or elevated round age
- Network congestion on Ethereum causing slow or failed on-chain reads
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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