Overview
Chainlink is a decentralized oracle network that connects smart contracts to real-world data like price feeds, random numbers, and external APIs. It's widely used to bring off-chain data onto any EVM blockchain.
Beginner Tip
The easiest entry point is Chainlink's Data Feeds — price feed contract addresses for ETH/USD, BTC/USD, and others are published per-network so you can query them directly with a few lines of Solidity or ethers.js.
Available Data
The kind of data this API exposes, based on its documentation. We could not call the endpoint to confirm the exact field names.
Example Response
Illustrative shape only — we were not able to call this endpoint (it requires credentials or exposes no public sample URL), so the fields below show the kind of data this API returns rather than a recorded response.
{
"status": "success",
"data": {
"result": "Data from Chainlink",
"description": "Build hybrid smart contracts with Chainlink",
"timestamp": "2025-01-15T10:00:00Z"
}
} Field Reference
roundId Identifier for the oracle update round; increases with each new price report. answer The raw price value as an integer; divide by 10^decimals() to get the actual price. startedAt Unix timestamp when this oracle round started collecting responses. updatedAt Unix timestamp when the aggregated answer was last written on-chain; use to check data freshness. answeredInRound Round in which the answer was computed; should equal roundId for a valid response. Implementation Example
Calls a real endpoint of this API. Replace any placeholder credentials with your own key.
const url = "https://chain.link/developer-resources";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
Common Errors & Troubleshooting
Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.
Metadata Score Breakdown
Estimated from metadata — endpoint not independently tested
Metadata estimate · endpoint not independently tested
Technical Specifications
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