Decentralized finance depends on accurate price oracles to ensure reliable smart contract operations. Chainlink, a leading decentralized oracle network, bridges blockchains with off-chain data via price feeds. This study quantifies Chainlink’s accuracy by comparing its price feeds across eight networks to centralized exchanges for two trading pairs, using mean absolute percentage error analysis and descriptive statistics. The results reveal performance variability. For instance, Polygon achieves high accuracy, while Ethereum and ZKsync exhibit greater deviations under market volatility. The study discusses trade-offs between threshold and heartbeat configurations, emphasizing their complementary roles in balancing accuracy and efficiency. In addition, arbitrage implications and inefficiencies are identified.