API3 | Quantum Random Numbers
API3 and The Australian National University quantum
optics group bring truly random numbers based on quantum mechanics to smart contracts at no charge.
All you pay for is gas.
reality.eth - Crowd-sourced verification for smart contracts
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Blockchain Oracles for Hybrid Smart Contracts | Chainlink
Chainlink is the most widely used oracle network for powering hybrid smart contracts, enabling any blockchain to securely access off-chain data & computations.
Band Protocol - Cross-Chain Data Oracle
Band Protocol is a cross-chain data oracle platform that aggregates and connects real-world data and APIs to smart contracts.
Aleph.im decentralized infrastructure
Off-chain