Blockchain Oracle

Data on decentralized blockchain protocols is very secure and almost immutable. However, most dapps and smart contracts require information from the real-world to trigger a certain action on the blockchain. Since blockchains cannot access off-chain data, a secure, trustworthy bridge between off-chain and on-chain data is needed. Blockchain oracles serve as bridges between blockchains and outside world and provide smart contracts with external information. Blockchain oracles can be centralized or decentralized and may leverage reputation, voting & other trust models.

All blockchain oracles

We list all blockchain oracles and showcase solutions below to help people assess existing solutions and pick the right one. 

Get to know blockchain oracles

On BC, all blockchain oracle providers can introduce themselves, explain solution & value proposition as well as opportunities to get involved.

Let’s get you started

These websites are great to get a first insight to blockchain oracles.

Blockchain Oracles Explained

Binance Academy shared a good introduction to blockchain oracles.

Research paper on trustworthy blockchain oracles

The authors provide a review and comparison of existing blockchain oracle solutions.

Linda Xie - DeFi Oracles

This curated list of oracle methods and contract addresses includes the most prominent DeFi projects.