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Oracles & Data

Explore oracle networks and data services that connect blockchain applications to external information. Compare official resources, requirements and limitations.

18 projects

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Oracles & Data projects

O OpenTimestamps Calendar Server OpenTimestamps Calendar Server is a Python daemon called `otsd` that aggregates OpenTimestamps requests, timestamps commitments against Bitcoin, and serves a remote calendar endpoint to OpenTimestamps clients.

S Scribe Scribe is a Solidity-based EVM oracle component that uses aggregated Schnorr multisignatures to publish data for smart contracts.

S Solana Pyth API Solana Pyth API is a web demo and local server application that uses Vybe API endpoints to explore Pyth oracle feed listings, current USD prices, OHLC candles, timestamp-based price history and product metadata.

C Chainlink Chainlink is an open-source repository containing a Go-based core node and contracts for participating in a decentralized oracle network that connects smart contracts with off-chain data and computation.

E Ethereum Watcher Ethereum Watcher is an open-source Go library that monitors current or historical Ethereum events and supplies selected blockchain data to applications.

E Eventeum Eventeum is Java infrastructure that listens for specified Ethereum smart-contract events and broadcasts them to middleware so backend microservices can consume them without subscribing directly to an Ethereum node.

B Blocksense Blocksense is an oracle network with a WebAssembly-based SDK for building blockchain oracles that retrieve internet data and perform CPU or GPU computations. Its reporting uses SchellingCoin-based consensus and zero-knowledge proofs.

O Orakl Network Orakl Network is an open-source oracle implementation for Kaia Blockchain, comprising on-chain contracts and off-chain services for VRF, request-response and data aggregation, with an API and CLI for service access and operator management.