Hydra is Cardano's layer 2 head protocol, letting a small group of participants transact off-chain at high speed and settle back to the main chain.
Source: Official website. Last checked 2026-09-18. Spot an error? Tell us.
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Adder is an event-driven tool and library for tailing the Cardano blockchain and reacting to on-chain events.
anetaBTC is a protocol for wrapping Bitcoin so that it can be used inside the Cardano and Ergo DeFi ecosystems.
Argus is a .NET indexing framework that turns Cardano block data into structured, queryable records for C# applications.
Blink Labs builds open-source nodes, protocol libraries, indexers and data services for UTxO blockchains, and co-operates the Demeter managed Cardano API service with TxPipe.
Blockfrost is a hosted Cardano API that gives developers instant, scalable access to chain data and transaction submission without running their own node, including a free tier.
Cardano on BigQuery, from Blockchain Applied, makes the full Cardano chain queryable with standard SQL in Google BigQuery.