Consensus
Consensus on the APIs.io network is a curated area collecting 5 resources — specifications, tools, and documentation — for this subject.
24 providers on the network work in this area, including Apache Helix, Etcd, Pocket Network, Blockfrost, Amazon Managed Blockchain, Amazon IoT Events, and 18 more — each links out to that provider’s APIs, schemas, and governance artifacts.
Related areas: Circuit Breaker. Browse every area at areas.apis.io.
About this area
Consensus is the distributed systems problem of getting a set of unreliable processes to agree on a value or sequence of values. Consensus algorithms power state-machine replication for databases, key-value stores, configuration systems, and blockchains. The consensus topic spans classical crash-fault tolerant algorithms (Paxos, Raft, Multi-Paxos, Zab, Viewstamped Replication) and Byzantine fault tolerant algorithms (PBFT, Tendermint, HotStuff, Casper FFG/CBC), and the impossibility result FLP that bounds what is possible in fully asynchronous models.
Curated resources (5)
Paxos
Paxos is the classical crash-fault-tolerant consensus algorithm introduced by Leslie Lamport in 1989. Paxos and its derivatives (Multi-Paxos, Cheap Paxos, Vertical Paxos, EPaxos, Flexible Paxos) are foundational to di...
Raft
Raft is a consensus algorithm designed for understandability, published by Ongaro and Ousterhout in 2014. Raft separates leader election, log replication, and safety into distinct concepts and is implemented widely in...
Practical Byzantine Fault Tolerance (PBFT)
PBFT, by Castro and Liskov (1999), is a Byzantine fault-tolerant consensus protocol that tolerates up to f Byzantine failures with 3f+1 replicas. PBFT influenced subsequent BFT protocols including Tendermint and HotSt...
Tendermint / CometBFT
Tendermint (now CometBFT) is a Byzantine fault-tolerant consensus engine that powers Cosmos SDK chains. CometBFT decouples consensus from application logic via the Application Blockchain Interface (ABCI), allowing cus...
HotStuff
HotStuff is a leader-based BFT consensus protocol with linear view change and three-chain commit, designed by Yin et al. HotStuff is the foundation for Diem/Libra BFT and inspired modern protocols like Aptos AptosBFT ...
Related providers (193)
Top 24 of 193 network providers tagged for this area — search the full set on apis.io.
| Provider | Description | APIs | Rating |
|---|---|---|---|
| Apache Helix | Apache Helix is a generic cluster management framework for partitioned and replicated distributed resources. It automates partition management, replication, fault tolerance, and... | 2 | thin |
| Etcd | etcd is a CNCF graduated distributed, reliable key-value store used as the backing store for all Kubernetes cluster data. It provides strong consistency guarantees using the Raf... | 5 | thin |
| Pocket Network | Pocket Network is the decentralized RPC layer of Web3 — a permissionless, fully open data delivery protocol built on Cosmos SDK and CometBFT (the Shannon upgrade, June 2025). 5,... | 3 | strong |
| Blockfrost | Blockfrost is a RESTful API service providing access to the Cardano blockchain and its ecosystem. It serves as an infrastructure layer for developers building dApps, wallets, NF... | 1 | strong |
| Amazon Managed Blockchain | Amazon Managed Blockchain is a fully managed service that allows you to create and manage scalable blockchain networks using popular open-source frameworks such as Hyperledger F... | 1 | strong |
| Amazon IoT Events | AWS IoT Events is a managed service that makes it easy to detect and respond to events from IoT sensors and applications. You can use it to build complex event detection logic, ... | 1 | developing |
| Couchbase | Couchbase is a distributed, document-oriented NoSQL cloud database platform that combines the flexibility of JSON, the power of SQL++ querying, and the performance of an in-memo... | 12 | developing |
| Apache CouchDB | Apache CouchDB is an open-source distributed document-oriented NoSQL database governed by the Apache Software Foundation. It uses JSON for data storage, a RESTful HTTP/JSON API ... | 1 | developing |
| Solana | Solana is a high-performance blockchain platform designed for fast, secure, and scalable decentralized applications and marketplaces. It exposes a JSON-RPC 2.0 API over HTTP and... | 7 | developing |
| Amazon QLDB | Amazon Quantum Ledger Database (QLDB) is a fully managed ledger database that provides a transparent, immutable, and cryptographically verifiable transaction log. QLDB tracks ea... | 1 | developing |
| Amazon Step Functions | Amazon Step Functions is a serverless workflow orchestration service that lets you coordinate distributed applications and microservices using visual workflows, enabling you to ... | 1 | developing |
| Chainstack | Chainstack is a managed multi-chain RPC and node infrastructure platform supporting 70+ blockchain protocols including Ethereum, Solana, Bitcoin, BNB Smart Chain, Polygon, Arbit... | 26 | developing |
| CoinGecko | CoinGecko is a cryptocurrency data aggregator providing market data, analytics, and information on thousands of crypto assets, exchanges, derivatives, NFTs, and on-chain decentr... | 3 | developing |
| CryptoCompare | CryptoCompare (now CoinDesk Data / CCData, acquired by CoinDesk in late 2024) is a long-standing crypto market data aggregator covering 300+ exchanges, 10,000+ assets, and 300,0... | 4 | developing |
| Covalent | 6 | developing | |
| Azure Migrate | Azure Migrate provides a unified platform for discovering, assessing, and migrating on-premises servers, infrastructure, applications, databases, and data to Azure. Its REST API... | 8 | developing |
| Arweave | Arweave is a permanent decentralized data storage network that enables developers to store data forever with a single upfront payment. It provides REST and GraphQL APIs for uplo... | 3 | developing |
| Aptos | Aptos is a Move-based Layer 1 blockchain platform that exposes a REST API for reading on-chain state and submitting transactions, a GraphQL Indexer API for high-level queries ov... | 4 | developing |
| Coinbase | Coinbase is a leading cryptocurrency platform providing trading, custody, and payment infrastructure for individuals, businesses, and institutions. The Coinbase Developer Platfo... | 8 | developing |
| IOTA | IOTA is an open-source distributed ledger technology built to bring real-world applications on-chain. It is the first internet-scale programmable blockchain platform powered by ... | 9 | developing |
| Zeebe | Zeebe is the cloud-native workflow engine that powers Camunda 8, providing scalable, resilient workflow automation and microservices orchestration without relying on a central d... | 1 | developing |
| Binance | Binance is the world's largest cryptocurrency exchange by trading volume, providing APIs for spot trading, futures, margin, wallet management, and market data across 19+ special... | 21 | developing |
| Uniblock | Uniblock is a Web3 infrastructure platform that provides a standardized API aggregating data from hundreds of DEXs and cross-chain bridges, abstracting the complexity of multi-c... | 3 | developing |
| Apache BookKeeper | Apache BookKeeper is a scalable, fault-tolerant, and low-latency storage service optimized for real-time workloads developed by the Apache Software Foundation. It provides a sim... | 2 | developing |
Related areas
Tags: Algorithms, BFT, Blockchain, Consensus, Crash Fault Tolerance, Distributed Systems, Replication, State Machine.
Sourced from the api-evangelist/consensus topic repo.