Flow API

Flow is a layer-1 blockchain built by Dapper Labs and launched in 2020, designed for NFTs, games, and consumer apps at scale. Its multi-role architecture separates the work of validating transactions to boost throughput without sharding, powering projects such as NBA Top Shot.

Networks Mainnet, Testnet
Released 2020
Consensus Proof of Stake
Smart contracts Yes
Block time ~1 second
Smart contract language(s) supported Cadence
Get access to Flow APIs using our unified endpoints. Get blockchain data, blockchain events, automations and more.

Bitcoin
Ethereum
XRP Ledger
Ethereum Classic
Bitcoin Cash
Dash
Litecoin
Dogecoin
Zilliqa
View all supported

The Flow API — build without running a node

Access Flow blockchain data through one unified REST API: transaction and address data, balances, block data, and real-time webhooks for on-chain events — with no Flow node to run and maintain. Start free and scale as you grow.

Blockchain data

Read Flow transactions, addresses, balances, UTXOs, and block data through one REST API.

Real-time webhooks

Subscribe to on-chain events — incoming and outgoing transactions, confirmations, and mined blocks.

No node to run

Skip the infrastructure — managed, always-synced access with no node to operate or maintain.

View the API docs Start building free

Building a full wallet? Explore Wallet as a Service.

Need prices too? See the crypto price API, or run your own Flow RPC nodes.

Built for consumer-scale apps

Flow splits validation into specialized node roles (collection, consensus, execution, verification), letting the network scale throughput while keeping a single shared state. Combined with the resource-oriented Cadence language, it is optimized for NFTs, games, and mainstream applications.