Flow REST API, RPC & gRPC (Access API)
Flow Overview
Flow is a Layer 1 blockchain built for consumer applications and digital assets. Flow supports two execution environments:
- Cadence: Flow's native smart contract language with resource-oriented programming for managing digital assets
- EVM (Flow EVM): Full EVM equivalence introduced with the Crescendo upgrade in September 2024, allowing Ethereum contracts to run on Flow without code changes
Flow uses FLOW as its native token for transaction fees, staking, and network governance.
Interacting with Flow APIs
Flow provides three API options for developers:
- Flow REST API: HTTP-based API for querying blockchain data and submitting transactions
- Flow gRPC (Access API): High-performance gRPC interface for accessing Flow network data
- Ethereum JSON-RPC API (Beta): EVM-compatible JSON-RPC endpoints for Ethereum tooling and smart contracts
The EVM compatibility means developers can use standard Ethereum tools like Hardhat, Foundry, Web3.js, and Ethers.js. Cadence developers can interact with EVM contracts, and EVM contracts can access Cadence functionality through the VM Bridge, enabling cross-environment composability.
The Quicknode Flow documentation is continuously evolving as the chain undergoes upgrades and changes, so we highly recommend cross-referencing with the official Flow documentation for the latest updates and features.
Make Flow API Calls
The quickest way to start building on Flow is to create a Quicknode endpoint and send your first API request.
Quicknode provides managed Flow endpoints, giving you immediate access to Flow Mainnet and Testnet without the overhead of running infrastructure. These endpoints offer:
- 高可靠性——全球分布式基础设施，旨在最大限度地减少停机时间
- Enhanced performance – optimized latency and request handling for production applications
- 集成生态系统——通过 Quicknode 市场上的专用 API（插件）以及 Streams 等产品实现额外功能
请访问“快速入门”页面，创建您的端点并发送第一个请求。
支持的网络
Quicknode provides access to the following Flow networks:
Complete reference for developers building on Flow with Quicknode:
快速入门
Get started with Flow quickly. Follow our step-by-step quickstart to set up your endpoint and make your first API request.
提供商端点
Learn how to configure and manage your Flow endpoints for optimal performance and reliability.
API 概述
了解受支持的 API、网络、Quicknode 产品以及增强的 API 功能，用于构建功能强大的应用程序。
市场
探索并集成来自 Quicknode 应用商店的强大插件和工具，以增强您的 Web3 应用程序。
终端安全
通过身份验证、白名单和最佳安全实践来保护您的终端设备。
错误代码
Understand common error codes and troubleshooting steps for Flow API requests.