Fuse is an Ethereum-compatible blockchain platform designed to make Web3 payments accessible to every business and developer. With block times under 5 seconds, transaction costs around $0.0001, and built-in account abstraction via ERC-4337, Fuse lets you build consumer-grade payment applications without the UX friction typical of blockchain development.Documentation Index
Fetch the complete documentation index at: https://mintlify.com/fuseio/fuse-docs/llms.txt
Use this file to discover all available pages before exploring further.
Quick Start
Deploy your first smart contract and connect it to FuseBox in minutes
FuseBox SDK
TypeScript and Flutter SDKs for smart wallets, gasless transactions, and more
API Reference
REST APIs for balances, trading, notifications, staking, and blockchain exploration
Fuse AI
Agentic payments infrastructure for AI agents and automated systems
What you can build on Fuse
Fuse provides the full stack for payment and Web3 applications — from low-level blockchain infrastructure to high-level SDKs and APIs that abstract away complexity.Gasless Apps
Sponsor gas fees for your users via the ERC-4337 Paymaster, creating seamless Web2-like experiences
Smart Wallets
Programmatically create and manage ERC-4337 smart contract wallets for your users
DeFi & Trading
Access DEX liquidity, token prices, and swap functionality through the Trade API
Token Management
Query token balances, transaction history, and portfolio data across any address
AI Agent Payments
Enable machine-to-machine micropayments via x402, MPP, and ERC-8183 standards
Staking & Validation
Participate in network security as a validator or delegate FUSE to earn rewards
Get started in 3 steps
Connect to Fuse Network
Add Fuse Mainnet (Chain ID: 122) to your wallet or development environment. The RPC endpoint is
https://rpc.fuse.io/. See network connection guide.Get a FuseBox API Key
Create an Operator account at console.fuse.io, fund it with at least 10 FUSE, and obtain your API key to access FuseBox SDKs and APIs. See the FuseBox guide.
Build with the SDK
Install
@fuseio/fusebox-web-sdk and initialize the FuseSDK with your API key to start creating smart wallets and sending gasless transactions. See the SDK reference.Network at a glance
| Parameter | Value |
|---|---|
| Chain ID (Mainnet) | 122 |
| Chain ID (Testnet) | 123 |
| RPC (Mainnet) | https://rpc.fuse.io/ |
| Block time | ~5 seconds |
| Gas price | 10 GWei |
| Transaction cost | ~$0.0001 |
| Consensus | Delegated Proof of Stake (DPoS) |
| EVM Compatible | Yes |
Fuse is fully EVM-compatible — any Solidity smart contract and Ethereum tooling (Hardhat, Remix, Foundry, ethers.js, viem) works on Fuse without modification.