The .NET integration platform for Ethereum and EVM-compatible blockchains. From smart contract interaction to a complete in-process Ethereum node, blockchain indexer, explorer, account abstraction bundler, MUD framework, multi-platform wallets, Unity integration, and .NET Aspire orchestration — 130+ packages targeting netstandard 2.0 through .NET 10 and Unity.
The main Nethereum solution and projects: github.com/Nethereum/Nethereum
dotnet add package Nethereum.Web3
| I want to... | Section |
|---|---|
| Query balances, send ETH, interact with contracts | Core Foundation |
| Delegate an EOA to a smart contract (EIP-7702) | Core Foundation |
| Sign with HD wallets, Ledger/Trezor, AWS KMS, Azure Key Vault | Signing & Key Management |
| Deploy contracts, generate C# services from ABI | Smart Contracts |
| Work with ERC-20/721/1155 tokens (built-in typed services) | Smart Contracts |
| Simulate transactions and preview state changes before signing | EVM Simulator |
| Debug EVM execution step-by-step (opcodes, stack, storage) | EVM Simulator |
| Run a local dev chain — no external node required | DevChain |
| Spin up a full dev environment with .NET Aspire | DevChain |
| Swap tokens on Uniswap (V2/V3/V4) | DeFi |
| Accept or pay for crypto payments (x402) | DeFi |
| Execute Gnosis Safe multi-sig transactions | DeFi |
| Use smart accounts and paymasters (ERC-4337) | Account Abstraction |
| Deploy ERC-7579 modular smart accounts | Account Abstraction |
| Run an ERC-4337 bundler | Account Abstraction |
| Index blockchain data to PostgreSQL / SQL Server / SQLite | Data & Indexing |
| Build a blockchain explorer (ABI decoding, contract interaction) | Data & Indexing |
| Get token prices, ABI from Etherscan/Sourcify, RPC via Chainlist | Data Services |
| Read, write, and index MUD table records | MUD |
| Build a multi-platform wallet app (Blazor, MAUI, Avalonia) | Wallet SDK |
| Connect browser wallets in Blazor (EIP-6963, WalletConnect, SIWE) | Blazor dApp |
| Build Unity games with Ethereum | Unity |
| Verify balances without trusting RPC (light client) | Consensus |
| Launch a custom application chain with sequencer and sync | AppChains |
For the full list of 100+ use cases with packages, see What Do You Want to Do? or the Component Catalog.
| Package | NuGet | Description |
|---|---|---|
| Nethereum.Web3 |  | High-level entry point: RPC, contracts, accounts, signing |
| Nethereum.Contracts |  | Smart contract interaction with typed services for ERC-20, ERC-721, ERC-1155, ENS, and more |
| Nethereum.Signer |  | Transaction signing, EIP-155/1559/4844/7702, message signing |
| Nethereum.HdWallet |  | BIP32/BIP39/BIP44 hierarchical deterministic wallets |
| Nethereum.EVM |  | Full in-process EVM simulator with debugging and state tracing |
| Nethereum.DevChain.Server |  | In-process Ethereum dev chain — no external node required |
| Nethereum.BlockchainProcessing |  | Blockchain data indexing with reorg detection and token transfer processing |
| Nethereum.Explorer |  | Blazor Server blockchain explorer with ABI decoding and contract interaction |
| Nethereum.AccountAbstraction |  | ERC-4337 account abstraction + ERC-7579 modular smart accounts |
| Nethereum.Mud |  | MUD autonomous worlds: table queries, store indexing, normalisation |
| Nethereum.Uniswap |  | Uniswap V2/V3/V4 + Permit2 |
| Nethereum.X402 |  | HTTP 402 crypto payments (client + server middleware) |
| Nethereum.GnosisSafe |  | Gnosis Safe multi-sig integration |
| Nethereum.Siwe |  | Sign-In with Ethereum (EIP-4361) |
| Nethereum.Wallet |  | Multi-platform wallet core: accounts, vault, transaction services |
| Nethereum.Blazor |  | Blazor dApp integration: EIP-6963 wallet discovery, auth state |
| Nethereum.AppChain.Sequencer |  | Custom application chain with EVM, sequencer, and AppChainBuilder |
All packages: nuget.org/profiles/nethereum
Try Nethereum directly in your browser — chain interaction, Ether transfers, ERC20/ERC721, ENS, SIWE, HD wallets, log processing, and more.
Get started quickly with dotnet new templates:
dotnet new install Nethereum.Templates.Pack
dotnet new install Nethereum.Aspire.TemplatePack
| Template | Short Name | Description |
|---|---|---|
| Smart Contract Library + ERC20 XUnit | smartcontract | Smart contract dev with auto code generation and integration tests |
| ERC721/ERC1155 Open Zeppelin | nethereum-erc721-oz | NFT and multi-token development with OpenZeppelin |
| Blazor MetaMask Wasm/Server | nethereum-mm-blazor | Blazor + MetaMask integration |
| Blazor SIWE Wasm/Server/REST | nethereum-siwe | Sign-In with Ethereum authentication |
| WebSocket Streaming | nethereum-ws-stream | Real-time blockchain data streaming |
| Aspire DevChain Environment | nethereum-devchain | Full dev environment: DevChain + PostgreSQL + Indexer + Explorer |
Sources: SmartContractDefault, OZ-Erc721-Erc1155, Metamask.Blazor, SIWE
A .NET Blazor Wasm SPA, Desktop (Windows/Mac), Android and iOS light blockchain explorer and wallet.
Source: Nethereum-Explorer-Wallet-Template-Blazor | Try it: explorer.nethereum.com
A reactive cross-platform desktop wallet using Nethereum, Avalonia, and ReactiveUI.
Source: Nethereum.UI.Desktop
| Resource | Description |
|---|---|
| Nethereum.Unity | Unity package — install via git URL |
| Unity3dSampleTemplate | Getting started: BlockNumber, Ether transfer, ERC20, MetaMask, cross-platform |
| Nethereum.Unity.Webgl | WebGL + MetaMask: deploy ERC721 NFTs from Unity |
- Documentation: docs.nethereum.com
- Playground: playground.nethereum.com
- Discord: Join the community — technical support, chat, and collaboration