EVM Compatible

Build on Ethereum Classic

The Olympia upgrade closes the final EVM gaps — Hardhat, Foundry, wagmi, viem, and ethers.js work on Ethereum Classic without modification, just like on Ethereum mainnet. Deploy your contracts to a network with immutability, code is law, and a continuous production record since July 2015.

Get Started Documentation

Chain ID

Testnet ID

Block Time

~13 seconds

EVM Version

Shanghai

Consensus

Proof of Work

Developer Resources

Getting Started

Step-by-step guide to deploying your first contract on ETC

Documentation

Tutorials, API references, and protocol specifications

Node Clients

Run your own node with Fukuii or Core-Geth

Developer Tools

Frameworks, libraries, and testing utilities

Network Configuration

Add ETC to your wallet or configure your development environment

Ethereum Classic

Production Network

Chain ID61

SymbolETC

RPC URLhttps://etc.rivet.link

ExplorerBlockscout

Add to Wallet via Chainlist

Mordor Testnet

Development & Testing

Chain ID63

SymbolMETC

RPC URLrpc.mordor.etccooperative.org

ExplorerBlockscout

Get Testnet ETC from Faucet

Recommended Tools

Industry-standard development tools that work seamlessly with ETC

Hardhat

Ethereum development environment for compiling, deploying, testing, and debugging smart contracts.

frameworkJavaScriptTypeScript

Foundry

Blazing fast, portable, and modular toolkit for Ethereum application development written in Rust.

frameworkSolidity

Remix IDE

Browser-based IDE for Solidity development with built-in compiler, debugger, and deployment tools.

ideSolidityVyper

ethers.js

Complete Ethereum library and wallet implementation in JavaScript/TypeScript.

libraryJavaScriptTypeScript

Viem

TypeScript interface for Ethereum with a focus on type safety and developer experience.

libraryTypeScript

OpenZeppelin

Library of secure, audited smart contract templates including ERC-20, ERC-721, access control, and more.

librarySolidity

View all developer tools

Node Clients

Run your own Ethereum Classic node for maximum decentralization

Fukuii

Recommended

Ethereum execution layer client in Scala 3 — native Proof-of-Work consensus for ETC mainnet and Mordor, Engine API for ETH mainnet and Sepolia. One binary, four networks. The primary ETC client for the Olympia era.

ScalaWindowsmacOSLinux

Docs GitHub

Core-Geth

Bridge release — sunset after Olympia. etclabscore/core-geth v1.12.x was unmaintained June 2024–March 2026 (21 months), accumulating six unpatched CVEs that were actively exploited against ETC mainnet bootnodes. All CVEs patched by White B0x at ethereumclassic/core-geth, pending release as v1.13.0. v1.13.x is the final series — migrate to Fukuii before Olympia activation.

GoWindowsmacOSLinux

Docs GitHub

View detailed client comparison