What problem does it solve? Ethereum tooling changes fast, and outdated knowledge leads developers and AI agents to deprecated frameworks, dead testnets, and wrong workflows. This Skill provides a current, verified reference of what actually works for building on Ethereum today. ## Core Features & Use Cases - Tool Selection Guidance: Compares Foundry, Hardhat 3, Scaffold-ETH 2, viem, and wagmi so you pick the right stack for contract-focused or full-stack dApp work. - Agent Integration Patterns: Documents Blockscout MCP for structured blockchain reads, abi.ninja for zero-setup contract interaction, and x402 SDKs for HTTP payments. - Operational Reference: Lists RPC providers, block explorers, Sepolia faucets, and essential cast commands for reading, sending, and testing against forked mainnet. - Use Case: An AI agent needs to query a contract on Base. Instead of scraping Etherscan, it uses the Blockscout MCP server for structured data and abi.ninja to explore the contract's functions. ## Quick Start Ask the agent to recommend an Ethereum development stack and show how to read a contract's balance using cast and a free RPC endpoint.