What problem does it solve? Ethereum tooling changes fast, and outdated knowledge leads developers and AI agents to deprecated frameworks, dead testnets, and inefficient workflows. This Skill provides an up-to-date reference of what actually works in 2026 for building and interacting with Ethereum. ## Core Features & Use Cases - Tool Discovery for AI Agents: Covers Blockscout MCP server for structured blockchain data, abi.ninja for zero-setup contract interaction, and x402 SDKs for HTTP payments. - Stack Selection Guidance: Compares Foundry vs Hardhat 3, Scaffold-ETH 2 for full-stack dApps, and wagmi/viem for React frontends. - Operational References: Includes essential Foundry cast commands, RPC providers, block explorer APIs, Sepolia faucets, and mainnet forking with anvil. - Use Case: An AI agent needs to read contract state on Base — this Skill directs it to Blockscout MCP or cast call with the correct RPC, avoiding deprecated approaches like Goerli or Truffle. ## Quick Start Ask the agent to recommend an Ethereum development stack and the right tools for reading contract data and deploying a smart contract in 2026.