Ethereum Toolkit

This connects Claude to Ethereum Mainnet and Sepolia testnet via the teckel web3 JSON-RPC services. You get read-only blockchain operations like checking gas prices with eth_gasPrice, querying account balances with eth_getBalance, fetching the current ETH price in USD, and inspecting transactions in the latest blocks. It's geared toward giving LLMs real-time answers about on-chain state without needing write access or wallet signing. You'll need a teckel API key from their mobile app, which you pass as a Bearer token in your MCP client config. Available over both streamable HTTP and SSE transports, and you can call the same functions directly via REST if you want to skip the MCP layer entirely.