Ethereum & EVM Message Signing for Claude Code

io.github.nirholas/signing-mcp-server

Sign Ethereum messages - EIP-191, EIP-712 typed data, Permit2, signature verification and recovery

client:Claude Code transport:stdio runtime:pypi

Install Ethereum & EVM Message Signing in Claude Code

run in your project directory

claude mcp add signing-mcp-server -- uvx signing-mcp-server

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs