Ethereum Transaction Builder

local MCP server

Installation

Terminal

claude mcp add transaction-mcp-server -- uvx transaction-mcp-server

Run in your project folder. Add --scope user to use it everywhere.

Add to claude_desktop_config.json or .cursor/mcp.json.

{
  "mcpServers": {
    "transaction-mcp-server": {
      "command": "uvx",
      "args": [
        "transaction-mcp-server"
      ]
    }
  }
}

Build and sign Ethereum transactions - EIP-1559, gas estimation, RLP, ERC-20 transfers

Ethereum Transaction Builder is a local MCP server distributed as the pypi package transaction-mcp-server.

Run: claude mcp add transaction-mcp-server -- uvx transaction-mcp-server

Run: codex mcp add transaction-mcp-server -- uvx transaction-mcp-server

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