Ethereum Transaction Builder

About Ethereum Transaction Builder

Use Ethereum Transaction Builder with your agent

claude mcp add ethereum-transaction-builder -- uvx transaction-mcp-server

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

Frequently asked questions

What is Ethereum Transaction Builder?

Ethereum Transaction Builder is an MCP (Model Context Protocol) server by nirholas in the Blockchain category. Build and sign Ethereum transactions - EIP-1559, gas estimation, RLP, ERC-20 transfers

How do I connect Ethereum Transaction Builder to Claude, Cursor, or another MCP client?

Install Ethereum Transaction Builder from its pypi package (transaction-mcp-server) and register it under "mcpServers" in your client's MCP configuration — for example claude_desktop_config.json or Cursor's mcp.json — then restart the client.

Is Ethereum Transaction Builder open source?

Yes — the source code is public at github.com/nirholas/ethereum-wallet-toolkit, with 23 GitHub stars.

Can AI agents pay to use Ethereum Transaction Builder?

Not yet through Loomal — Ethereum Transaction Builder is listed as a free directory entry. If its maintainer verifies ownership, they can set per-call USDC pricing that agents pay over x402, with settlement on Base.