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Ethereum Transaction Builder MCP Server

local only

Ethereum Transaction Builder runs on your own machine — the client starts it, so there is no endpoint to ping. 82 installs a week from pypi. Last commit 5 Nov 2026.

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

Installs per day peak 23 · avg 11 · +12% w/w
a month agotoday
82
Installs / week
pypi · transaction-mcp-server
29
Stars
0 open issues
5 Nov 2026
Last commit
from GitHub
—
License
HTML

What the code does

We read the source, 2 d ago · rules 995398eba69f

In the project's build, not in the package

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Nothing serious here today

Today is the operative word: we check Ethereum Transaction Builder every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add transaction-mcp-server -- uvx transaction-mcp-server
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "transaction-mcp-server": {
      "command": "uvx",
      "args": [
        "transaction-mcp-server"
      ]
    }
  }
}
~/.codex/config.toml
[mcp_servers.transaction-mcp-server]
command = "uvx"
args = ["transaction-mcp-server"]
.cursor/mcp.json
{
  "mcpServers": {
    "transaction-mcp-server": {
      "command": "uvx",
      "args": [
        "transaction-mcp-server"
      ]
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "transaction-mcp-server": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "transaction-mcp-server"
      ]
    }
  }
}

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Ethereum Transaction Builder — questions

Answers built from our own checks of this server.

Why is there no uptime for Ethereum Transaction Builder?
Ethereum Transaction Builder runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package transaction-mcp-server was installed 82 times last week.
How do I connect Ethereum Transaction Builder?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls transaction-mcp-server straight from pypi; nothing to host, nothing to sign up for.
How many people use Ethereum Transaction Builder?
The pypi package transaction-mcp-server was installed 82 times in the last week. Week over week that is +12%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Ethereum Transaction Builder open source?
We cannot say either way: written in HTML and 29 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.