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byob

byob is an MCP server for Claude Code from wxtsky/byob. Its token cost is not measured, scanned A, original, MIT.

An MCP server called BYOB, started with Node.js. MCP is a standard way for an AI client to connect to external tools and data.

In plain words
What is it for?
Use it when a project’s BYOB server needs to be available to the agent through MCP.
Why use it?
It gives the agent a configured connection to the BYOB server without requiring a separate manual launch command. The supplied details do not describe what BYOB does.

MCP server for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: listed in a Claude config.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the byob plugin — 1 skill, 1 MCP server shipped together

not rated 131repo +1 1mo ago A scan tokens not measured original MIT

Good fit Use it when a project’s BYOB server needs to be available to the agent through MCP.

Compare 6 mcp servers from other repositories ↓
View source ↗ wxtsky/byob
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add wxtsky/byob
Claude Code
/plugin install byob

Made for: Claude Code.

Or install byob, the plugin that ships this one along with the rest of its 1 skill, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for byob

README.md
[![agentmods](https://agentmods.dev/badge/mcp/wxtsky/byob/byob-byob.svg)](https://agentmods.dev/mcp/wxtsky/byob/byob-byob)
Your own site
<a href="https://agentmods.dev/mcp/wxtsky/byob/byob-byob"><img src="https://agentmods.dev/badge/mcp/wxtsky/byob/byob-byob.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

byob scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/byob/.mcp.json · 8 lines

What it actually says

{
  "byob": {
    "command": "node",
    "args": [
      "${CLAUDE_PLUGIN_ROOT}/servers/byob-mcp.mjs"
    ]
  }
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 8 lines scan A 22d4be81cec1

Subscribe to this mod's changes

byob is an MCP server published in the GitHub repository wxtsky/byob (131 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Claude Codeai-agentbrowser-automationbunchrome-debuggerchrome-extension
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