What is turnstile-brain?

An MCP server configuration for a service called turnstile-brain. MCP is a way for an agent to connect to external tools or services; this configuration starts the service with Node.js.

It is for registering and launching the turnstile-brain MCP server through its JavaScript startup script.

It gives the agent a defined connection to the turnstile-brain service without embedding the startup details in each task. This makes the service available according to the configured plugin location.

turnstile-brain — MCP server by febradc-github

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add mcp/febradc-github/turnstile/turnstile-brain

Clone the repo

git clone --depth 1 https://github.com/febradc-github/turnstile

Made for: Claude Code, Codex, Cursor.

Or install turnstile, the plugin that ships this one along with the rest of its 24 skills, 23 commands, 5 agents, 3 hooks, 1 MCP server.

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. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

turnstile-brain 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 2d 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.

.mcp.json · 8 lines

What it actually says

{
  "turnstile-brain": {
    "command": "node",
    "args": [
      "${CLAUDE_PLUGIN_ROOT}/scripts/brain-mcp.js"
    ]
  }
}

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.

2d ago First seen · 8 lines scan A 46393d213f27

Subscribe to this mod's changes

turnstile-brain is an MCP server published in the GitHub repository febradc-github/turnstile (1 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 2026-08-31.

ai-agents claude claude-code claude-code-plugin claude-plugin developer-tools

turnstile-brain

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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