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context-firewall

context-firewall is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from Alepha188838884/context-firewall. Its token cost is not measured, scanned A, original, MIT.

A local proxy for Model Context Protocol servers, which are services that give an AI agent access to tools. It combines tools from multiple servers into four general-purpose tools and shortens large tool results.

In plain words
What is it for?
Use it as a local intermediary between an agent and multiple MCP servers when their tool lists or responses are too large to manage directly.
Why use it?
It can reduce the amount of tool information and returned data an agent must handle when many servers are connected. The description does not specify how the four tools are used.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Written for no agent in particular: it speaks MCP, so any client can run it.

not rated 2 3d ago A scan tokens not measured original MIT
View the source file Alepha188838884/context-firewall npmjs.com
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/alepha188838884/context-firewall/context-firewall
Clone the repo
git clone --depth 1 https://github.com/Alepha188838884/context-firewall

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

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 context-firewall

README.md
[![agentmods](https://agentmods.dev/badge/mcp/alepha188838884/context-firewall/context-firewall.svg)](https://agentmods.dev/mcp/alepha188838884/context-firewall/context-firewall)
Your own site
<a href="https://agentmods.dev/mcp/alepha188838884/context-firewall/context-firewall"><img src="https://agentmods.dev/badge/mcp/alepha188838884/context-firewall/context-firewall.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. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

context-firewall 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 5d 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.

server.json · 10 lines

What it actually says

{
  "context-firewall": {
    "command": "npx",
    "args": [
      "-y",
      "context-firewall"
    ],
    "env": {}
  }
}
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. 5d ago First seen · 10 lines scan A 541cd7ec7afe

Subscribe to this mod's changes

context-firewall is an MCP server published in the GitHub repository Alepha188838884/context-firewall (2 stars, last pushed 3d 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.

Building agentsLLMai-agentsclaudecontext-windowmcpmcp-proxy
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