Phocinae MCP

Name: Phocinae MCP
Author: Phocinae

by Phocinaeversion 0.2.6i★ –iRuns on your computer

Registry nameio.github.Phocinae/phocinae-mcp

Install

Overview

Description from the maker (original English)

Local Phocinae decision-engine MCP stdio server: fail-closed approval gate + classify/route/score.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

PyPIPython’s uv installed (for the uvx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "phocinae": {
      "command": "uvx",
      "args": [
        "phocinae-mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add phocinae -- uvx phocinae-mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "phocinae": {
      "command": "uvx",
      "args": [
        "phocinae-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "phocinae": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "phocinae-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account Phocinae, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32673 servers in this category
Published to the registry more recently than 60% of the other 32673 servers in this category
Basic checks equal to or better than 100% of the other 32673 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Phocinae MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.6) reached the registry 25 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Systemdox

Alternatives

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

phocinae-mcp

把斑海豹的命令审批门与 P0 推理协议暴露为 MCP 工具（gate / classify / route / score），接入只读 MCP 的编码代理。双代协议并存：现代面（2026-07-28，含 server/discover、MRTR 交互、Streamable HTTP）与 2024-11-05 旧客户端兼容。

▲ tools/list 的真实应答：四个工具的参数与返回形状

斑海豹生态的 MCP server：把斑海豹的命令审批与推理能力以 4 个工具暴露给 MCP 客户端。纯标准库（Python ≥ 3.8，零第三方依赖），支持 stdio 与 Streamable HTTP 两种传输，MCP 2026-07-28 对齐并兼容 2024-11-05 旧客户端。

本仓库为本地增强版（基于 PyPI phocinae-mcp 0.1.1），仅用于本地开发与

协议对齐验证，不发布。

Install (local enhanced build)

git clone https://github.com/Phocinae/phocinae-mcp.git

cd phocinae-mcp python3 -m pip install . phocinae-mcp --help

This repository is a local enhanced build and is not the PyPI release; the registry entry and the package below refer to the same server contract.

工具

▲ 合成演示动画（模型仓 docs/gallery S07）：画面为逐帧渲染、场景数据虚构，但它演示的 `route` 工具「一次前向在候选工具里选出该用的那个」的判定过程 与真实实现一致（本页上方的终端截图即真实运行的同一流程）。

工具	作用	输入	输出
`gate`	判定 shell 命令能否执行	`command`、`cwd?`、`server?`	`decision` ∈ allow/deny/ask + `layer`/`reason`
`classify`	把状态归入候选标签之一	`state`、`labels`、`server?`	`choice`（下标）+ `label`
`route`	从候选工具中选最合适的一个	`state`、`tools`、`server?`	`choice` + `tool`
`score`	按标准给状态打 2–10 分	`state`、`criteria`、`server?`	`score` + `range`

fail-closed：斑海豹 P0 服务（/v1/systemone）不可用、超时、应答异常时， gate 一律返回 deny（带原因），classify/route/score 返回 isError: true。

传输方式

stdio（默认）

python3 -m phocinae_mcp --server http://127.0.0.1:8155

MCP 客户端以子进程方式拉起，走 stdin/stdout 逐行 JSON-RPC 帧。 stdout 纯净性保证：stdout 只输出 JSON-RPC 帧；一切日志（启动、告警、工具内部异常）只走 stderr（phocinae-mcp[level]: 前缀）。guard.py 导入期的打印也被重定向到 stderr，不会污染协议通道。

Streamable HTTP（新增，2026-07-28）

python3 -m phocinae_mcp --transport http --host 127.0.0.1 --port 8255

--port 0 → 随机端口（测试用）；端口号打印在 stderr

仅回环绑定：--host 只接受 127.0.0.1 / localhost / ::1，其他地址直接拒绝启动（exit 2）；
端点 POST /mcp；通知 → 202 Accepted（空 body）；请求 → 200 单对象 JSON；
请求头强制（Server Validation）：MCP-Protocol-Version 必带且须受支持（否则 400 + -32020/-32022）、Mcp-Method 必带且等于 body 的 method（tools/call、resources/read 还必带 Mcp-Name 等于 name/uri），违者 400 -32020；Accept 未含 application/json / text/event-stream → 406；未知方法 → 404 -32601；GET/DELETE → 405（2026-07-28 已移除 GET 流与会话终结端点）；
无会话头（Mcp-Session-Id）、无 SSE 恢复缓冲——无状态服务，可任意重启。

环境变量：PHOCINAE_MCP_TRANSPORT=stdio|http、PHOCINAE_MCP_HTTP_PORT 可替代命令行开关。

协议对齐（2026-07-28）

双代并存，按请求逐条分派：

带 params._meta（含 io.modelcontextprotocol/* 键）的请求、以及 server/discover、resources/* → 现代面；
initialize 握手、无 _meta 的请求 → 旧年代（2024-11-05 行为，与原版 0.1.x 一致）。

现代面补足项：

项	实现
`server/discover`	必实现：`supportedVersions`、`capabilities`、`_meta.serverInfo`、`instructions`，`ttlMs=3600000`、`cacheScope=public`
`_meta` 校验	逐请求必填 `protocolVersion` + `clientCapabilities`，缺失 → `-32602`；版本不支持 → `-32022`（`data.supported`/`data.requested`）
`resultType`	一切结果携带（`complete` / `input_required`）
`ttlMs`/`cacheScope`	`discover`、`tools/list`、`resources/*`（静态内容，`public` 共享缓存）
多轮交互（MRTR）	`gate` 返回 `ask` 且客户端声明 `elicitation` 能力时 → `resultType=input_required` + `inputRequests.gate_confirmation`（`elicitation/create`，form）+ `requestState`；回执 `accept`/`decline`/`cancel` → allow/deny/不授权；`requestState` 为 HMAC-SHA256 防篡改 + 10 分钟过期 + 请求指纹（tool+command）比对，篡改/过期自动重发交互
resources	`resources/list` + `resources/read` 暴露审批策略全文 `phocinae://policy/gate-approval`（text/markdown，含 L0/L1/fail-closed 判定链路、阈值、ask 处理义务）
已移除方法	现代面下 `initialize`/`ping`/`shutdown`/`logging/setLevel`/`subscriptions/listen` → `-32601`（data 附 supportedVersions）
工具 schema 收紧	`maxLength`（command/state 20000、cwd 4096、server 2048、列表单项 2000）、`minItems`/`maxItems`（1–100）、`enum`（decision/layer）、`outputSchema` 全量声明（classify/route/score `additionalProperties:false`）；服务端同步执行同口径校验（越限 → `-32602`）
description 重写	四工具均按「何时使用 / 何时不使用」结构重写
日志	全部走 stderr；`_meta` 里 `io.modelcontextprotocol/logLevel` 门控（`info` 起，MCP 级日志协议字段）

兼容性：旧客户端 initialize 握手返回 2024-11-05 能力；无 _meta 的 tools/list/tools/call 按旧年代应答（不报错）——对旧客户端零破坏。

运行

▲ tools/call 真实判定：L0 定夺安全/危险命令，灰区才调模型

# stdio（默认）

python3 -m phocinae_mcp [--server http://127.0.0.1:8155] [--timeout 5] [--guard /path/to/guard.py] [--l1-enabled] [--model ]

Streamable HTTP

python3 -m phocinae_mcp --transport http [--host 127.0.0.1] [--port 8255]

python3 -m phocinae_mcp --version

--guard：复用 phocinae-guard 的 guard.py（L0 确定性表 + L1 编排），自动探测同级 ../phocinae-guard/guard.py；找不到则 gate 降级为纯 HTTP noul+score 两问（engine: "http:noul+score"）。导入 guard 时不写 __pycache__（只读复用）。

测试

python3 tests/test_mcp.py    # stdio 双代全流程冒烟 → tests/mcp_smoke.txt

python3 tests/test_http.py # Streamable HTTP 冒烟 → tests/http_smoke.txt

test_mcp.py：模拟 MCP 客户端，走 stdio 依次执行旧年代 initialize → notifications/initialized → ping → tools/list → tools/call 全工具矩阵（含失败分支）→ shutdown；现代年代 discover → tools/list → 全工具矩阵（gate allow/deny/ask、MRTR 接受/拒绝/取消/篡改、fail-closed、 schema 越限、-32602/-32022/-32601、resources）→ 通知。同时对 stdout 逐行审计（每行必须是 JSON-RPC 帧、日志零泄漏、无 traceback）。
test_http.py：HTTP 头校验矩阵（-32020/-32022/406/405/404/ 202）+ MRTR 全链路 + resources。
两个测试共用 tests/mock_systemone.py（确定性 mock P0 服务，不跑模型）。

├── server.py 主程序：双代分派、MRTR、CLI（stdio/http） ├── http_transport.py Streamable HTTP（新增） ├── protocol.py 2026-07-28 共享件（新增）：版本/错误码/_meta 校验/ │ resultType/ttlMs/cacheScope/HMAC requestState/策略文本/日志门控 ├── tools.py 四工具 + 收紧后的 schema（description 重写） ├── backend.py 斑海豹 P0 客户端（原版不动） ├── guard_bridge.py guard.py 复用桥（+stdout 纯净性防护） └── init.py / main.py tests/ ├── test_mcp.py stdio 全流程冒烟 → mcp_smoke.txt ├── test_http.py HTTP 冒烟 → http_smoke.txt └── mock_systemone.py 确定性 mock P0 服务

安全声明（与斑海豹生态同口径）

▲ test_mcp.py 42/42 + test_http.py 18/18：帧强制 UTF-8，与 locale 无关（这是 0.1.x 上真实存在的缺陷）

gate 的 ask 结果要求集成方把命令与理由呈现给人工，未获明确批准不得执行（现代面走 elicitation 交互，旧年代走结果文本）；
判定结果不构成任何法律责任承诺；fail-closed 是唯一默认；
审批策略全文见资源 phocinae://policy/gate-approval（resources/read）。

Phocinae MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Systemdox

README from the maker

phocinae-mcp

Install (local enhanced build)

工具

传输方式

stdio（默认）

Streamable HTTP（新增，2026-07-28）

--port 0 → 随机端口（测试用）；端口号打印在 stderr

协议对齐（2026-07-28）

运行

Streamable HTTP

测试

目录

安全声明（与斑海豹生态同口径）