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Model Context Protocol

本地Local 只读Read-only verified lifecycle: active 核验Checked 2026-10-23

不是可用工具——官方明说这是给 MCP 客户端开发者做功能测试的 server，唯一用途是验证客户端协议实现是否正确。

Not a usable tool — the official page states plainly that this server exists for MCP client developers to run functional tests against; its only purpose is verifying that a client implements the protocol correctly.

适合与不适合When to use it, when not to

仅适合一件事：测试你的 MCP 客户端是否正确实现了协议。

不适合任何实际任务场景。 官方定位就是测试工具，工具清单长是为覆盖协议特性，不是为实用。

Scenarios where you are testing an MCP client implementation rather than using a tool.

Not a fit for real work — the official page states its only purpose is verifying that a client implements the protocol correctly.

中文生态China availability 国产 / 国内可直接用 / 备案状态 · 快照domestic / direct access / CAC filing · snapshot 2026-10-20

出品属地Origin: 国外出品foreign-made　国外主体（网信办公示名单未见对应备案主体）。foreign entity (no matching filing entity in the CAC registry).
国内使用Direct access: 大陆可直连direct OK　官网仓库在 GitHub，大陆直连波动（同日实测 200/000 混合）；npm / PyPI 安装源实测稳定可达。Hosted on GitHub — direct reachability from mainland fluctuates (200/000 mixed on the same day); npm / PyPI install routes measured stable.
备案状态CAC filing: 未见于备案名单not in filing list：未见于网信办公示名单（2026-10-20 检索 13 批附件，https://www.cac.gov.cn/2024-04/02/c_1713729983803145.htm）；该产品未面向大陆公众提供服务，备案不适用。not in the CAC public registry (13 batch attachments searched 2026-10-20, https://www.cac.gov.cn/2024-04/02/c_1713729983803145.htm); the product does not serve the mainland public, so filing does not apply.

备案信息以网信办《生成式人工智能服务已备案信息》公示名单为准（按批次滚动更新，本站只抄编号不解读）；「大陆可直连」是本站从大陆网络直连实测的结果，不是厂商承诺。GitHub 类站点当日实测有波动，口径写在依据里。Filing status is quoted from the CAC public registry (updated batch by batch; this site copies the number and does not interpret it). "Direct access" is this site's own reachability measurement from a mainland network, not a vendor promise. GitHub-hosted sites fluctuated on the measurement day — the note says so.

固定坐标系Fixed coordinate system

11 个维度dimensions, 与同分区其他对象逐项可比each comparable item by item against others in the same section.

模型与开放条件Model & openness: 本身不调用模型。官方明说本 server 不打算成为有用的 server，而是给 MCP 客户端开发者做功能测试用。

实现了 prompts、tools、resources、sampling 等协议特性以展示 MCP 能力。
It calls no model itself. The official docs state outright that this server is not intended to be a useful server — it exists for MCP client developers to test features against.

It implements prompts, tools, resources, sampling and other protocol features to showcase MCP capabilities.
运行位置Where it runs: 本地 Node.js 进程，通过 stdio 通信。 2026-09-22 修复了会话断开时的订阅清理问题。
A local Node.js process communicating over stdio. A 2026-09-22 fix addressed subscription cleanup on session disconnect.
本地文件Local files: 测试用途，不提供实际文件访问能力。详细的资源与工具清单见仓库 docs/features.md。
For testing purposes; it provides no real file-access capability. The detailed resource and tool inventory is in the repo's docs/features.md.
关机后的任务Tasks after shutdown: 不支持。随客户端进程结束。
Not supported. It ends with the client process.
工具与扩展Tools & extensions: 共 19 个工具，本站已按仓库 docs/features.md 逐条核对（2026-10-08）：

echo、get-annotated-message、get-env、get-resource-links、

get-resource-reference、get-roots-list、gzip-file-as-resource、

get-structured-content、get-sum、get-tiny-image、

trigger-long-running-operation、toggle-simulated-logging、

toggle-subscriber-updates、trigger-elicitation-request、

trigger-url-elicitation、trigger-sampling-request、

simulate-research-query，以及 sampling / elicitation 的两个 async 变体。

另有 4 个 prompt 与一批 resource 模板（同见 features.md）。输出结构按演示目标设计，不适合直接消费。
19 tools in total; this site has checked them one by one against the repo's docs/features.md (2026-10-08):

echo, get-annotated-message, get-env, get-resource-links,

get-resource-reference, get-roots-list, gzip-file-as-resource,

get-structured-content, get-sum, get-tiny-image,

trigger-long-running-operation, toggle-simulated-logging,

toggle-subscriber-updates, trigger-elicitation-request,

trigger-url-elicitation, trigger-sampling-request,

simulate-research-query, plus the two async variants of sampling / elicitation.

There are also 4 prompts and a batch of resource templates (also in features.md). Output shapes are designed for demonstration targets, not fit for direct consumption.
上下文与记忆Context & memory: 无跨会话记忆。测试 server，不提供实用记忆能力。
No cross-session memory. A test server — it offers no practical memory capability.
权限与限制Permissions & limits: 不适用于生产环境，权限边界不是设计目标。官方定位是测试工具，未针对生产环境的权限收敛设计。
Not for production use; permission boundaries are not a design goal. The official positioning is a testing tool — its permission hardening was never designed for production.
适合什么任务Best for: 仅适合一件事：测试你的 MCP 客户端是否正确实现了协议。 不适合任何实际任务场景。
Fit for exactly one thing: testing whether your MCP client implements the protocol correctly. Not a fit for any real task scenario.
传输方式Transport: 支持 stdio（默认，npx 启动）。

仓库 README 另文档了两种远程形态（2026-10-08 核验）：

Streamable HTTP（npx @modelcontextprotocol/server-everything streamableHttp）

与 SSE（sse 子命令；官方标注自 2025-03-26 规范起已弃用）。
Supports stdio (default, launched via npx). The repo README documents two more remote forms (verified 2026-10-08): Streamable HTTP (npx @modelcontextprotocol/server-everything streamableHttp) and SSE (the sse subcommand; officially marked deprecated since the 2025-03-26 spec).
认证机制Authentication: 无独立认证层。不适用于生产环境—— 权限设计不是本 server 的目标。本条目不记录具体的认证机制，因为官方定位就是协议测试工具，生产环境的防护由使用者自行实现。
No separate authentication layer. Not for production use — permission design is not this server's goal. This entry records no concrete auth mechanism, because the official positioning is a protocol-testing tool; production safeguards are left to whoever deploys it.
权限范围Permission scope: 不适用于生产环境。作为测试工具，其权限范围与实际操作能力均未针对生产场景收敛。启用前请确认你的环境不会因此暴露风险。
Not for production use. As a testing tool, neither its permission scope nor its real operational capability has been narrowed for production scenarios. Before enabling it, make sure your environment is not exposed to risk as a result.

头号误解Top misconception

以为是可用的综合工具 server，官方明确说是测试 serverAssuming it is a usable all-in-one tool server — the official docs say it is a test server
在生产环境启用，官方定位就不是生产就绪Enabling it in production — it was never positioned as production-ready
以为工具越多越实用，这里的工具是为演示协议特性而非实用Assuming more tools means more usefulness — these tools demonstrate protocol features rather than serve real purposes

未知项清单Known unknowns

2026-10-08：工具清单已按仓库 docs/features.md 逐条核对（19 个工具 + 4 个 prompt）， transport 也已核到 README 的 Streamable HTTP / SSE 启动文档 —— 原降级原因消失，confidence 升回 verified。

协议特性覆盖的完整范围（features.md 已读；其余细节随 SDK 版本演进，以仓库为准）
SSE 子命令在新版规范下的维护状态（官方已标注弃用，未见移除计划）

2026-10-08: the tool list has been checked item by item against the repo's docs/features.md (19 tools + 4 prompts), and the transport has been verified against the README's Streamable HTTP / SSE launch docs — the original downgrade reason is gone; confidence is raised back to verified.

The full scope of protocol-feature coverage (features.md has been read; remaining details evolve with SDK versions — the repo is authoritative)
Maintenance status of the SSE subcommand under newer specs (officially marked deprecated; no removal plan seen)

证据来源Evidence sources

判断可回到以下一手源复核。本站核验日Every judgement can be rechecked against the primary sources below. Verified on 2026-10-23，内容更新日content updated on 2026-10-08。

类型Type	名称Name	链接Link
docs	MCP · Everything Server（官方声明为测试 server）MCP · Everything Server (officially declared a test server)	https://github.com/modelcontextprotocol/servers/tree/main/src/everything
docs	MCP · Everything Server Features（19 个工具逐条清单，2026-10-08 核对）MCP · Everything Server Features (itemized list of 19 tools, checked 2026-10-08)	https://github.com/modelcontextprotocol/servers/blob/main/src/everything/docs/features.md
changelog	MCP · Everything 目录变更历史MCP · Everything directory change history	https://github.com/modelcontextprotocol/servers/commits/main/src/everything
changelog	MCP · Servers ReleasesMCP · Servers Releases	https://github.com/modelcontextprotocol/servers/releases
repo	MCP · Servers 仓库 README（生产环境免责声明）MCP · Servers repo README (production-use disclaimer)	https://github.com/modelcontextprotocol/servers

实测记录Measured runs

本档未在真实客户端逐项跑通；工具清单与权限来自官方 README。

这个 server 的「实测」含义不同：要测的不是它能不能干活，而是你的 MCP 客户端能否正确处理它暴露的全部协议特性。测试清单见仓库 docs/features.md。

This site has not completed measured runs.

What "measurement" means for this server is different: what to test is not whether it can do work, but whether your MCP client correctly handles every protocol feature it exposes. The test checklist is in the repo's docs/features.md.

官方定位（原文）Official positioning (original wording)

This MCP server attempts to exercise all the features of the MCP protocol. It is not intended to be a useful server, but rather a test server for builders of MCP clients. It implements prompts, tools, resources, sampling, and more to showcase MCP capabilities.

翻译：本 server 试图覆盖 MCP 协议的所有特性。 它不打算成为有用的 server，而是给 MCP 客户端构建者的测试 server。它实现了 prompts、tools、resources、sampling 等，以展示 MCP 能力。

This MCP server attempts to exercise all the features of the MCP protocol. It is not intended to be a useful server, but rather a test server for builders of MCP clients. It implements prompts, tools, resources, sampling, and more to showcase MCP capabilities.

为什么仍然收录Why we still include it

一个对比站如果只收录「好用」的工具，会漏掉一件重要的事： 生态里有哪些东西是为了别的目的存在的。

收录它的价值：

读者	得到什么
MCP 客户端开发者	一个协议覆盖最全的测试靶子
MCP server 开发者	参考实现，看协议特性怎么用
普通读者	学会区分「reference server」和「可用 server」

但它绝不该被当实用工具推荐。

A comparison site that only lists "handy" tools would miss something important: what exists in the ecosystem for other purposes.

Its inclusion value:

Reader	What they get
MCP client developers	A test target with the broadest protocol coverage
MCP server developers	A reference implementation showing how protocol features are used
General readers	Learning to tell a "reference server" from a "usable server"

But it must never be recommended as a practical tool.

变更记录说明Change-log notes

日期	内容
2026-09-22	会话断开时清理订阅
2026-08-28	移除 template URI 校验与订阅清理里的死代码

09-22 那条是实质修复：订阅没在会话断开时清理会导致资源泄漏。

Date	Content
2026-09-22	Clean up subscriptions on session disconnect
2026-08-28	Remove template URI validation and dead code in subscription cleanup

The 09-22 entry is a substantive fix: subscriptions not cleaned up on session disconnect cause a resource leak.

与其他 reference server 的区别How it differs from the other reference servers

server	定位	能用于实际任务
`filesystem`	参考实现	✅
`git`	参考实现	✅
`memory`	参考实现	✅
`sequential-thinking`	参考实现	✅
`fetch`	参考实现	△ 需评估安全
`time`	参考实现	✅
`everything`	测试工具	❌

这一列对比本身就是本站的价值：光看「都是官方 servers 仓库里的」，会以为它们性质相同。实际完全不同。

server	Positioning	Usable for real tasks
`filesystem`	Reference implementation	✅
`git`	Reference implementation	✅
`memory`	Reference implementation	✅
`sequential-thinking`	Reference implementation	✅
`fetch`	Reference implementation	△ needs a security assessment
`time`	Reference implementation	✅
`everything`	Testing tool	❌

This very comparison column is part of the site's value: judging only by "they are all in the official servers repo" makes them seem identical in nature. They are completely different.