Devtools MCP Server

by pianam Your server? Claim it

answering

Devtools MCP is answering right now. Last checked 15 min ago. It exposes 7 tools. Last commit 6 Sep 2026.

MCP server with 5 offline developer tools: UUID, timestamp, unit conversion, JSON tools and QR code.

Uptime history 9 hours of history

9 hours agonow

100.0%

Uptime 24h

31 of 31 checks

Tools

read from the server

1195 ms

Response time

average over 24h

Stars

last commit 6 Sep 2026

Nothing serious here today

Today is the operative word: we check Devtools MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 15 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add devtools-mcp --transport http https://pianam.cn/devtools-mcp/mcp

Settings → Connectors → Add custom connector, then paste this address

https://pianam.cn/devtools-mcp/mcp

~/.codex/config.toml

[mcp_servers.devtools-mcp]
url = "https://pianam.cn/devtools-mcp/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "devtools-mcp": {
      "url": "https://pianam.cn/devtools-mcp/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "devtools-mcp": {
      "type": "http",
      "url": "https://pianam.cn/devtools-mcp/mcp"
    }
  }
}

Available tools 7

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

convert

convert_timestamp

时间戳双向转换，时区统一北京时间(UTC+8)。传入 Unix 时间戳（整数秒或毫秒，自动识别；也接受数字字符串）返回 ISO 8601 北京时间字符串；传入日期/时间字符串（如 2026-09-05、2026-09-05 10:30:00、2026-09-05T10:30:00+08:00）返回 Unix 秒/毫秒时间戳；不传 value 返回当前时间的两种格式。

convert_unit

单位换算，支持四类：长度(m/km/cm/mm/mile/foot/inch，含毫米/厘米/英里/英尺/英寸)、重量(kg/g/mg/t/lb/oz，含克/磅/盎司)、温度(c/f/k，摄氏度/华氏度/开尔文，自动做偏移换算)、数据存储(B/KB/MB/GB/TB/PB，按1024二进制换算)。不支持的单位或跨类别换算（如米换算成千克）会返回清晰错误。

generate

generate_qr

生成二维码。默认 format='svg' 返回 SVG 矢量图字符串（纯标准库生成，可直接保存为 .svg 文件，AI agent 可直接写文件）；format='png' 时返回 PNG 图片的 base64 编码和 data URI（需服务器安装 Pillow，未安装会返回提示）。content 支持 URL、纯文本、WiFi 配置（如 WIFI:T:WPA;S:网络名;P:密码;;）等任意字符串，上限 2000 字节。CPU 密集，走线程池不阻塞事件循环。

generate_uuid

生成 UUID（通用唯一识别码）。支持 v4 随机 UUID（默认）和 v5 命名空间 UUID（SHA-1 确定性生成，需提供 namespace 和 name）。count 可一次生成多个（1~1000）。namespace 支持预定义名 dns/url/oid/x500 或完整 UUID 字符串。

format

format_json

JSON 字符串处理。action 支持：format（美化缩进2格，中文不转义）、minify（压缩为单行去空白）、validate（仅校验合法性，非法时返回错误行号、列号、位置指针和上下文片段）。输入 data 必须是字符串。

npm

query_npm_version

查询 npm 包的最新版本信息。输入 npm 包名（如 react、vue、express、@vue/cli），返回最新版本号 latest_version、该版本发布时间 published_at（UTC ISO 8601）、包描述 description、开源协议 license，以及主页/仓库地址等。数据源优先官方 registry.npmjs.org，失败自动兜底淘宝镜像 registry.npmmirror.com（国内更快）。包不存在返回明确的 404 提示。网络 I/O 走线程池不阻塞事件循环。

resolve

resolve_dns

DNS 域名解析（DoH，JSON API）。输入域名 name（如 baidu.com、www.qq.com）和记录类型 type（A 默认/AAAA/CNAME/MX/TXT），返回解析记录列表（每条含 name、type、ttl、data；MX 数据为优先级+邮件交换主机，TXT 为文本记录）。数据源优先阿里 DoH（dns.alidns.com，国内快），失败自动兜底 Cloudflare DoH。域名不存在返回 NXDOMAIN 提示；域名存在但无该类型记录时返回空列表并附说明。网络 I/O 走线程池不阻塞事件循环。

Endpoints

URL	Transport	State	Latency	Checked
https://pianam.cn/devtools-mcp/mcp	streamable-http	answering	765 ms	15 min ago

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Devtools MCP — questions

Answers built from our own checks of this server.

What can Devtools MCP do?

It exposes 7 tools, read directly from the server on our last check. Among them: convert_timestamp, convert_unit, format_json, generate_qr, generate_uuid, query_npm_version and 1 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is Devtools MCP mostly used for?

Its tools cluster around convert and generate. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is Devtools MCP working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 31 of 31 checks got a reply (100.0%), average response time 1195 ms. The bar chart above shows every period we have measured.

How do I connect Devtools MCP?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Devtools MCP need an API key?

No. Devtools MCP completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 7 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Devtools MCP?

It answers our handshake in 1195 ms on average, which is faster than 5% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Devtools MCP open source?

The code is open source: it is published under the MIT licence, written in Python and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at pianam.cn, which runs on its operator's own terms.