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Directory / devtools-mcp
devtools-mcp
by github.com · https://pianam.cn/devtools-mcp/mcp
MCP server with 5 offline developer tools: UUID, timestamp, unit conversion, JSON tools and QR code.
Partial: 8 of 11 checks · 9 Nov 2026
At a glance
- Runs where
- On their server. What you send to it goes to them.
- What you need
- Nothing: it answered without a login
- Tools
- 7 tools
- Its own safety labels
- 0 read-only, 7 with no label
- Memory it takes
- About 990 tokens of your AI's memory, just for its tool descriptions
Tokens are an estimate: the characters in its tool names, descriptions and inputs, divided by 4. The exact number depends on your AI model. Safety labels are what the server says about itself. From our latest test, 9 Nov 2026.
Is devtools-mcp server safe?
- None of the hidden-instruction wordings we know were found in its 7 tool descriptions.
- 0 of its 7 tools are labeled read-only; the others may change or send things.
- Overall it scored 93/100 on 9 Nov 2026.
A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.
What this test does not check
- Its source code and packages.
- What a tool quietly does behind the scenes, such as writing a file or calling another service.
- Instructions hidden inside live tool answers. We only look for those in tool descriptions.
- Hidden instructions worded in a way our list doesn't know yet.
- Tools that could change something. Those are read, never run.
What QAmcp can and can't see · How to tell if an MCP server is safe · Hidden instructions · Prompt injection
Known security advisories
None found in GitHub Security Advisories on 10 Nov 2026.
That means none were published there, not that there are no problems. QAmcp tests how a server behaves. It does not scan source code.
What it can do
7 tools, in the server's own words.
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。
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…
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…
format_jsonJSON 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。
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、…
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…
resolve_dnsDNS 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…
Test results
Safe mode: only tools labeled read-only were run. How the test works
- !Tools are labeled safe or dangerousnote
1 warning
- !7 of 7 tools have no safety label (read-only or dangerous): generate_uuid, convert_timestamp, convert_unit, format_json, generate_qr, query_npm_version, resolve_dns
- !Follows MCP best practices (not scored yet)note
2 tips (not scored)
- !7 tools not labeled read-only don't say whether running them twice is safe (idempotentHint): generate_uuid, convert_timestamp, convert_unit, format_json, generate_qr, query_npm_version and 1 more
- !7 tools don't say whether they reach outside services like the web (openWorldHint): generate_uuid, convert_timestamp, convert_unit, format_json, generate_qr, query_npm_version and 1 more
- ✓ConnectsConnected in 260 mspass
- ✓Ready for the newest MCP versionUses the latest MCP version (2026-07-28)pass
- ✓Lists its toolsFound 7 toolspass
- ✓Every tool is describedAll 7 tools and their inputs are describedpass
- ✓No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.pass
- ✓Fast enoughpass
All good
- ✓Connecting took 260 ms
- ✓Listing tools took 262 ms
- –Tools work with good inputsnot tested
Not tested
- –generate_uuid: Not run: no safety label (if you own this server, test again in owner mode)
- –convert_timestamp: Not run: no safety label (if you own this server, test again in owner mode)
- –convert_unit: Not run: no safety label (if you own this server, test again in owner mode)
- –format_json: Not run: no safety label (if you own this server, test again in owner mode)
- –generate_qr: Not run: no safety label (if you own this server, test again in owner mode)
- –query_npm_version: Not run: no safety label (if you own this server, test again in owner mode)
- –resolve_dns: Not run: no safety label (if you own this server, test again in owner mode)
- –Bad inputs give a clean errorNot testednot tested
- –Tools work togetherNo safe tool returned data to start a chain from, so chains were not tested (not counted either way)not tested
- –No secrets leakedNo error messages to checknot tested
Test it yourself
Free and open source. Same checks, same score.
npx qamcp-cli https://pianam.cn/devtools-mcp/mcpShow this score on GitHub
Free for every server in the directory. Paste this into your README: the badge shows the score from our latest test.
[](https://qamcp.dev/s/cn-pianam-devtools-mcp.html)Score over time
- 9 Nov 202693
One test so far. New tests will show here.
Reviews
Coming soon: reviews from people who use devtools-mcp, signed in with GitHub, one per person. Reviews never change the score.
QAmcp Monitor tests it every hour and emails you when it goes down, the score drops, a tool changes or a secret leaks. Free for 1 server, no card.
Have a concern, or want it removed? Ask us and we'll take it off the list. How the directory works