cn.pianam.mcp/devtools-mcp
https://mcp.pianam.cn/devtools-mcp/mcp ↗
Description
Developer toolkit: UUID, timestamp, unit conversion, JSON tools, and QR code (SVG). Free.
What our measurements say
cn.pianam.mcp/devtools-mcp is a remote MCP server published at mcp.pianam.cn. It has been probed 6 times since 9/12/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 939 ms, a delay an agent will notice. It offers a narrow, focused set of 7 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Clear error handling for invalid inputs (e.g., convert_unit returns explicit errors for unsupported units).
- Comprehensive tool coverage (UUID, timestamp, unit conversion, JSON formatting, QR code, NPM version lookup, DNS resolution).
Weaknesses
- Tool names and descriptions are in Chinese, reducing compatibility with English-speaking agents.
- Parameters like 'namespace' and 'name' in generate_uuid have type 'null' with no clarification on expected input format.
- Ambiguous parameter definitions (e.g., 'value' in convert_timestamp has type 'null' without specifying accepted formats).
generate_uuid— Parameters 'namespace' and 'name' have undefined types (null) with no input format clarification.convert_timestamp— Parameter 'value' has type 'null' without specifying accepted formats (e.g., string, numeric).resolve_dns— Parameter 'type' has type 'null' without listing valid DNS record types (A, AAAA, CNAME, etc.).
Verdict
Event narrative
Sign up free to generateSchema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test not run this round
- Cold-start: cold 176ms → warm 178ms (penalty 0ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
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。
versionstringcountintegernamespacename
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。
valuetostring
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。
valuenumberrequiredfrom_unitstringrequiredto_unitstringrequired
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。
datastringrequiredactionstring
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。
contentstringrequiredformatstring
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。
packagestringrequired
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 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。
namestringrequiredtypestring
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Legacy
Get your badge
Add this badge to your README — it updates automatically as measurements change.
[](https://mcpmetrics.io/servers/cn-pianam-mcp-devtools-mcp)<a href="https://mcpmetrics.io/servers/cn-pianam-mcp-devtools-mcp"><img src="https://mcpmetrics.io/badge/cn.pianam.mcp/devtools-mcp/era.svg" alt="mcpmetrics"></a>You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.
Sign up free to seeSimilar MCP servers
The catalog entries whose name and description are closest to this one, found with the same index the search box uses.
- UTF-16 code-unit count, text discardedagent-observatory-sensor.nolimit-observatory.workers.dev
UTF-16 code-unit count, text discarded
- Superflow Free Toolsusesuperflow.ai
19 free website QA and AI-visibility tools. Remote HTTP MCP, no account, no API key.
- GadgetHumans API Hub — 334+ Free Toolsapi.gadgethumans.com
334+ free MCP tools: weather, crypto, search, DNS, geocoding, QR codes, passwords, UUIDs, hashes, math, currency, SSL checks, JWT decode, AI text tools, health calculators, code analysis, ciphers, data conversion, web scraping, RSS, reference data, and more. One install, zero API keys.
- AI SENSE Free Public Toolsaisenseapi.com
28 public tools for queues, inboxes, webhooks, approvals and temporary workflows. Two resources.
- drwho.me developer toolsdrwho.me
Remote MCP server: 10 developer utilities (base64, JWT, DNS, UUID, URL, JSON, UA, IP lookup).
- Craftery Developer Toolscraftery.dev
Developer utilities: color conversion, WCAG contrast, timestamps, UUIDs, and hashing.
Comments
Sign in to write a comment
No comments yet. Be the first.