mcp-micro-tools
Provides a set of micro-tools (time calculation, regex, encoding, JSON diff, etc.) for LLM agents to handle deterministic, precision tasks that models often get wrong.
README
mcp-micro-tools
<div align="center">
Agent 的瑞士军刀 —— 把 LLM 不擅长的微任务交给它
</div>
为什么需要这个?
大模型在处理自然语言时很强,但有些"精确计算"类的任务经常出错:
| 任务 | 模型表现 | mcp-micro-tools |
|---|---|---|
| "3月15日 + 45个工作日是哪天" | 经常算错 | time_calc("2026-03-15 + 45 days") ✅ |
| 复杂正则提取 | 编造正则、幻觉匹配 | regex_test() 真实 Python re 引擎 ✅ |
| Base64 解码 | 偶尔编造内容 | decode() 精确计算 ✅ |
| URL query 参数提取 | 可能遗漏 | url_parse() 结构化输出 ✅ |
| JSON 深度对比 | 100行以上必丢字段 | json_diff() 递归精确对比 ✅ |
一句话:把确定性计算还给工具,把不确定性推理留给模型。
安装
pip install mcp-micro-tools
需要 Python 3.10+。
配置 AI Agent
Claude Code / Claude Desktop
{
"mcpServers": {
"micro-tools": {
"command": "python",
"args": ["-m", "mcp_micro_tools.server"]
}
}
}
Codex / Cursor / Continue
{
"mcpServers": {
"micro-tools": {
"command": "python",
"args": ["-m", "mcp_micro_tools.server"]
}
}
}
OpenClaw
在 openclaw.json 中添加:
{
"mcp_servers": [
{
"name": "micro-tools",
"command": "python",
"args": ["-m", "mcp_micro_tools.server"]
}
]
}
工具列表
| 工具 | 功能 | 示例 |
|---|---|---|
time_calc |
日期时间运算 | "now + 3 weeks - 1 day" |
timezone_convert |
时区转换 | UTC → Asia/Shanghai |
regex_test |
正则测试(findall/search/match/split) | 提取所有邮箱 |
regex_replace |
正则替换 | 格式化电话号码 |
encode |
编码 | base64 / URL / hex / HTML |
decode |
解码 | base64 / URL / hex / HTML |
json_query |
JSON 路径查询 | users.0.email |
json_diff |
JSON 深度对比 | 递归找出所有差异 |
url_parse |
URL 解析 | scheme / host / path / query |
hash_text |
哈希计算 | md5 / sha1 / sha256 / sha512 |
generate_uuid |
UUID 生成 | 单个或批量 |
使用示例
场景 1:时间计算
User: "合同签于 2026-03-15,90 个工作日后是哪天?"
Agent 调用 → time_calc("2026-03-15 + 90 days")
结果 → 2026-06-13T00:00:00
场景 2:正则提取
User: "从这段日志里提取所有 IP 地址"
Agent 调用 → regex_test("\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}", log_text)
结果 → ["192.168.1.1", "10.0.0.5", ...]
场景 3:JSON 对比
User: "对比这两个 API 返回的 JSON,看看少了什么字段"
Agent 调用 → json_diff(api_response_a, api_response_b)
结果 → {"users[2].email": {"removed": "..."}, "metadata.version": {"changed": {...}}}
场景 4:编码解码
User: "这段 Base64 解码出来是什么?"
Agent 调用 → decode("SGVsbG8gV29ybGQ=", "base64")
结果 → Hello World
设计哲学
- 零依赖(核心):除
mcp和python-dateutil外,只用 Python 标准库 - 单文件:核心逻辑一个
server.py,方便审查和 fork - 无状态:每次调用独立,不存任何数据
- 静默输出:只返回结果,不废话
扩展
欢迎贡献更多微工具。一个好的微工具满足:
- LLM 天然不擅长(精确计算、结构化操作)
- 输入输出明确(可 JSON 序列化)
- 单次调用完成(无状态)
PR 直接开,README 底部留个 Credits 就够。
License
MIT
相关项目
- awesome-mcp-servers — MCP Server 合集
- Superpowers — Agent Skill 框架
- OpenClaw — 跨平台 AI 助手
- claw-code — Claude Code Rust 实现
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