Dynamic Db Server
FreeNot checkedEnables AI agents to dynamically register and query MySQL-compatible databases at runtime with built-in destructive SQL protection.
About
Enables AI agents to dynamically register and query MySQL-compatible databases at runtime with built-in destructive SQL protection.
README
动态注册的 MySQL 兼容数据库 MCP Server. 运行时注册数据库连接, 执行 SQL 时自带破坏性语句拦截.
为什么造这个轮子
传统的数据库 MCP Server 要求把所有连接配置事先写进环境变量或配置文件. 这在以下场景不现实:
- 有几十/上百个数据库实例
- 实例 IP 经常变动
- 不想维护一份静态配置文件
- 需要 AI 动态发现并连接数据库
dynamic-db-mcp-server 翻转了模型: 连接在运行时通过工具调用注册. AI 提供 host/port/user/password, Server 测试连接, 缓存它, 返回 instance_id 供后续查询使用.
特性
- 动态注册 — 无需预配置连接列表, 运行时注册任意 MySQL 兼容数据库
- 连接复用 — 注册的连接会被缓存, 不重复握手
- SQL 安全 — 只读查询 (SELECT/SHOW/WITH/EXPLAIN/DESC) 直接执行; 破坏性语句 (DROP/DELETE/UPDATE/INSERT/ALTER/TRUNCATE) 需显式确认; 危险语句 (OUTFILE/DUMPFILE/LOAD_FILE/SHUTDOWN) 一律拒绝
- MySQL 协议兼容 — 适用于 MySQL, MariaDB, TDSQL, TDSQL-C 等任何使用 MySQL 线协议的数据库
- 配置无敏感数据 — 无硬编码凭据, 所有连接均为运行时提供
- 无状态 — 连接存在于 MCP 进程内存中, 重启即清空
快速开始
安装
pip install dynamic-db-mcp-server
或通过 uv / uvx 运行:
uvx dynamic-db-mcp-server
在 MCP 客户端中配置
在你的 MCP 客户端配置中添加 (如 opencode.jsonc, claude_desktop_config.json):
{
"mcpServers": {
"dynamic-db": {
"command": "uvx",
"args": ["dynamic-db-mcp-server"]
}
}
}
或从源码运行:
{
"mcpServers": {
"dynamic-db": {
"command": "python",
"args": ["-m", "dynamic_db_mcp_server"]
}
}
}
使用流程
1. register_instance(name="my-db", host="10.0.0.5", port=3306, user="root", password="***")
→ {"instance_id": "my-db", "status": "connected"}
→ 连接已测试并缓存
2. list_instances()
→ [{"instance_id": "my-db", "host": "10.0.0.5", "port": 3306, "user": "root", "status": "connected"}]
3. execute_sql(instance_id="my-db", sql="SELECT 1")
→ {"columns": ["1"], "rows": [[1]], "row_count": 1}
4. execute_sql(instance_id="my-db", sql="DROP TABLE temp_test")
→ {"error": "Destructive operation requires confirmation", "sql_type": "DESTRUCTIVE", "statement": "DROP"}
5. execute_sql(instance_id="my-db", sql="DROP TABLE temp_test", confirm_destructive=true)
→ {"affected_rows": 0}
工具列表
| 工具 | 说明 |
|---|---|
register_instance |
注册数据库连接 (用 SELECT 1 测试, 缓存) |
list_instances |
列出所有已注册实例 (不返回密码) |
execute_sql |
执行 SQL. 只读直接通过, 破坏性需 confirm_destructive=true |
list_databases |
列出实例上的所有数据库 |
list_tables |
列出指定库的表 (含行数和大小) |
get_table_detail |
查看表结构 (列信息 + SHOW CREATE TABLE DDL) |
SQL 安全策略
| 类别 | 关键字 | 行为 |
|---|---|---|
| 只读 | SELECT, SHOW, WITH, EXPLAIN, DESC, DESCRIBE | 直接执行 |
| 破坏性 | DROP, TRUNCATE, DELETE, UPDATE, INSERT, ALTER, RENAME, GRANT, REVOKE, CREATE | 需 confirm_destructive=true |
| 危险 | OUTFILE, DUMPFILE, LOAD_FILE, SHUTDOWN, KILL | 一律拒绝 |
架构
AI Agent
│
│ MCP 协议 (stdio)
▼
┌──────────────────────────────────────┐
│ dynamic-db-mcp-server │
│ │
│ FastMCP Server ──→ 6 个工具 │
│ │ │
│ ConnectionManager │
│ - register / get / list │
│ - ping + 自动重连 │
│ - per-instance threading.Lock │
│ │ │
│ SqlValidator │
│ - 关键字分类 │
│ - 只读 / 破坏性 / 危险 │
│ │ │
│ DbExecutor (pymysql) │
│ - execute / list / schema │
└──────────────────────────────────────┘
│
│ TCP 3306
▼
MySQL / MariaDB / TDSQL / TDSQL-C
License
MIT
Install Dynamic Db Server in Claude Desktop, Claude Code & Cursor
unyly install dynamic-db-mcp-serverInstalls into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.
First time? Get the CLI: curl -fsSL https://unyly.org/install | sh
Or configure manually
Run in your terminal:
claude mcp add dynamic-db-mcp-server -- uvx dynamic-db-mcp-serverFAQ
Is Dynamic Db Server MCP free?
Yes, Dynamic Db Server MCP is free — one-click install via Unyly at no cost.
Does Dynamic Db Server need an API key?
No, Dynamic Db Server runs without API keys or environment variables.
Is Dynamic Db Server hosted or self-hosted?
A hosted option is available: Unyly runs the server in the cloud, no local setup required.
How do I install Dynamic Db Server in Claude Desktop, Claude Code or Cursor?
Open Dynamic Db Server on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
Related MCPs
wenb1n-dev/SmartDB_MCP
A universal database MCP server supporting simultaneous connections to multiple databases. It provides tools for database operations, health analysis, SQL optim
by wenb1n-devPostgres Server
This server enables interaction with PostgreSQL databases through the Model Context Protocol, optimized for the AWS Bedrock AgentCore Runtime. It provides tools
by madhurprashPostgres
Query your database in natural language
by AnthropicPostgreSQL
Read-only database access with schema inspection.
by modelcontextprotocolCompare Dynamic Db Server with
Not sure what to pick?
Find your stack in 60 seconds
Author?
Embed badge for your README
Browse similar
All data MCPs
