MCP Server for Oracle

A Model Context Protocol server that provides access to Oracle databases with fine-grained access control. Supports multiple databases, access modes, and table-level permissions.

Features

• Multi-database support: Connect to multiple Oracle databases simultaneously

• Access control: readonly, readwrite, full modes per database

• Table-level permissions: Whitelist/blacklist with wildcards and regex

• Read-only transaction protection: Database-level safety for readonly mode

• Backward compatible: Works with single database environment variables

Related MCP server: Database Bridge MCP Server

Components

Tools

Resources

• oracle://connections: List of database connections with access modes

• oracle://{db}/tables/{table}/schema: Table schema

Prompts

• oracle_usage_guide: Dynamic guide based on configured databases

Configuration

Config File

Create ~/.mcp_oracle/databases.json:

{
  "databases": [
    {
      "name": "prod",
      "user": "...",
      "password": "...",
      "connectString": "...",
      "accessMode": "readonly"
    },
    {
      "name": "dev",
      "user": "...",
      "password": "...",
      "connectString": "...",
      "accessMode": "readwrite",
      "allowedTables": ["LOG_*", "TMP_*", "/^TEST_.*/"]
    }
  ]
}

Access Modes

Table Patterns

Environment Variables

Usage Example

User: "查询 prod 库中的用户表"
→ oracle_query(database="prod", sql="SELECT * FROM users")

User: "在 dev 库的 LOG_TEST 表插入一条记录"
→ oracle_execute(database="dev", sql="INSERT INTO LOG_TEST ...", confirm=true)

Security

• readonly mode: Uses SET TRANSACTION READ ONLY for database-level protection

• SQL validation: Validates statement type before execution

• Table validation: Checks whitelist/blacklist before write operations

• Confirmation required: Write operations require confirm=true

License

MIT License