nile-mcp

A Model Context Protocol (MCP) server implementation for Nile database platform. This server allows LLM applications to interact with Nile platform through a standardized interface.

Features

• Database Management: Create, list, get details, and delete databases
• Credential Management: Create and list database credentials
• Region Management: List available regions for database creation
• SQL Query Support: Execute SQL queries directly on Nile databases
• MCP Protocol Support: Full implementation of the Model Context Protocol
• Type Safety: Written in TypeScript with full type checking
• Error Handling: Comprehensive error handling and user-friendly error messages
• Test Coverage: Comprehensive test suite using Jest
• Environment Management: Automatic loading of environment variables from .env file
• Input Validation: Schema-based input validation using Zod

Installation

Install the stable version:

For the latest alpha/preview version:

Installing via Smithery

To install nile-mcp-server for Claude Desktop automatically via Smithery:

Manual Installation

Starting the Server

There are several ways to start the server:

1. Direct Node Execution:
   node dist/index.js
2. NPM Script:
   npm start
3. Development Mode (with auto-rebuild):
   npm run dev

The server will start and listen for MCP protocol messages. You should see startup logs indicating:

• Environment variables loaded
• Server instance created
• Tools initialized
• Transport connection established

To stop the server, press Ctrl+C.

Verifying the Server is Running

When the server starts successfully, you should see logs similar to:

If you see these logs, the server is ready to accept commands from Claude Desktop.

Configuration

Create a .env file in the root directory with your Nile credentials:

To create a Nile API key, log in to your Nile account, click Workspaces in the top-left, select your workspace, and navigate to the Security section in the left menu.

Using with Claude Desktop

Setup

1. Install Claude Desktop if you haven't already
2. Build the project:
   npm run build
3. Open Claude Desktop
4. Go to Settings > MCP Servers
5. Click "Add Server"
6. Add the following configuration:

Replace:

• /path/to/your/nile-mcp-server with the absolute path to your project directory
• your_api_key_here with your Nile API key
• your_workspace_slug with your Nile workspace slug

Using with Cursor

Setup

1. Install Cursor if you haven't already
2. Build the project:
   npm run build
3. Open Cursor
4. Go to Settings (⌘,) > Features > MCP Servers
5. Click "Add New MCP Server"
6. Configure the server:
   • Name: nile-database (or any name you prefer)
   • Command:
     env NILE_API_KEY=your_key NILE_WORKSPACE_SLUG=your_workspace node /absolute/path/to/nile-mcp-server/dist/index.js
     Replace:
     • your_key with your Nile API key
     • your_workspace with your Nile workspace slug
     • /absolute/path/to with the actual path to your project
7. Click "Save"
8. You should see a green indicator showing that the MCP server is connected
9. Restart Cursor for the changes to take effect

Server Modes

The server supports two operational modes:

STDIO Mode (Default)

The default mode uses standard input/output for communication, making it compatible with Claude Desktop and Cursor integrations.

SSE Mode

Server-Sent Events (SSE) mode enables real-time, event-driven communication over HTTP.

To enable SSE mode:

1. Set MCP_SERVER_MODE=sse in your .env file
2. The server will start an HTTP server (default port 3000)
3. Connect to the SSE endpoint: http://localhost:3000/sse
4. Send commands to: http://localhost:3000/messages

Example SSE usage with curl:

Example Prompts

After setting up the MCP server in Cursor, you can use natural language to interact with Nile databases. Here are some example prompts:

Database Management

Creating Tables

Querying Data

Schema Management

Available Tools

The server provides the following tools for interacting with Nile databases:

Database Management

1. create-database
   • Creates a new Nile database
   • Parameters:
     • name (string): Name of the database
     • region (string): Either AWS_US_WEST_2 (Oregon) or AWS_EU_CENTRAL_1 (Frankfurt)
   • Returns: Database details including ID, name, region, and status
   • Example: "Create a database named 'my-app' in AWS_US_WEST_2"
2. list-databases
   • Lists all databases in your workspace
   • No parameters required
   • Returns: List of databases with their IDs, names, regions, and status
   • Example: "List all my databases"
3. get-database
   • Gets detailed information about a specific database
   • Parameters:
     • name (string): Name of the database
   • Returns: Detailed database information including API host and DB host
   • Example: "Get details for database 'my-app'"
4. delete-database
   • Deletes a database
   • Parameters:
     • name (string): Name of the database to delete
   • Returns: Confirmation message
   • Example: "Delete database 'my-app'"

Credential Management

1. list-credentials
   • Lists all credentials for a database
   • Parameters:
     • databaseName (string): Name of the database
   • Returns: List of credentials with IDs, usernames, and creation dates
   • Example: "List credentials for database 'my-app'"
2. create-credential
   • Creates new credentials for a database
   • Parameters:
     • databaseName (string): Name of the database
   • Returns: New credential details including username and one-time password
   • Example: "Create new credentials for database 'my-app'"
   • Note: Save the password when it's displayed, as it won't be shown again

Region Management

1. list-regions
   • Lists all available regions for creating databases
   • No parameters required
   • Returns: List of available AWS regions
   • Example: "What regions are available for creating databases?"

SQL Query Execution

1. execute-sql
   • Executes SQL queries on a Nile database
   • Parameters:
     • databaseName (string): Name of the database to query
     • query (string): SQL query to execute
     • connectionString (string, optional): Pre-existing connection string to use for the query
   • Returns: Query results formatted as a markdown table with column headers and row count
   • Features:
     • Automatic credential management (creates new if not specified)
     • Secure SSL connection to database
     • Results formatted as markdown tables
     • Detailed error messages with hints
     • Support for using existing connection strings
   • Example: "Execute SELECT * FROM users LIMIT 5 on database 'my-app'"

Resource Management

1. read-resource
   • Reads schema information for database resources (tables, views, etc.)
   • Parameters:
     • databaseName (string): Name of the database
     • resourceName (string): Name of the resource (table/view)
   • Returns: Detailed schema information including:
     • Column names and types
     • Primary keys and indexes
     • Foreign key relationships
     • Column descriptions and constraints
   • Example: "Show me the schema for the users table in my-app"
2. list-resources
   • Lists all resources (tables, views) in a database
   • Parameters:
     • databaseName (string): Name of the database
   • Returns: List of all resources with their types
   • Example: "List all tables in my-app database"

Tenant Management

1. list-tenants
   • Lists all tenants in a database
   • Parameters:
     • databaseName (string): Name of the database
   • Returns: List of tenants with their IDs and metadata
   • Example: "Show all tenants in my-app database"
2. create-tenant
   • Creates a new tenant in a database
   • Parameters:
     • databaseName (string): Name of the database
     • tenantName (string): Name for the new tenant
   • Returns: New tenant details including ID
   • Example: "Create a tenant named 'acme-corp' in my-app"
3. delete-tenant
   • Deletes tenants in the database
   • Parameters:
     • databaseName (string): Name of the database
     • tenantName (string): Name for the tenant
   • Returns: Success if the tenant is deleted
   • Example: "Delete tenant named 'acme-corp' in my-app"

Example Usage

Here are some example commands you can use in Claude Desktop:

Response Format

All tools return responses in a standardized format:

• Success responses include relevant data and confirmation messages
• Error responses include detailed error messages and HTTP status codes
• SQL query results are formatted as markdown tables
• All responses are formatted for easy reading in Claude Desktop

Error Handling

The server handles various error scenarios:

• Invalid API credentials
• Network connectivity issues
• Invalid database names or regions
• Missing required parameters
• Database operation failures
• SQL syntax errors with helpful hints
• Rate limiting and API restrictions

Troubleshooting

1. If Claude says it can't access the tools:
   • Check that the server path in the configuration is correct
   • Ensure the project is built (npm run build)
   • Verify your API key and workspace slug are correct
   • Restart Claude Desktop
2. If database creation fails:
   • Check your API key permissions
   • Ensure the database name is unique in your workspace
   • Verify the region is one of the supported options
3. If credential operations fail:
   • Verify the database exists and is in the READY state
   • Check that your API key has the necessary permissions

Development

Project Structure

Key Files

• server.ts: Main server implementation with tool registration and transport handling
• tools.ts: Implementation of all database operations and SQL query execution
• types.ts: TypeScript interfaces for database operations and responses
• logger.ts: Structured logging with daily rotation and debug support
• index.ts: Server startup and environment configuration
• server.test.ts: Comprehensive test suite for all functionality

Development

Development Scripts

The following npm scripts are available:

• npm run build: Compiles TypeScript to JavaScript
• npm start: Starts the server in production mode
• npm run dev: Starts the server in development mode with auto-rebuild
• npm test: Runs the test suite
• npm run lint: Runs ESLint for code quality checking
• npm run clean: Removes build artifacts

Testing

The project includes a comprehensive test suite that covers:

• Tool registration and schema validation
• Database management operations
• Connection string generation
• SQL query execution and error handling
• Response formatting and error cases

Run the tests with:

Logging

The server uses structured logging with the following features:

• Daily rotating log files
• Separate debug logs
• JSON formatted logs with timestamps
• Console output for development
• Log categories: info, error, debug, api, sql, startup

License

MIT License - See LICENSE for details.

Related Links

• Model Context Protocol
• Nile Database
• Claude Desktop
• Cursor