# Clone the repository
git clone https://github.com/aashari/boilerplate-mcp-server.git
cd boilerplate-mcp-server

# Install dependencies
npm install

# Build the project
npm run build

# Run in different modes:

# 1. CLI Mode - Execute commands directly
npm run cli -- get-ip-details 8.8.8.8
npm run cli -- get-ip-details                                            # Get your current IP
npm run cli -- get-ip-details 1.1.1.1 -e                                 # With extended data
npm run cli -- get-ip-details 8.8.8.8 --jq "{ip: query, country: country}"  # JMESPath filter
npm run cli -- get-ip-details 8.8.8.8 -o json                            # JSON output

# 2. STDIO Transport - For AI assistant integration (Claude Desktop, Cursor)
npm run mcp:stdio

# 3. HTTP Transport - For web-based integrations
npm run mcp:http

# 4. Development with MCP Inspector
npm run mcp:inspect                         # Auto-opens browser with debugging UI

status: success
query: 8.8.8.8
country: United States
city: Ashburn
lat: 39.03
lon: -77.5

{
  "status": "success",
  "query": "8.8.8.8",
  "country": "United States",
  "city": "Ashburn"
}

# Extract specific fields
npm run cli -- get-ip-details 8.8.8.8 --jq "{ip: query, country: country}"

# Output:
# ip: 8.8.8.8
# country: United States

# Nested structure
npm run cli -- get-ip-details 8.8.8.8 --jq "{location: {city: city, coords: {lat: lat, lon: lon}}}"

src/
├── cli/                    # Command-line interfaces
│   ├── index.ts            # CLI entry point with Commander setup
│   └── ipaddress.cli.ts    # IP address CLI commands
├── controllers/            # Business logic orchestration  
│   ├── ipaddress.controller.ts    # IP lookup business logic
│   └── ipaddress.formatter.ts     # Response formatting
├── services/               # External API interactions
│   ├── vendor.ip-api.com.service.ts  # ip-api.com service
│   └── vendor.ip-api.com.types.ts    # Service type definitions
├── tools/                  # MCP tool definitions (AI interface)
│   ├── ipaddress.tool.ts   # IP lookup tool (inline content)
│   ├── ipaddress-link.tool.ts  # IP lookup with ResourceLink pattern
│   └── ipaddress.types.ts  # Tool argument schemas
├── resources/              # MCP resource definitions
│   └── ipaddress.resource.ts # IP lookup resource (URI: ip://address)
├── prompts/                # MCP prompt definitions
│   └── analysis.prompt.ts  # IP analysis prompt templates
├── types/                  # Global type definitions
│   └── common.types.ts     # Shared interfaces (ControllerResponse, etc.)
├── utils/                  # Shared utilities
│   ├── logger.util.ts      # Contextual logging system
│   ├── error.util.ts       # MCP-specific error formatting
│   ├── error-handler.util.ts # Error handling utilities
│   ├── config.util.ts      # Environment configuration
│   ├── constants.util.ts   # Version and package constants
│   ├── formatter.util.ts   # Markdown formatting and response truncation
│   ├── toon.util.ts        # TOON format encoding
│   ├── jq.util.ts          # JMESPath filtering
│   ├── response.util.ts    # Raw API response logging
│   └── transport.util.ts   # HTTP transport utilities
└── index.ts                # Server entry point (dual transport)

# Build and Clean
npm run build               # Build TypeScript to dist/
npm run clean               # Remove dist/ and coverage/
npm run prepare             # Build + ensure executable permissions (for npm publish)

# CLI Testing
npm run cli -- get-ip-details 8.8.8.8                    # Test specific IP
npm run cli -- get-ip-details --include-extended-data    # Test with extended data
npm run cli -- get-ip-details --no-use-https             # Test with HTTP

# MCP Server Modes
npm run mcp:stdio           # STDIO transport for AI assistants
npm run mcp:http            # HTTP transport on port 3000
npm run mcp:inspect         # HTTP + auto-open MCP Inspector

# Testing
npm test                    # Run all tests (Jest)
npm run test:coverage       # Generate coverage report
npm run test:cli            # Run CLI-specific tests

# Code Quality
npm run lint                # ESLint with TypeScript rules
npm run format              # Prettier formatting

# Core configuration
TRANSPORT_MODE=http
PORT=3000
DEBUG=true
NODE_ENV=development

# External API Keys
IPAPI_API_TOKEN=your_token_here

{
  "boilerplate": {
    "environments": {
      "DEBUG": "true",
      "TRANSPORT_MODE": "http",
      "PORT": "3000"
    }
  }
}

// src/services/vendor.example-api.service.ts
import { Logger } from '../utils/logger.util.js';
import { fetchApi } from '../utils/transport.util.js';
import { ExampleApiResponse, ExampleApiRequestOptions } from './vendor.example-api.types.js';
import { createApiError, McpError } from '../utils/error.util.js';

const serviceLogger = Logger.forContext('services/vendor.example-api.service.ts');

async function get(
	param?: string,
	options: ExampleApiRequestOptions = {}
): Promise<ExampleApiResponse> {
	const methodLogger = serviceLogger.forMethod('get');
	methodLogger.debug(`Calling Example API with param: ${param}`);

	try {
		const url = `https://api.example.com/${param || 'default'}`;
		const rawData = await fetchApi<ExampleApiResponse>(url, {
			headers: options.apiKey ? { 'Authorization': `Bearer ${options.apiKey}` } : {}
		});

		methodLogger.debug('Received successful response from Example API');
		return rawData;
	} catch (error) {
		methodLogger.error('Service error fetching data', error);
		
		if (error instanceof McpError) {
			throw error;
		}
		
		throw createApiError(
			'Unexpected service error while fetching data',
			undefined,
			error
		);
	}
}

export default { get };

// src/controllers/example.controller.ts
import { Logger } from '../utils/logger.util.js';
import exampleService from '../services/vendor.example-api.service.js';
import { formatExample } from './example.formatter.js';
import { handleControllerError, buildErrorContext } from '../utils/error-handler.util.js';
import { ControllerResponse } from '../types/common.types.js';
import { config } from '../utils/config.util.js';

const logger = Logger.forContext('controllers/example.controller.ts');

export interface GetDataOptions {
	param?: string;
	includeMetadata?: boolean;
}

async function getData(
	options: GetDataOptions = {}
): Promise<ControllerResponse> {
	const methodLogger = logger.forMethod('getData');
	methodLogger.debug(`Getting data for param: ${options.param || 'default'}`, options);

	try {
		// Apply business logic and defaults
		const apiKey = config.get('EXAMPLE_API_TOKEN');
		
		// Call service layer
		const data = await exampleService.get(options.param, {
			apiKey,
			includeMetadata: options.includeMetadata ?? false
		});
		
		// Format response
		const formattedContent = formatExample(data);
		return { content: formattedContent };
		
	} catch (error) {
		throw handleControllerError(
			error,
			buildErrorContext(
				'ExampleData',
				'getData',
				'controllers/example.controller.ts@getData',
				options.param || 'default',
				{ options }
			)
		);
	}
}

export default { getData };

// src/tools/example.tool.ts
import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
import { z } from 'zod';
import { Logger } from '../utils/logger.util.js';
import { formatErrorForMcpTool } from '../utils/error.util.js';
import exampleController from '../controllers/example.controller.js';

const logger = Logger.forContext('tools/example.tool.ts');

// Define Zod schema for tool arguments
const GetDataSchema = z.object({
	param: z.string().optional().describe('Optional parameter for the API call'),
	includeMetadata: z.boolean().optional().default(false)
		.describe('Whether to include additional metadata in the response')
});

async function handleGetData(args: Record<string, unknown>) {
	const methodLogger = logger.forMethod('handleGetData');
	
	try {
		methodLogger.debug('Tool example_get_data called', args);

		// Validate arguments with Zod
		const validatedArgs = GetDataSchema.parse(args);

		// Call controller
		const result = await exampleController.getData({
			param: validatedArgs.param,
			includeMetadata: validatedArgs.includeMetadata
		});

		// Return MCP-formatted response
		return {
			content: [
				{
					type: 'text' as const,
					text: result.content
				}
			]
		};
	} catch (error) {
		methodLogger.error('Tool example_get_data failed', error);
		return formatErrorForMcpTool(error);
	}
}

// Registration function using the modern registerTool API (SDK v1.23.0)
function registerTools(server: McpServer) {
	const registerLogger = logger.forMethod('registerTools');
	registerLogger.debug('Registering example tools...');

	// SDK best practices: 'title' for UI display name, 'description' for detailed info
	server.registerTool(
		'example_get_data',
		{
			title: 'Get Example Data',  // Display name for UI (e.g., 'Get Example Data')
			description: `Gets data from the Example API with optional parameter.
Use this tool to fetch example data. Returns formatted data as Markdown.`,
			inputSchema: GetDataSchema,
		},
		handleGetData
	);

	registerLogger.debug('Example tools registered successfully');
}

export default { registerTools };

// src/cli/example.cli.ts
import { Command } from 'commander';
import { Logger } from '../utils/logger.util.js';
import exampleController from '../controllers/example.controller.js';
import { handleCliError } from '../utils/error.util.js';

const logger = Logger.forContext('cli/example.cli.ts');

function register(program: Command) {
	const methodLogger = logger.forMethod('register');
	methodLogger.debug('Registering example CLI commands...');

	program
		.command('get-data')
		.description('Gets data from the Example API')
		.argument('[param]', 'Optional parameter for the API call')
		.option('-m, --include-metadata', 'Include additional metadata in response')
		.action(async (param, options) => {
			const actionLogger = logger.forMethod('action:get-data');
			
			try {
				actionLogger.debug('CLI get-data called', { param, options });

				const result = await exampleController.getData({
					param,
					includeMetadata: options.includeMetadata || false
				});

				console.log(result.content);
			} catch (error) {
				handleCliError(error);
			}
		});

	methodLogger.debug('Example CLI commands registered successfully');
}

export default { register };

// 1. Register CLI in src/cli/index.ts
import exampleCli from './example.cli.js';

export async function runCli(args: string[]) {
	// ... existing setup code ...
	
	// Register CLI commands
	exampleCli.register(program);  // Add this line
	
	// ... rest of function
}

// 2. Register Tools in src/index.ts
import exampleTools from './tools/example.tool.js';

// In the startServer function, after existing registrations:
exampleTools.registerTools(serverInstance);

// src/resources/example.resource.ts
import { McpServer, ResourceTemplate } from '@modelcontextprotocol/sdk/server/mcp.js';
import { Logger } from '../utils/logger.util.js';
import exampleController from '../controllers/example.controller.js';
import { formatErrorForMcpResource } from '../utils/error.util.js';

const logger = Logger.forContext('resources/example.resource.ts');

function registerResources(server: McpServer) {
	const registerLogger = logger.forMethod('registerResources');
	registerLogger.debug('Registering example resources...');

	// Use registerResource with ResourceTemplate for parameterized URIs (SDK v1.23.0)
	server.registerResource(
		'example-data',
		new ResourceTemplate('example://{param}', { list: undefined }),
		{
			title: 'Example Data',  // Display name for UI
			description: 'Retrieve example data by parameter'
		},
		async (uri, variables) => {
			const methodLogger = logger.forMethod('exampleResource');
			try {
				// Extract parameter from template variables
				const param = variables.param as string | undefined;

				methodLogger.debug('Example resource called', { uri: uri.href, param });

				const result = await exampleController.getData({ param });

				return {
					contents: [
						{
							uri: uri.href,
							text: result.content,
							mimeType: 'text/markdown'
						}
					]
				};
			} catch (error) {
				methodLogger.error('Resource error', error);
				return formatErrorForMcpResource(error, uri.href);
			}
		}
	);

	registerLogger.debug('Example resources registered successfully');
}

export default { registerResources };

npm run cli -- get-ip-details                                            # Get current public IP (TOON format)
npm run cli -- get-ip-details 8.8.8.8                                    # Get details for specific IP
npm run cli -- get-ip-details 1.1.1.1 -e                                 # Short form with extended data
npm run cli -- get-ip-details 1.1.1.1 --include-extended-data           # Long form with extended data
npm run cli -- get-ip-details 8.8.8.8 --no-use-https                    # Force HTTP (for free tier)
npm run cli -- get-ip-details 8.8.8.8 -o json                            # JSON output (short form)
npm run cli -- get-ip-details 8.8.8.8 --output-format json              # JSON output (long form)
npm run cli -- get-ip-details 8.8.8.8 --jq "{ip: query, country: country}"  # JMESPath filtered output

# Optional - for extended data features
IPAPI_API_TOKEN=your_token_from_ip-api.com

# Development
DEBUG=true                    # Enable detailed logging
TRANSPORT_MODE=http          # Use HTTP transport
PORT=3001                    # Custom port

tests/               # Not present - tests are in src/
src/
├── **/*.test.ts     # Co-located with source files
├── utils/           # Utility function tests
├── controllers/     # Business logic tests  
├── services/        # API integration tests
└── cli/             # CLI command tests

npm test                    # Run all tests
npm run test:coverage       # Generate coverage report  
npm run test:cli           # CLI-specific tests only