SP-MCP - System Process Model Context Protocol Server

A Model Context Protocol (MCP) server for system processes that provides development tools like test running, package management, file operations, and development server management. Built for Nodejs or other javascript/typescript runtimes.

Setup

The server communicates via JSON-RPC over stdin/stdout following the MCP protocol. It's designed to be used with MCP clients like Claude Desktop or VS Code.

VS Code MCP Configuration

Add this server to your VS Code MCP configuration file (~/.vscode/mcp_servers.json or similar):

{
  "mcpServers": {
    "sp-mcp": {
      "command": "bunx",
      "args": ["sp-mcp"],
      "env": {
        "MCP_PACKAGE_MANAGER": "bun",
        "MCP_TESTS_ENABLED": "true",
        "MCP_E2E_TESTS_ENABLED": "true",
        "MCP_DEV_COMMAND": "dev"
      }
    }
  }
}

Claude Desktop Configuration

Add to your Claude Desktop configuration file (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "sp-mcp": {
      "command": "bunx",
      "args": ["sp-mcp", "--package-manager", "bun", "--tests-enabled", "true"]
    }
  }
}

Basic Usage

# Run with default configuration
bunx sp-mcp

# Run with custom configuration
bunx sp-mcp --package-manager bun --tests-enabled true

# Using environment variables
MCP_PACKAGE_MANAGER=npm MCP_TESTS_ENABLED=true bunx sp-mcp

Configuration

The server can be configured via environment variables or command line arguments. Command line arguments take priority over environment variables.

Environment Variables

Variable	Description	Type	Default
MCP_PACKAGE_MANAGER	Package manager to use for running commands	yarn|npm|bun	yarn
MCP_E2E_TESTS_ENABLED	Enable end-to-end tests functionality	true|false	false
MCP_E2E_TEST_COMMAND	Command to run e2e tests in package.json	string	test:e2e
MCP_TESTS_ENABLED	Enable unit tests functionality	true|false	false
MCP_TEST_COMMAND	Command to run unit tests in package.json	string	test
MCP_DEV_COMMAND	Command to start development server in package.json	string	dev
MCP_BANNED_SCRIPTS	List of package.json scripts that are not allowed to run	comma-separated list	deploy:prod,dev,add
MCP_TYPEORM_ENABLED	Enable TypeORM migration features	true|false	false
MCP_MIGRATION_GENERATE_COMMAND	Command to generate TypeORM migration files	string	migration:generate
MCP_GRAPHQL_ENABLED	Enable GraphQL tools functionality	true|false	false

Command Line Arguments

All environment variables have corresponding command line arguments that override environment settings:

Argument	Description	Example
--package-manager	Same as MCP_PACKAGE_MANAGER	--package-manager bun
--e2e-tests-enabled	Same as MCP_E2E_TESTS_ENABLED	--e2e-tests-enabled true
--e2e-test-command	Same as MCP_E2E_TEST_COMMAND	--e2e-test-command test:e2e
--tests-enabled	Same as MCP_TESTS_ENABLED	--tests-enabled true
--test-command	Same as MCP_TEST_COMMAND	--test-command test
--dev-command	Same as MCP_DEV_COMMAND	--dev-command dev
--banned-scripts	Same as MCP_BANNED_SCRIPTS	--banned-scripts deploy:prod,build:prod
--typeorm-enabled	Same as MCP_TYPEORM_ENABLED	--typeorm-enabled true
--migration-generate-command	Same as MCP_MIGRATION_GENERATE_COMMAND	--migration-generate-command migration:generate
--graphql-enabled	Same as MCP_GRAPHQL_ENABLED	--graphql-enabled true

Available Tools

The server provides the following MCP tools:

Always Available Tools

Development Tools

• dev-start - Start development server using pm2

  • Uses the configured devCommand (default: dev)
  • Runs the process in background using pm2
  • No additional configuration required

• dev-logs - Get development server logs from pm2

  • Retrieves logs from the pm2 process
  • Supports configurable number of log lines (max 200)
  • No additional configuration required

Package Management Tools

• package-run - Run package manager commands

  • Uses the configured packageManager (yarn/npm/bun)
  • Respects the bannedScripts configuration
  • No additional configuration required

• install - Install packages as dependencies or devDependencies

  • Uses the configured packageManager (yarn/npm/bun)
  • Supports both regular and dev dependencies
  • No additional configuration required

File Management Tools

• delete-project-file - Delete files from the project
  • Deletes specified files from the project directory
  • No additional configuration required

Node.js Tools

• node - Run Node.js commands in the project directory
  • Execute any Node.js command or script
  • No additional configuration required

Conditional Tools

Testing Tools

Requirements: MCP_TESTS_ENABLED=true OR MCP_E2E_TESTS_ENABLED=true

• run - Run unit tests or e2e tests
  • Unit tests: Available when MCP_TESTS_ENABLED=true
  • E2E tests: Available when MCP_E2E_TESTS_ENABLED=true
  • Supports file-specific testing (fileName parameter)
  • Supports test name filtering (testName parameter)
  • Automatic detection of e2e tests by .e2e-spec.ts file extension
  • Uses configured testCommand (default: test) for unit tests
  • Uses configured e2eTestCommand (default: test:e2e) for e2e tests

Database Tools

Requirements: MCP_TYPEORM_ENABLED=true

• migrations-generate - Generate TypeORM migration files
  • Generates new migration files when entities are changed
  • Uses configured migrationGenerateCommand (default: migration:generate)
  • Creates migration files in the migrations directory

GraphQL Tools

Requirements: MCP_GRAPHQL_ENABLED=true

• graphql-call - Execute GraphQL queries and mutations

  • Make requests to any GraphQL endpoint
  • Supports GraphQL queries and mutations
  • Optional JSON variables for parameterized queries
  • Optional custom headers
  • Optional Basic authentication (username/password)
  • Returns the complete GraphQL response

• graphql-schema - Fetch GraphQL schema via introspection

  • Retrieves the full GraphQL schema from any endpoint
  • Uses introspection query to get complete type information
  • Saves schema as JSON to specified file location
  • Optional Basic authentication (username/password)
  • Creates directories if they don't exist

Tool Availability Summary

Tool	Always Available	Requires Configuration
dev-start	✅	None
dev-logs	✅	None
package-run	✅	None
install	✅	None
delete-project-file	✅	None
node	✅	None
run	❌	MCP_TESTS_ENABLED=true or MCP_E2E_TESTS_ENABLED=true
migrations-generate	❌	MCP_TYPEORM_ENABLED=true
graphql-call	❌	MCP_GRAPHQL_ENABLED=true
graphql-schema	❌	MCP_GRAPHQL_ENABLED=true

Examples

Basic Development Setup

# Start with npm package manager and tests enabled
MCP_PACKAGE_MANAGER=npm MCP_TESTS_ENABLED=true bunx sp-mcp

# Or using command line arguments
bunx sp-mcp --package-manager npm --tests-enabled true

Full Featured Setup

# Enable all features with custom commands
bunx sp-mcp \
  --package-manager bun \
  --tests-enabled true \
  --e2e-tests-enabled true \
  --test-command "test:unit" \
  --e2e-test-command "test:e2e" \
  --dev-command "start:dev" \
  --typeorm-enabled true \
  --migration-generate-command "db:migration:generate"

Environment Variable Configuration

# Set up environment variables
export MCP_PACKAGE_MANAGER=bun
export MCP_TESTS_ENABLED=true
export MCP_E2E_TESTS_ENABLED=true
export MCP_DEV_COMMAND=start:dev
export MCP_BANNED_SCRIPTS=deploy:prod,build:prod,release

# Run server
bunx sp-mcp

Mixed Configuration (Args Override Env)

# Environment sets defaults, arguments override specific settings
MCP_PACKAGE_MANAGER=yarn MCP_TESTS_ENABLED=false bunx sp-mcp --package-manager bun --tests-enabled true
# Result: Uses bun as package manager with tests enabled

TypeORM Database Development

# Enable TypeORM features for database development
bunx sp-mcp \
  --package-manager npm \
  --typeorm-enabled true \
  --migration-generate-command "typeorm:migration:generate"

GraphQL Development

# Enable GraphQL tools for API development
bunx sp-mcp \
  --package-manager npm \
  --graphql-enabled true

# Use with environment variable
MCP_GRAPHQL_ENABLED=true bunx sp-mcp

Configuration Testing

Test your configuration with the included test script:

# Test current configuration
node test-config.js

# Test with specific arguments
node test-config.js --package-manager bun --tests-enabled true

# Show configuration help
node test-config.js --help

Security

The bannedScripts configuration prevents certain package.json scripts from being executed through the package-run tool. By default, scripts like deploy:prod, dev, and add are banned to prevent accidental deployment or server startup through the wrong tool.

Requirements

• Bun: 1.0.0 or higher
• PM2: Required for development server management
• TypeScript: ^5 (peer dependency)

License

MIT

Contributing

This project is built with Bun and TypeScript. To contribute:

1. Install Bun
2. Install dependencies: bun install
3. Run tests: bun test (if test scripts are configured)
4. Start development: bun run index.ts

Troubleshooting

Common Issues

1. Server not starting: Check that Bun is properly installed and version is 1.0.0+
2. Tests not running: Ensure testsEnabled or e2eTestsEnabled is set to true
3. Package manager commands failing: Verify the correct package manager is configured
4. PM2 issues: Ensure PM2 is installed globally: npm install -g pm2

Debug Mode

Enable debug logging by setting the appropriate log level in your MCP client configuration.