core
npxVerifiedCore library for building MCP servers. Provides decorators, reflection, and runtime server functionality. Implements TypeScript toolkit for enterprise MCP servers. Integrates with LeanMCP SDK. Used by developers building modular, efficient MCP servers.
1300Updated 2 weeks ago
Overview
Core library for building MCP servers. Provides decorators, reflection, and runtime server functionality. Implements TypeScript toolkit for enterprise MCP servers. Integrates with LeanMCP SDK. Used by developers building modular, efficient MCP servers.
Installation
1Install the package
npx
npx -y @leanmcp/core2Add to Claude
Add this configuration to your claude_desktop_config.json:
claude_desktop_config.json
{
"mcpServers": {
"leanmcp-core-npm": {
"command": "npx",
"args": [
"-y",
"npx -y @leanmcp/core"
]
}
}
}3Verify installation
Restart Claude Desktop, then ask:
"What tools do you have available from core?"
Prerequisites
- Node.js 18 or higher
- npm or npx available
- Claude Desktop or Claude API access
- API key for core
Configuration
API Key Required
This server requires an API key from core. Add it to your environment or config.
| Variable | Required | Description |
|---|---|---|
| CORE_API_KEY | Yes | Your core API key |
Usage Examples
List Resources
"What resources are available in core?"
Claude will query available resources and return a list of what you can access.
Get Details
"Show me details about [specific item] in core"
Claude will fetch and display detailed information about the requested item.
Create New
"Create a new [item] in core with [details]"
Claude will use the appropriate tool to create the resource and confirm success.
Works with core
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