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.
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.
npx -y @leanmcp/coreAdd this configuration to your claude_desktop_config.json:
{
"mcpServers": {
"leanmcp-core-npm": {
"command": "npx",
"args": [
"-y",
"npx -y @leanmcp/core"
]
}
}
}Restart Claude Desktop, then ask:
"What tools do you have available from core?"
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 |
"What resources are available in core?"
Claude will query available resources and return a list of what you can access.
"Show me details about [specific item] in core"
Claude will fetch and display detailed information about the requested item.
"Create a new [item] in core with [details]"
Claude will use the appropriate tool to create the resource and confirm success.
We build custom MCP integrations for B2B companies. From simple connections to complex multi-tool setups.