# MCP Server Setup
LeanKG exposes a Model Context Protocol (MCP) server that AI tools can connect to.
## Automated Setup (Recommended)
Use the install script to install and configure MCP for your AI tool:
```bash
See [Installation](../README.md#installation) for supported targets.
## Manual Setup
### OpenCode AI
Add to `~/.config/opencode/opencode.json`:
```json
{
"mcp": {
"leankg_dev": {
"type": "local",
"command": ["leankg", "mcp-stdio", "--watch"],
"enabled": true
}
}
}
```
### Cursor AI
Add to `~/.cursor/mcp.json`:
```json
{
"mcpServers": {
"leankg": {
"command": "leankg",
"args": ["mcp-stdio", "--watch"]
}
}
}
```
### Claude Code / Claude Desktop
Add to `~/.config/claude/settings.json`:
```json
{
"mcpServers": {
"leankg": {
"command": "leankg",
"args": ["mcp-stdio", "--watch"]
}
}
}
```
### Gemini CLI
Add to `~/.config/gemini-cli/mcp.json`:
```json
{
"mcpServers": {
"leankg": {
"command": "leankg",
"args": ["mcp-stdio", "--watch"]
}
}
}
```
### Google Antigravity
Add to `~/.gemini/antigravity/mcp_config.json`:
```json
{
"mcpServers": [
{
"name": "leankg",
"transport": "stdio",
"command": "leankg",
"args": ["mcp-stdio", "--watch"],
"enabled": true
}
]
}
```
### Kilo Code
Add to `~/.config/kilo/kilo.json`:
```json
{
"$schema": "https://kilo.ai/config.json",
"mcp": {
"leankg": {
"type": "local",
"command": ["leankg", "mcp-stdio", "--watch"],
"enabled": true
}
}
}
```
## Starting the MCP Server
```bash
# Stdio mode with auto-indexing (for local AI tools)
leankg mcp-stdio --watch
# Stdio mode without auto-indexing
leankg mcp-stdio
```
## Auto-Initialization
When the MCP server starts without an existing LeanKG project, it automatically initializes and indexes the current directory. This provides a "plug and play" experience for AI tools.
## Auto-Indexing
When the MCP server starts with an existing LeanKG project, it checks if the index is stale (by comparing git HEAD commit time vs database file modification time). If stale, it automatically runs incremental indexing to ensure AI tools have up-to-date context.
## Fallback
If the MCP server reports "LeanKG not initialized", manually run `leankg init` in your project directory, then restart the AI tool.