165 lines
4.3 KiB
Markdown
165 lines
4.3 KiB
Markdown
# MCP Server
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> Connect Claude Code and other AI assistants to your knowledge base.
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**How it works:** RA-OS includes an MCP (Model Context Protocol) server. This lets any MCP-compatible assistant — like Claude Code — search your knowledge graph, add new knowledge, and manage your graph. Everything stays local.
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---
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## Quick Start (Recommended)
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The easiest way is using the npm package:
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```json
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{
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"mcpServers": {
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"ra-h": {
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"command": "npx",
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"args": ["ra-h-mcp-server"]
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}
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}
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}
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```
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Add this to your `~/.claude.json` (Claude Code) or Claude Desktop settings.
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**Requirements:**
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- Node.js 18+ installed
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**That's it.** The database is created automatically on first connection. No need to keep RA-OS running.
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---
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## Alternative: Local Development
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If you're developing RA-OS and want to use the local server:
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### Standalone (No Web App Required)
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```json
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{
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"mcpServers": {
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"ra-h": {
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"command": "node",
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"args": ["/path/to/ra-h_os/apps/mcp-server-standalone/index.js"]
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}
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}
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}
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```
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First install dependencies:
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```bash
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cd apps/mcp-server-standalone
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npm install
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```
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### HTTP Transport (Web App Required)
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If you want real-time UI updates when nodes are created:
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1. Start RA-OS: `npm run dev`
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2. Configure:
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```json
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{
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"mcpServers": {
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"ra-h": {
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"url": "http://127.0.0.1:44145/mcp"
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}
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}
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}
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```
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---
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## Available Tools
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| Tool | Description |
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|------|-------------|
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| `getContext` | Get graph overview — stats, contexts, hub nodes, dimensions, recent activity. Called first automatically. |
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| `queryContexts` | List contexts, inspect a context, or search contexts by name/description. |
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| `createNode` | Create a new node (title/source/dimensions) |
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| `queryNodes` | Search existing nodes by keyword |
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| `updateNode` | Update an existing node |
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| `getNodesById` | Get nodes by ID |
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| `createEdge` | Create relationship between nodes |
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| `updateEdge` | Update an edge explanation |
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| `queryEdge` | Query existing edges |
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| `queryDimensions` | List all dimensions |
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| `createDimension` | Create a new dimension |
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| `updateDimension` | Update/rename dimension |
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| `deleteDimension` | Delete a dimension |
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| `listSkills` | List available skills |
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| `readSkill` | Read a skill by name |
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| `writeSkill` | Create or update a custom skill |
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| `deleteSkill` | Delete a custom skill |
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| `searchContentEmbeddings` | Search extracted source content |
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| `sqliteQuery` | Run read-only SQL queries |
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---
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## What to Expect
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Once connected, the MCP server instructs Claude to:
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1. **Call `getContext` first** to orient itself (contexts, hub nodes, dimensions, stats, available skills)
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2. **Proactively capture knowledge** — when a new insight, decision, person, or reference surfaces, it proposes a specific node (title, dimensions, description) so you can approve with minimal friction
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3. **Read skills for complex tasks** — skills provide reusable procedural instructions for graph operations and workflows
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4. **Search before creating** to avoid duplicates
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You don't need to ask Claude to use your knowledge base — it will offer when it spots something worth saving.
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---
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## Example Usage
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Once connected, you can ask your AI assistant:
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```
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"What's in my knowledge graph?"
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"Search RA-H for what I wrote about product strategy"
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"Add this conversation summary to RA-H as a new node"
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"Find all nodes with the 'research' dimension"
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"Create an edge between node 123 and node 456"
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```
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---
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## Key Files
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| File | Purpose |
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|------|---------|
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| `apps/mcp-server-standalone/` | **Standalone server (direct SQLite, recommended)** |
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| `apps/mcp-server/server.js` | HTTP MCP server |
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| `apps/mcp-server/stdio-server.js` | STDIO bridge to HTTP server |
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---
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## Security
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- The MCP server only binds to `127.0.0.1` — localhost only
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- No authentication required (local access only)
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- All data persisted to `~/Library/Application Support/RA-H/db/rah.sqlite`
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---
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## Troubleshooting
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### "Database not found"
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The MCP server auto-creates the database on first connection (v1.1.0+). If you're on an older version, run RA-OS once to create it:
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```bash
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npm run dev
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```
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### "Tools not showing" (npm package)
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1. Make sure Node.js 18+ is installed: `node --version`
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2. Try running manually: `npx ra-h-mcp-server`
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3. Restart Claude Code
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### "Connection refused" (HTTP method)
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1. Make sure RA-OS is running: `npm run dev`
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2. Check the port: `lsof -i :44145`
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