RAGBrain MCP
Connects Claude Desktop to a RAGBrain knowledge base to enable semantic search, document retrieval, and namespace management. It allows users to browse collections, discover documents by topic, and access full text content through natural language.
README
Deprecated
This project has moved to stache-ai - it is no longer maintained here.
RAGBrain MCP
MCP server that connects Claude Desktop to your RAGBrain knowledge base.
Install
pip install ragbrain-mcp
Configure Claude Desktop
Add to your config file:
| OS | Path |
|---|---|
| macOS | ~/Library/Application Support/Claude/claude_desktop_config.json |
| Windows | %APPDATA%\Claude\claude_desktop_config.json |
| Linux | ~/.config/Claude/claude_desktop_config.json |
{
"mcpServers": {
"ragbrain": {
"command": "ragbrain-mcp",
"env": {
"RAGBRAIN_URL": "http://localhost:8000"
}
}
}
}
Restart Claude Desktop. Done.
Tools
| Tool | Description |
|---|---|
ragbrain_list_namespaces |
List namespaces with doc counts |
ragbrain_search |
Semantic search |
ragbrain_browse_namespace |
List docs in a namespace |
ragbrain_get_document |
Get full document by ID |
ragbrain_discover_documents |
Find docs by topic via summary search |
Example prompts
- "What namespaces do I have?"
- "Search for machine learning"
- "Show docs in work/projects"
- "Get document abc-123"
Config
Environment variables:
| Variable | Default | Description |
|---|---|---|
RAGBRAIN_URL |
http://localhost:8000 |
RAGBrain API URL |
RAGBRAIN_TIMEOUT |
60 |
Request timeout (seconds) |
RAGBRAIN_LOG_LEVEL |
INFO |
DEBUG, INFO, WARNING, ERROR |
RAGBRAIN_MAX_RESULTS |
20 |
Max search results |
RAGBRAIN_MAX_DOCUMENT_LENGTH |
100000 |
Max doc length (chars) |
Development
git clone https://github.com/ragbrain/ragbrain-mcp.git
cd ragbrain-mcp
uv venv && source .venv/bin/activate
uv pip install -e ".[dev]"
pytest
┌─────────────────┐ stdio ┌─────────────────┐ HTTP ┌─────────────────┐
│ Claude Desktop │ ◄────────────► │ RAGBrain MCP │ ◄───────────► │ RAGBrain API │
└─────────────────┘ └─────────────────┘ └─────────────────┘
Troubleshooting
Can't connect? Check RAGBrain is running: curl http://localhost:8000/health
Tools not showing? Verify config path, test with ragbrain-mcp, restart Claude Desktop.
Timeouts? Set RAGBRAIN_TIMEOUT higher.
License
MIT
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