Velocirag MCP server

🦖 VelociRAG

Lightning-fast RAG for AI agents.

Four-layer retrieval fusion powered by ONNX Runtime. No PyTorch. Sub-200ms warm search. Incremental graph updates. MCP-ready.

Most RAG solutions either drag in 2GB+ of PyTorch or limit you to single-layer vector search. VelociRAG gives you four retrieval methods — vector similarity, BM25 keyword matching, knowledge graph traversal, and metadata filtering — fused through reciprocal rank fusion with cross-encoder reranking. All running on ONNX Runtime, no GPU, no API keys. Comes with an MCP server for agent integration, a Unix socket daemon for warm queries, and a CLI that just works.

🚀 Quick Start

MCP Server (Claude, Cursor, Windsurf)

pip install "velocirag[mcp]"
velocirag index ./my-docs
velocirag mcp

Claude Code — add to .mcp.json in your project root:

{
  "mcpServers": {
    "velocirag": {
      "command": "velocirag",
      "args": ["mcp"],
      "env": { "VELOCIRAG_DB": "/path/to/data" }
    }
  }
}

Then open /mcp in Claude Code and enable the velocirag server. If using a virtualenv, use the full path to the binary (e.g. .venv/bin/velocirag).

Claude Desktop — add to claudedesktopconfig.json:

{
  "mcpServers": {
    "velocirag": {
      "command": "velocirag",
      "args": ["mcp", "--db", "/path/to/data"]
    }
  }
}

Cursor — add to .cursor/mcp.json:

{
  "mcpServers": {
    "velocirag": {
      "command": "velocirag",
      "args": ["mcp", "--db", "/path/to/data"]
    }
  }
}

Python API

from velocirag import Embedder, VectorStore, Searcher

embedder = Embedder()
store = VectorStore('./my-db', embedder)
store.add_directory('./my-docs')
searcher = Searcher(store, embedder)
results = searcher.search('query', limit=5)

CLI

pip install velocirag
velocirag index ./my-docs
velocirag search "your query here"

Search Daemon (warm engine for CLI users)

velocirag serve --db ./my-data        # start daemon (background)
velocirag search "query"              # auto-routes through daemon
velocirag status                      # check daemon health
velocirag stop                        # stop daemon

The daemon keeps the ONNX model + FAISS index warm over a Unix socket. First query loads the engine (~1s), subsequent queries return in ~180ms with full 4-layer fusion.

🎯 Why VelociRAG?

• 4-layer search — vector + BM25 keyword + knowledge graph + metadata, fused with RRF
• No LLM needed — search runs entirely on local models (MiniLM + TinyBERT, ~80MB total)
• No GPU needed — pure ONNX inference, runs on any machine
• ~3ms warm search — daemon keeps models + indices warm over Unix socket
• Incremental indexing — add files without rebuilding the whole index
• MCP server — plug into Claude, Cursor, Windsurf, any MCP client

Related Projects

• Memkoshi — Agent memory system. Uses VelociRAG as its search engine.
• Stelline — Session intelligence. Crafts memories from conversation logs.
• Glyph — MCP security scanner and runtime protection.

🏗️ How It Works

The 4-layer pipeline:

Query → expand (acronyms, variants)
      → [Vector]   FAISS cosine similarity (384d, MiniLM-L6-v2 via ONNX)
      → [Keyword]  BM25 via SQLite FTS5
      → [Graph]    Knowledge graph traversal
      → [Metadata] Structured SQL filters (tags, status, project)
      → RRF Fusion → Cross-encoder rerank → Results

What each layer catches:

Shortened. The full README is on GitHub.