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laurus-mcp

Model Context Protocol (MCP) server for the Laurus search engine. Enables AI assistants such as Claude to index documents and perform searches through the standard MCP stdio transport.

Features

MCP stdio transport -- Runs as a subprocess; communicates with the AI client via stdin/stdout
gRPC client -- Proxies all tool calls to a running laurus-server instance
All search modes -- Lexical (BM25), vector (HNSW/Flat/IVF), and hybrid search
Dynamic connection -- Connect to any laurus-server endpoint via the connect tool
Document lifecycle -- Put, add, get, delete, and search documents through MCP tools

Architecture

AI Client (Claude, etc.)
  └─ stdio (JSON-RPC) ─→ laurus-mcp
                            └─ gRPC ─→ laurus-server
                                         └─ Index on Disk

Quick Start

# Start laurus-server
laurus serve --port 50051

# Configure Claude Code
claude mcp add laurus -- laurus mcp --endpoint http://localhost:50051

Claude Desktop

Add the following to your Claude Desktop configuration file (claude_desktop_config.json):

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "laurus": {
      "command": "laurus",
      "args": ["mcp", "--endpoint", "http://localhost:50051"]
    }
  }
}

MCP Tools

Tool	Description
`connect`	Connect to a laurus-server gRPC endpoint
`create_index`	Create a new index with a schema
`get_stats`	Get index statistics (document count, vector fields)
`get_schema`	Get the current index schema
`add_field`	Dynamically add a field to the index
`delete_field`	Remove a field from the schema
`put_document`	Put (upsert) a document
`add_document`	Add a document as a new chunk (append)
`get_documents`	Retrieve all documents by ID
`delete_documents`	Delete all documents by ID
`commit`	Commit pending changes to disk
`search`	Search documents using the Laurus unified query DSL (lexical, vector, hybrid)

Documentation

License

This project is licensed under the MIT License - see the LICENSE file for details.

laurus-mcp 0.3.1