MCP Local Rag vs Longmem

In-depth architectural comparison of the MCP Local Rag and Longmem MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

Choose MCP Local Rag when:

• You need dedicated capabilities in the Knowledge & Memory domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore MCP Local Rag Details

Choose Longmem when:

• You need dedicated capabilities in the Knowledge & Memory domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Longmem Details

Feature & Specification Comparison

Specification	MCP Local Rag Knowledge & Memory	Longmem Knowledge & Memory
Summary	Semantic code & doc search with keyword boost. AST parsing, local embeddings, privacy-first.	Persistent cross-project memory for Cursor and Claude Code using local semantic search.
Category & Scope	Knowledge & Memory	Knowledge & Memory
Quality signal

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "mcp-local-rag": {
      "command": "npx",
      "args": [
        "-y",
        "@damoqiongqiu/mcp-local-rag"
      ]
    }
  }
}

{
  "mcpServers": {
    "longmem": {
      "url": "https://raw.githubusercontent.com/marerem/longmem/main/longmem_github_logo.svg"
    }
  }
}

Related MCP Server Comparisons