What is the key difference between Darwin RAG and Caelune?

Darwin RAG belongs to the end to end RAG platforms category with local stdio execution, while Caelune belongs to the end to end RAG platforms category with local stdio execution.

How do I install Darwin RAG or Caelune in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Darwin RAG and Caelune free or paid?

Darwin RAG operates under a Free / Open Source model (No auth required). Caelune operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Darwin RAG lists 9 tools with 1 views and 1 GitHub stars. Caelune lists 6 tools with 3 views and 45 GitHub stars.

Can I use both Darwin RAG and Caelune together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Darwin RAG vs Caelune

In-depth architectural comparison of the Darwin RAG and Caelune 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.

At a Glance & Executive Verdict

Darwin RAG

end to end RAG platforms · Local stdio

Quality: 49/100 (Fair) | Auth: No auth required

Caelune

end to end RAG platforms · Local stdio

Quality: 39/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Darwin RAG if you need specialized end to end RAG platforms tools running via a local process. Choose Caelune if your workspace requires end to end RAG platforms integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Darwin RAG when:

You need dedicated capabilities in the end to end RAG platforms domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: search_darwin, get_search_results, get_search_result_by_id.

Explore Darwin RAG Details

Choose Caelune when:

You need dedicated capabilities in the end to end RAG platforms domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: Read-only MCP access, Local Markdown and PDF search, Tika-backed document indexing.

Explore Caelune Details

Feature & Specification Comparison

Specification	Darwin RAG end to end RAG platforms	Caelune end to end RAG platforms
Summary	Local-first RAG engine with MCP server for AI agent integration.	Read-only local-first MCP server for private Markdown, PDF, and Tika-backed search on Windows.
Category & Scope	end to end RAG platforms	end to end RAG platforms
Quality signal

Tools & Capabilities Breakdown

Darwin RAG Tools (9)

search_darwin

Query the knowledge base with hybrid/semantic/keyword search

get_search_results

List saved search results

get_search_result_by_id

Load a saved search result by filename

run_pipeline

Ingest + index documents from a path or URL

purge_artifacts

Delete pipeline artifacts for specific files

create_store

Create a new isolated data store

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).

Darwin RAG Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "darwin-rag": {
      "command": "uvx",
      "args": [
        "darwin-rag"
      ]
    }
  }
}

Caelune Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "caelune": {
      "command": "npx",
      "args": [
        "-y",
        "caelune"
      ]
    }
  }
}

Frequently Asked Questions

Darwin RAG is categorized under end to end RAG platforms and uses a local stdio subprocess. In contrast, Caelune belongs to end to end RAG platforms using local stdio subprocess. Select Darwin RAG when you need capabilities focused on end to end rag platforms and Caelune when you require tools for end to end rag platforms.