What is the key difference between Arctura Reef — counterfactual evidence engine (synthetic) and LeClap?

Arctura Reef — counterfactual evidence engine (synthetic) belongs to the Developer Tools category with local stdio execution, while LeClap belongs to the Developer Tools category with local stdio execution.

How do I install Arctura Reef — counterfactual evidence engine (synthetic) or LeClap 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 Arctura Reef — counterfactual evidence engine (synthetic) and LeClap free or paid?

Arctura Reef — counterfactual evidence engine (synthetic) operates under a Free / Open Source model (No auth required). LeClap operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Arctura Reef — counterfactual evidence engine (synthetic) lists 0 tools with 1 views and 0 GitHub stars. LeClap lists 0 tools with 2 views and 24 GitHub stars.

Can I use both Arctura Reef — counterfactual evidence engine (synthetic) and LeClap 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.

Arctura Reef — counte… vs LeClap

Arctura Reef — counte… vs LeClap | AllMCPs

Feature & Specification Comparison

Specification	A Arctura Reef — counterfactual evidence engine (synthetic) Developer Tools	LeClap Developer Tools
Summary	Deterministic same-seed but-for twin for battery fleets — synthetic-only (DR-236)	Compose and render video from one JSON template. Deterministic, runs locally, no generative model.
Category & Scope	Developer Tools	Developer Tools
Quality signal	37/100 (Fair)	44/100 (Fair)
Transport Protocol	Local Subprocess (stdio)	Local Subprocess (stdio)
Auth Requirement	No auth required	No auth required
Pricing Model	Free / Open Source	Free / Open Source
Required Env Vars	None required	None required
Compatible Clients	Claude DesktopCursorWindsurfClineVS Code	Claude DesktopCursorWindsurfClineVS Code
Install path signal	`npx · low`	`npx · high`
Engagement & Health	1 views 0 copies 0 upvotes	2 views 0 copies 0 upvotes 24 stars
Verified / Official	Community Listing	Community Listing
Open full listing	View Arctura Reef — counterfactual evidence engine (synthetic) Listing	View LeClap Listing

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).

Arctura Reef — counterfactual evidence engine (synthetic) Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "arctura-reef-counterfactual-evidence-engine-synthetic": {
      "command": "npx",
      "args": [
        "-y",
        "arctura-reef-counterfactual-evidence-engine-synthetic"
      ]
    }
  }
}

LeClap Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "leclap": {
      "command": "npx",
      "args": [
        "-y",
        "@leclap/cli"
      ]
    }
  }
}

Arctura Reef — counterfactual evidence engine (synthetic) vs LeClap

At a Glance & Executive Verdict

Which MCP Server Should You Choose?

Choose Arctura Reef — counterfactual evidence engine (synthetic) when:

Choose LeClap when:

Feature & Specification Comparison

Tools & Capabilities Breakdown

Arctura Reef — counterfactual evidence engine (synthetic) Tools (0)

LeClap Tools (0)

Ready-to-Paste Client Configurations

Frequently Asked Questions

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