Backscroll vs When

In-depth architectural comparison of the Backscroll and When 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 Backscroll when:

• You need dedicated capabilities in the Command Line domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• You have access to required keys: BACKSCROLL_VERSION, BACKSCROLL_INSTALL_DIR.
• Primary tools included: Records full command output, exit code, cwd, and timing, Stores data locally in compressed SQLite database with FTS5 search, Supports substring search over commands and outputs.

Explore Backscroll Details

Choose When when:

• You need dedicated capabilities in the Command Line domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: Single MCP server exposing eight endpoints for six tools, Auto-detect stack and regenerate context files, Port conflict scanning.

Feature & Specification Comparison

Specification	Backscroll soren-achebe Command Line	When WhenLabs-org Command Line
Summary	Answers "what did that command print?" from your real terminal history: a per-command PTY session recorder (OSC 133) stores every command's full output, exit code, cwd, and duration in local SQLite/FTS5, and the MCP server searches, retrieves, and diffs those outputs — secret redaction on by default before anything reaches the model.	Developer toolkit: auto-detect stack for AI context files, catch port conflicts, validate .env schemas, spot docs drift, audit dependency licenses, and time coding tasks — 7 MCP tools, one install.
Category & Scope

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": {
    "soren-achebe-backscroll": {
      "command": "npx",
      "args": [
        "-y",
        "soren-achebe-backscroll"
      ],
      "env": {
        "BACKSCROLL_VERSION": "YOUR_BACKSCROLL_VERSION_HERE",
        "BACKSCROLL_INSTALL_DIR": "YOUR_BACKSCROLL_INSTALL_DIR_HERE"
      }
    }
  }
}

{
  "mcpServers": {
    "whenlabs-org-when": {
      "command": "npx",
      "args": [
        "-y",
        "@whenlabs/when"
      ]
    }
  }
}

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