What is the key difference between Once and Skilder?

Once belongs to the Developer Tools category with local stdio execution, while Skilder belongs to the Developer Tools category with local stdio execution.

How do I install Once or Skilder 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 Once and Skilder free or paid?

Once operates under a Free / Open Source model (No auth required). Skilder operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Once lists 0 tools with 2 views and 0 GitHub stars. Skilder lists 0 tools with 1 views and 0 GitHub stars.

Can I use both Once and Skilder 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

Once vs Skilder

In-depth architectural comparison of the Once and Skilder 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

Once

Developer Tools · Local stdio

Quality: 41/100 (Fair) | Auth: No auth required

Skilder

Developer Tools · Local stdio

Quality: 37/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Once if you need specialized Developer Tools tools running via a local process. Choose Skilder if your workspace requires Developer Tools integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Once when:

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

Explore Once Details

Choose Skilder when:

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

Explore Skilder Details

Feature & Specification Comparison

Specification	Once Developer Tools	S Skilder Developer Tools
Summary	Run a side effect exactly once under retries, redelivery, and concurrent workers.	Run skills and MCP tools like production software: versioned, composed into roles, governed.
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

Once Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

Skilder Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

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).

Once Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "once": {
      "command": "uvx",
      "args": [
        "once-kernel"
      ]
    }
  }
}

Skilder Configuration

mcpServers (Claude Desktop / Cursor)

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

Frequently Asked Questions

Once is categorized under Developer Tools and uses a local stdio subprocess. In contrast, Skilder belongs to Developer Tools using local stdio subprocess. Select Once when you need capabilities focused on developer tools and Skilder when you require tools for developer tools.

More alternatives to Once More alternatives to Skilder Developer Tools category hub