What is the key difference between Flashcards Open Source App and OnlyWorlds?

Flashcards Open Source App belongs to the Developer Tools category with local stdio execution, while OnlyWorlds belongs to the Developer Tools category with cloud HTTP/SSE execution.

How do I install Flashcards Open Source App or OnlyWorlds 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 Flashcards Open Source App and OnlyWorlds free or paid?

Flashcards Open Source App operates under a Free / Open Source model (No auth required). OnlyWorlds operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Flashcards Open Source App lists 0 tools with 0 views and 0 GitHub stars. OnlyWorlds lists 0 tools with 0 views and 0 GitHub stars.

Can I use both Flashcards Open Source App and OnlyWorlds 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.

How do I install Flashcards Open Source App or OnlyWorlds in Claude Desktop, Cursor, or Windsurf?

Both servers follow the standard Model Context Protocol configuration format. Simply copy the JSON block from the configuration section above and paste it into your AI client's mcpServers configuration object (for instance in claude_desktop_config.json or ~/.cursor/mcp.json ), then completely restart or refresh the application.

Are Flashcards Open Source App and OnlyWorlds free to use, or do they require API keys?

Flashcards Open Source App is listed under a Free / Open Source model with No auth required . OnlyWorlds operates under a Free / Open Source model with No auth required . If environment variables are required (such as API keys), be sure to define them under the env key in your MCP client's configuration file.

Can I run both Flashcards Open Source App and OnlyWorlds at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both flashcards-open-source-app and onlyworlds as distinct keys inside the single mcpServers object in your configuration file. Your AI assistant will automatically select and call the appropriate tool from either server during chat sessions.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, Flashcards Open Source App has a Quality Score of 27 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars. OnlyWorlds holds a Quality Score of 42 /100 ( Fair ) with 0 views, 0 installs, and 0 GitHub stars.

Side-by-Side Model Context Protocol Comparison

Flashcards Open Source App vs OnlyWorlds

In-depth architectural comparison of the Flashcards Open Source App and OnlyWorlds 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

Flashcards Open Source App

Developer Tools · Local stdio

Quality: 27/100 (Emerging) | Auth: No auth required

OnlyWorlds

Developer Tools · Remote HTTP/SSE

Quality: 42/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Flashcards Open Source App if you need specialized Developer Tools tools running via a local process. Choose OnlyWorlds if your workspace requires Developer Tools integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Flashcards Open Source App 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 Flashcards Open Source App Details

Choose OnlyWorlds when:

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

Explore OnlyWorlds Details

Feature & Specification Comparison

Specification	F Flashcards Open Source App Developer Tools	O OnlyWorlds Developer Tools
Summary	Read and write open-source flashcards and decks through split read/write MCP tools.	Read and write typed fictional worlds (22 linked element types) via the OnlyWorlds open standard.
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

Flashcards Open Source App Tools (0)

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

OnlyWorlds 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).

Flashcards Open Source App Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "flashcards-open-source-app": {
      "command": "npx",
      "args": [
        "-y",
        "flashcards-open-source-app"
      ]
    }
  }
}

OnlyWorlds Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "onlyworlds": {
      "url": "https://www.onlyworlds.com"
    }
  }
}

Frequently Asked Questions

Flashcards Open Source App is categorized under Developer Tools and uses a local stdio subprocess. In contrast, OnlyWorlds belongs to Developer Tools using remote streaming HTTP/SSE transport. Select Flashcards Open Source App when you need capabilities focused on developer tools and OnlyWorlds when you require tools for developer tools.

More alternatives to Flashcards Open Source App More alternatives to OnlyWorlds Developer Tools category hub