AddCal vs Modelcontextprotocol MCP

In-depth architectural comparison of the AddCal and Modelcontextprotocol MCP 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?

A

Choose AddCal 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 AddCal Details

Choose Modelcontextprotocol MCP 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 Modelcontextprotocol MCP Details

Feature & Specification Comparison

Specification	A AddCal Developer Tools	Modelcontextprotocol MCP Developer Tools
Summary	Publish public calendars and events others subscribe to: RSVPs, feeds and add-to-calendar links.	Publish and discover MCP servers via the official MCP Registry. Powered by HAPI MCP server.
Category & Scope	Developer Tools	Developer Tools

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": {
    "addcal": {
      "url": "https://addcal.co/documentation/mcp-server"
    }
  }
}

{
  "mcpServers": {
    "mcp-registry-server": {
      "url": "https://registry.modelcontextprotocol.io/docs"
    }
  }
}

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