Justcall MCP Server vs Qr Agent Core

In-depth architectural comparison of the Justcall MCP Server and Qr Agent Core 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 Justcall MCP Server when:

• You need dedicated capabilities in the Communication domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: list_calls, get_call, update_call.

Explore Justcall MCP Server Details

Choose Qr Agent Core when:

• You need dedicated capabilities in the Communication domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: API Key required (Freemium).
• Primary tools included: create_qr_code, get_qr_code, update_qr_destination.

Explore Qr Agent Core Details

Feature & Specification Comparison

Specification	Justcall MCP Server Communication	Qr Agent Core benswel Communication
Summary	JustCall's Official MCP Server	Dynamic QR code service for AI agents. Create, update, track, and retarget QR codes without regenerating images. 37 tools covering 11 QR types, one-command install via npx qr-for-agent.
Category & Scope	Communication

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": {
    "justcall-mcp-server": {
      "url": "https://mcp.justcall.host/mcp"
    }
  }
}

{
  "mcpServers": {
    "benswel-qr-agent-core": {
      "command": "npx",
      "args": [
        "-y",
        "qr-for-agent"
      ]
    }
  }
}

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