What is the key difference between Qr Agent Core and Justcall MCP Server?

Qr Agent Core belongs to the Communication category with local stdio execution, while Justcall MCP Server belongs to the Communication category with cloud HTTP/SSE execution.

How do I install Qr Agent Core or Justcall MCP Server 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 Qr Agent Core and Justcall MCP Server free or paid?

Qr Agent Core operates under a Freemium model (API Key required). Justcall MCP Server operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Qr Agent Core lists 37 tools with 1 views and 3 GitHub stars. Justcall MCP Server lists 67 tools with 0 views and 25 GitHub stars.

Can I use both Qr Agent Core and Justcall MCP Server 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

Qr Agent Core vs Justcall MCP Server

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

Qr Agent Core

Communication · Local stdio

Quality: 59/100 (Good) | Auth: API Key required

Justcall MCP Server

Communication · Remote HTTP/SSE

Quality: 47/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Qr Agent Core if you need specialized Communication tools running via a local process. Choose Justcall MCP Server if your workspace requires Communication integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

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

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

Feature & Specification Comparison

Specification	Qr Agent Core benswel Communication	Justcall MCP Server Communication
Summary	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.	JustCall's Official MCP Server
Category & Scope	Communication

Tools & Capabilities Breakdown

Qr Agent Core Tools (37)

create_qr_code

Create a new managed QR code with optional custom styling. The QR code points to a short URL that redirects to your target URL. You can change the target URL later without regenerating the QR image. Supports custom colors, dot shapes, corner shapes, and logo embedding.

get_qr_code

Retrieve details of an existing QR code by its short ID. Returns the current target URL, metadata, and timestamps.

update_qr_destination

Change where an existing QR code redirects to. This is the key 'dynamic link' feature: the QR image stays the same, but scanning it will now go to the new URL. Ideal for updating campaigns, fixing broken links, or A/B testing.

list_qr_codes

List all managed QR codes with pagination. Returns short IDs, target URLs, labels, and timestamps. Use this to browse or search for existing QR codes.

delete_qr_code

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).

Qr Agent Core Configuration

mcpServers (Claude Desktop / Cursor)

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

Justcall MCP Server Configuration

mcpServers (Claude Desktop / Cursor)

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

Frequently Asked Questions

Qr Agent Core is categorized under Communication and uses a local stdio subprocess. In contrast, Justcall MCP Server belongs to Communication using remote streaming HTTP/SSE transport. Select Qr Agent Core when you need capabilities focused on communication and Justcall MCP Server when you require tools for communication.

More alternatives to Qr Agent Core More alternatives to Justcall MCP Server Communication category hub