What is the key difference between Agent Device and Crystallize MCP?

Agent Device belongs to the Browser Automation category with cloud HTTP/SSE execution, while Crystallize MCP belongs to the Browser Automation category with local stdio execution.

How do I install Agent Device or Crystallize MCP 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 Agent Device and Crystallize MCP free or paid?

Agent Device operates under a Free / Open Source model (No auth required). Crystallize MCP operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Agent Device lists 5 tools with 1 views and 4,050 GitHub stars. Crystallize MCP lists 16 tools with 0 views and 0 GitHub stars.

Can I use both Agent Device and Crystallize MCP 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 Agent Device or Crystallize MCP 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 Agent Device and Crystallize MCP free to use, or do they require API keys?

Agent Device is listed under a Free / Open Source model with No auth required . Crystallize MCP 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 Agent Device and Crystallize MCP at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both callstackincubator-agent-device and crystallize-mcp 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, Agent Device has a Quality Score of 59 /100 ( Good ) with 1 views, 0 installs, and 4,050 GitHub stars. Crystallize MCP holds a Quality Score of 47 /100 ( Fair ) with 0 views, 0 installs, and 0 GitHub stars.

Side-by-Side Model Context Protocol Comparison

Agent Device vs Crystallize MCP

In-depth architectural comparison of the Agent Device and Crystallize 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.

At a Glance & Executive Verdict

Agent Device

Browser Automation · Remote HTTP/SSE

Quality: 59/100 (Good) | Auth: No auth required

Crystallize MCP

Browser Automation · Local stdio

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

Verdict Summary: Choose Agent Device if you need specialized Browser Automation tools running via a hosted cloud SSE transport. Choose Crystallize MCP if your workspace requires Browser Automation integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Agent Device when:

You need dedicated capabilities in the Browser Automation domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: Cross-platform support for iOS, Android, tvOS, macOS, Linux, and web, Accessibility tree snapshots with token-efficient element references, UI actions including press, fill, scroll, wait, and alert handling.

Explore Agent Device Details

Choose Crystallize MCP when:

You need dedicated capabilities in the Browser Automation domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: browse_catalogue, get_item, search_catalogue.

Explore Crystallize MCP Details

Feature & Specification Comparison

Specification	Agent Device callstackincubator Browser Automation	C Crystallize MCP Browser Automation
Summary	Discovery router for the agent-device CLI. Exposes status, install guidance, version-matched help, prompts, and resources for iOS, Android, tvOS, macOS, and Linux automation workflows.	Crystallize headless commerce tools for AI agents via Model Context Protocol
Category & Scope	Browser Automation

Tools & Capabilities Breakdown

Agent Device Tools (5)

Cross-platform support for iOS, Android, tvOS, macOS, Linux, and web

Accessibility tree snapshots with token-efficient element references

UI actions including press, fill, scroll, wait, and alert handling

Evidence capture: screenshots, video, logs, traces, and network data

Replayable workflows with script export and integration with agent terminals

Crystallize MCP Tools (16)

browse_catalogue

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).

Agent Device Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "callstackincubator-agent-device": {
      "url": "https://www.callstack.com/open-source?utm_campaign=generic&utm_source=github&utm_medium=referral&utm_content=agent-device"
    }
  }
}

Crystallize MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "crystallize-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@hayodev/crystallize-mcp"
      ]
    }
  }
}

Frequently Asked Questions

Agent Device is categorized under Browser Automation and uses a remote streaming HTTP/SSE transport. In contrast, Crystallize MCP belongs to Browser Automation using local stdio subprocess. Select Agent Device when you need capabilities focused on browser automation and Crystallize MCP when you require tools for browser automation.

More alternatives to Agent Device More alternatives to Crystallize MCP Browser Automation category hub