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

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

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

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

Which MCP server has more tools and community activity?

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

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

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

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

Side-by-Side Model Context Protocol Comparison

Crystallize MCP vs Agent Device

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

Crystallize MCP

Browser Automation · Local stdio

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

Agent Device

Browser Automation · Remote HTTP/SSE

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

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

Which MCP Server Should You Choose?

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

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

Feature & Specification Comparison

Specification	C Crystallize MCP Browser Automation	Agent Device callstackincubator Browser Automation
Summary	Crystallize headless commerce tools for AI agents via Model Context Protocol	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.
Category & Scope	Browser Automation

Tools & Capabilities Breakdown

Crystallize MCP Tools (16)

browse_catalogue

Traverse the item tree by path

get_item

Fetch an item by path or ID with full component data

search_catalogue

Keyword search across all items

get_product_variants

List variants with pricing and stock

list_discovery_shapes

List all shapes with their queryable fields

browse_shape

Browse items of a shape with filters, pagination, and field selection

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).

Crystallize MCP Configuration

mcpServers (Claude Desktop / Cursor)

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

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"
    }
  }
}

Frequently Asked Questions

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

More alternatives to Crystallize MCP More alternatives to Agent Device Browser Automation category hub Canonical compare URL