How to Use the UserStack User-Agent Lookup MCP in Claude

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Connect UserStack User-Agent Lookup MCP to Claude Desktop

Create your Vinkius account to connect UserStack User-Agent Lookup to Claude Desktop and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup UserStack User-Agent Lookup with Claude Desktop

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Perplexity

Test client behavior against specific devices.

When you call `detect_user_agent`, the MCP Server parses any incoming User-Agent string. It immediately tells you if the client is on iOS, Windows, or some weird niche device. This lets you test how your web app will actually run across different operating systems. It’s perfect for QA: feed it a handful of real user agents and get structured data back—no guesswork needed.

Use the MCP Server to validate API inputs.

You can pass an agent's User-Agent header into `detect_user_agent` before calling another local service. The tool confirms the client context, giving you structured data on the browser and OS type. This helps prevent errors where your backend logic assumes a certain environment that might not be true for actual users.

Check compatibility across multiple browsers.

Don't waste time debugging cross-browser issues manually. `detect_user_agent` takes the agent string and outputs which browser (Safari, Chrome, Firefox) is being used, along with its major version number. This lets you build conditional logic in your code or chat prompts based on the client context.

Setup guide

Set up UserStack User-Agent Lookup MCP in Claude Web or Desktop

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.
3

Start a conversation

Open a new chat. The UserStack User-Agent Lookup MCP tools are available immediately — no restart needed.

Endpoint URL

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

No configuration file needed — paste the URL directly in the Claude web interface.

Available on Free (1 connector), Pro, Max, Team, and Enterprise plans.

Prerequisites

Claude Desktop installed (macOS or Windows)
Active Vinkius subscription with a valid endpoint token

1

Open Claude Desktop Settings

Click the menu icon at the top-left corner, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json in your default text editor.
2

Paste the UserStack User-Agent Lookup MCP configuration

Copy the JSON snippet on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Desktop

Close and reopen the application. Claude needs a full restart to load new MCPs — refreshing a conversation is not enough.
4

Verify the connection

Open a new conversation. Click the 🔌 icon at the bottom of the message input. You should see tools listed under userstack-user-agent-lookup-mcp.

json

{
  "mcpServers": {
    "userstack-user-agent-lookup-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by UserStack. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about UserStack User-Agent Lookup MCP in Claude Desktop

It gives you immediate, structured data about the user's environment. Instead of guessing if a bug is browser-specific, `detect_user_agent` tells you exactly which combination of device and OS caused the issue.

It takes any standard HTTP User-Agent string as input. The tool then runs it through its logic to break down the device, browser, and operating system details.

Absolutely. Since you're running on your machine via stdio transport, `detect_user_agent` is ideal for testing how external services interact with your locally served web apps.

Yes. Vinkius manages the connection to the MCP Server, handling authentication and ensuring calls are processed efficiently within the sandbox environment you've set up.

The server only processes the raw User-Agent string provided to it. It extracts metadata like OS and browser type but doesn't handle personal user identifiers or sensitive account credentials.

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