How to Use the UserStack User-Agent Lookup MCP in OpenAI Agents SDK

Q: How does UserStack User-Agent Lookup work with OpenAI Agents SDK?

The MCP Server exposes the detectuseragent tool. Your agent calls this tool, sending a raw User-Agent string and getting back structured data identifying the device, browser, and OS.

Get User-Agent details for your OpenAI Agents SDK deployments.

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Connect UserStack User-Agent Lookup MCP to OpenAI Agents SDK

Create your Vinkius account to connect UserStack User-Agent Lookup to OpenAI Agents SDK 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 OpenAI Agents SDK

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Determine Client Origin with MCP Server

The `detect_user_agent` tool pulls the device, browser, and operating system directly from a user's User-Agent string. Your agent gets clean data points it can use immediately for routing or personalization. It helps your specialized agents make decisions based on where the request originated. Instead of guessing, you run an action that validates the client context before any heavy lifting starts.

Build Production Agents with MCP Server

When you pass `UserStack User-Agent Lookup` into your Agent constructor, it auto-discovers the tool without extra setup. This means your agent's logic can check device types as part of its core workflow. Because OpenAI agents have built-in guardrails, they won't act on bad data or try to misuse the UA lookup results—it keeps your deployed product safe.

Validate User Context with MCP Server

Your agent can now check if a connection is coming from a specific browser family or OS using `detect_user_agent`. This gives you the necessary context to narrow down potential bugs or usage patterns. If you need to restrict access based on device type, the UA lookup tool provides the definitive answer. It’s better than just checking HTTP headers; it's a full analysis.

Setup guide

Set up UserStack User-Agent Lookup MCP in OpenAI Agents SDK

Prerequisites

Python 3.10+ installed
openai-agents package (pip install openai-agents)
Active Vinkius subscription with a valid endpoint token

1

Install the SDK

Run pip install openai-agents to install the OpenAI Agents SDK. The MCP integration is built-in — no extra dependencies needed.
2

Connect via SSE transport

Use MCPServerSse with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. The SDK auto-discovers all UserStack User-Agent Lookup tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives UserStack User-Agent Lookup tools as native definitions — JSON schemas resolve automatically.
4

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate UserStack User-Agent Lookup tools and returns structured results. Copy the full example on the right to get started.

agent.py

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerSse

async def main():
    async with MCPServerSse(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as server:
        agent = Agent(
            name="UserStack User-Agent Lookup Agent",
            instructions="You have access to UserStack User-Agent Lookup tools.",
            mcp_servers=[server],
        )
        result = await Runner.run(agent, "List recent transactions")
        print(result.final_output)

asyncio.run(main())

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Common questions about UserStack User-Agent Lookup MCP in OpenAI Agents SDK

The MCP Server exposes the `detect_user_agent` tool. Your agent calls this tool, sending a raw User-Agent string and getting back structured data identifying the device, browser, and OS.

Yes. You pass the MCP Server into your agent setup, and it treats `UserStack User-Agent Lookup` like any other available tool, allowing you to incorporate context checks directly into your logic.

It provides three key pieces of information: the detected device type, the browser family, and the operating system. This structured output helps your agent make highly specific decisions.

No. The tool is designed to be fast, letting you check context without slowing down the overall execution flow of your production agents.

The server handles the raw User-Agent string. The resulting data passed to your agent is abstracted device, browser, and OS type, limiting exposure while keeping functional context.

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