The HTTP User-Agent request header is a characteristic string that lets servers and network peers identify the application, operating system, vendor, and/or version of the requesting user agent.
On the Web, a user agent is a software agent responsible for retrieving and facilitating end-user interaction with Web content. This includes all web browsers, such as Google Chrome and Safari, some email clients, standalone download managers like youtube-dl, and other command-line utilities ...
Jul 11, 2025 ... A user agent is a computer program representing a person, for example, a browser in a Web context. Besides a browser, a user agent could be a bot scraping ...
With this extension, you can quickly and easily switch between user-agent strings. Also, you can set up specific URLs that you want to spoof every time.
Jan 23, 2026 · To create and manage agents with Copilot Studio, you need: A license for each user, also known as a per user license (or Copilot Studio User License as referred to on the Microsoft 365 admin center). Assign this license to individual users who need access to create and manage agents. A license for your organization, also known as a tenant license (or Copilot Studio as referred to on the ...
This extension is designed to shield your online privacy and make it super easy to appear as if you're browsing from different devices.
Oct 7, 2023 ... It's historically used as a signal to which browser you're using or what bot you are. Some sites (looking at you Google) use it or some other technique to ...
Google Admin Toolbox Useragent ; Mozilla Compatibility, Mozilla 5.0 ; Platform, Linux; Android 6.0.1; Nexus 5X Build/MMB29P ; Layout Engine, AppleWebKit 537.36 ...
3 days ago · Learn how memory scaling allows AI agents to improve with every interaction. Databricks Research shares data on boosting accuracy and efficiency using MemAlign.
It's a short, technical description of the web browser, operating system, (and maybe mobile device) that you're using as you access the internet. Your web browser sends it to every website you visit.
Usage example: You can alter your user-agent string to indicate you?re on a mobile device if you prefer seeing mobile versions of sites so they load quicker. -- This extension allows you to spoof your browser "user-agent" string to a custom designation, making it impossible for websites to know specific details about your browsing arrangement.
A user agent is a text string sent by your browser or script during an HTTP request to identify the client’s software and operating environment to the server. It typically includes the browser name, version, operating system, and, occasionally, the device type.
With this extension, you can quickly and easily switch between user-agent strings. Also, you can set up specific URLs that you want to spoof every time. Please note that this does not provide improved privacy while browsing the Internet and that some sites might have other means to figure out that the browser is not what it pretends to be.
Your browser sends its user agent to every website you connect to.
In its simplest form, a user agent is a line of text or string that identifies the browser to the web server. While that may sound simple, understanding how user agents function can be a bit complicated.
Find out your user agent string, browser, opera system, device and more with this tool. Learn what a user agent is and how it is used for feature detection and compatibility.
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Introduction Custom agents allow you to tailor Copilot's expertise for specific tasks. When you prompt Copilot to carry out a task it may choose to use one of your custom agents, if Copilot determines that the agent's expertise is a good fit for the task. Work performed by a custom agent is carried out using a subagent, which is a temporary agent spun up to complete the task. The subagent has ...
Creating a custom agent profile in JetBrains IDEs Open the GitHub Copilot Chat window in your JetBrains IDE. From the agents dropdown at the bottom of the chat view, click Configure Agents..., then in the settings window, under "Chat Agents", click Workspace. Enter a file name for the custom agent. This is the default name that appears in the agents dropdown. Configure the agent profile in the ...
The user agent string format is currently specified by section 10.1.5 of HTTP Semantics. The format of the user agent string in HTTP is a list of product tokens (keywords) with optional comments. For example, if a user's product were called WikiBrowser, their user agent string might be WikiBrowser/1.0 Gecko/1.0. The "most important" product component is listed first. The parts of this string ...
Nov 28, 2025 · Configure authentication with your identity provider to enable users to sign in when having an agent conversation.
What is an user-agent? The User-Agent request-header field contains information about the user agent originating the request. This is for statistical purposes, the tracing of protocol violations, and automated recognition of user agents for the sake of tailoring responses to avoid particular user agent limitations.
The User-Agents.Net website provides various user agent lists and technical information about them.
Understand what information is contained in a Chrome user agent string. Get an analysis of your or any other user agent string. Find lists of user agent strings from browsers, crawlers, spiders, bots, validators and others..
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Discover what a user agent is and how it facilitates web interactions. Learn about User-Agent strings and their role in web optimization.
免费在线 User Agent 查询与解析工具，快速识别浏览器内核、操作系统、设备型号及CPU架构。支持一键获取本机UA，精确分析爬虫与移动端标识，是 Web 开发、兼容性测试与日志分析的实用助手。
4 days ago · Anthropic PBC today launched Claude Managed Agents, a cloud service that customers can use to build artificial intelligence agents. The company says the offering shortens the development workflow ...
A comprehensive list of User Agent strings for the most popular devices in use today. It includes Android, iPhone, Windows, tablets, desktops, bots and ...
Grab the most up-to-date user agents for Chrome, Safari, Firefox, and Edge. These are essential for web scraping, automated screenshots, and bypassing bot blocks.
In trying to determine from my Urchin stats which browsers visitors are using I'm confused by what "Mozilla Compatible Agent" actually means.
This is a simple utility for users who want to discover the 'user-agent' given by the device by default - "Display browser User-Agent and other useful device info." Bloatware is an odd description for a 1.37MB app.
UserAgent分析和查询工具能通过UA分析出浏览器名称、浏览器版本号、浏览器渲染引擎、浏览器操作系统等信息，并且详细列出了常见的PC端浏览器UserAgent、移动设备端UserAgent列表。
Apr 17, 2013 ... User Agent string provide information on application type, operating system, software vendor / version and layout rendering engine.
The HTTP header User-Agent is a request header that sends a characteristic string to web servers, allowing them to identify the Operating System (OS) and browser of the client making the request. Every time your browser connects to a website, it includes the User-Agent field in the HTTP header.
We've collected millions of user agents and have categorised a selection of them here for you, based on many of the things we detect about them - Operating System, Browser, Hardware Type, Browser Type, and so on.
A user agent is a relatively short bit of text that (attempts to) describe the Software/Browser (the "Agent") that is making the request to a website. Web browsers include the user agent string in the requests they make to websites.
Since this criterion was written, the HTML Living Standard has adopted specific requirements governing how user agents must handle incomplete tags, incorrect element nesting, duplicate attributes, and non-unique IDs.
For example, a website might use the user agent string to determine if you’re on a mobile device. If so, it will serve you the mobile-optimized version of the site, which is designed to load quickly and be easy to navigate on a smaller screen. Similarly, if you’re using an older browser, the website might serve you a simpler version of the site that’s compatible with your browser’s capabilities.
Answer: In W3C usage, a user agent is a browser, media player, or extension. It is the software that delivers the content, not the content itself. The W3C User Agent Accessibility Guidelines (UAAG) 2.0 definition of a user agent.
In short, a User Agent (UA) is a text string that acts like a “digital ID card” or “passport” your web browser (or any internet connected software) automatically sends to the server of each website you visit.
A user agent is a type of software that acts as an intermediary between a user and a network service, like a website.
User-agent checker instantly tells your browsers user agent. User-agent is the identifier which lets the server know what browser is requesting the resource or what operating system the request initiator uses.
Back in 2005 I wrote my first user agent analyzer for reporting purposes. It used sequences of rules in a (proprietary) pattern matching language and the first rule that matched was used for the output. This worked quite well for the attributes I needed (things like Operating System and Browser). Yet after a while I found that the variations in the user agent strings was so large it became a maintenance nightmare.