User agent

Yandex Browser on Windows

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 YaBrowser/26.6.0.0 Safari/537.36

Everything the User Agent API resolves from the string above — the client and its rendering engine, the companies behind both, the operating system, the hardware, and every flag it sets — followed by a ready-to-run request that returns exactly this as JSON.

Operating system

The platform the client is running on, its version, and the organization behind it.

Operating system: Windows
OS version: 10
OS version (major): 10
OS maker: Microsoft

Automation flags

Whether the API considers this agent automated, and what kind — the check most callers reach for first.

AI assistant

AI crawler

Bot

Crawler

Parse this user agent with the API

Send this exact string to the User Agent API and get everything above back as one JSON record. Copy the snippet for your language and drop in your own API key.

curl node javascript python php ruby go rust java C# swift

curl "https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36&pretty=1" \
  -H "Authorization: Bearer YOUR_API_KEY"

const response = await fetch(
  'https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36',
  { headers: { 'Authorization': 'Bearer YOUR_API_KEY' } }
);
const data = await response.json();

fetch(
  'https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36',
  { headers: { 'Authorization': 'Bearer YOUR_API_KEY' } }
)
  .then(function (response) { return response.json(); })
  .then(function (data) { console.log(data); });

import requests
response = requests.get(
  'https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36',
  headers={'Authorization': 'Bearer YOUR_API_KEY'}
)
data = response.json()

$ch = curl_init('https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['Authorization: Bearer YOUR_API_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);

require 'net/http'
require 'json'
uri = URI('https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36')
request = Net::HTTP::Get.new(uri)
request['Authorization'] = 'Bearer YOUR_API_KEY'
response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end
data = JSON.parse(response.body)

package main
import (
  "encoding/json"
  "io"
  "net/http"
)
req, _ := http.NewRequest("GET", "https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36", nil)
req.Header.Set("Authorization", "Bearer YOUR_API_KEY")
resp, _ := http.DefaultClient.Do(req)
defer resp.Body.Close()
body, _ := io.ReadAll(resp.Body)
var data map[string]interface{}
json.Unmarshal(body, &data)

use reqwest::blocking::Client;
use serde_json::Value;
let client = Client::new();
let response = client
  .get("https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36")
  .header("Authorization", "Bearer YOUR_API_KEY")
  .send()?;
let data: Value = response.json()?;

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
  .uri(URI.create("https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36"))
  .header("Authorization", "Bearer YOUR_API_KEY")
  .GET()
  .build();
HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
String body = response.body();

using System.Net.Http;
using System.Net.Http.Json;
using System.Text.Json;
var client = new HttpClient();
client.DefaultRequestHeaders.Add("Authorization", "Bearer YOUR_API_KEY");
var data = await client.GetFromJsonAsync<JsonElement>(
  "https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36");

import Foundation
var request = URLRequest(url: URL(string: "https://api.restcountries.com/user-agent/v1?ua=Mozilla%2F5.0%20%28Windows%20NT%2010.0%3B%20Win64%3B%20x64%29%20AppleWebKit%2F537.36%20%28KHTML%2C%20like%20Gecko%29%20Chrome%2F148.0.0.0%20YaBrowser%2F26.6.0.0%20Safari%2F537.36")!)
request.addValue("Bearer YOUR_API_KEY", forHTTPHeaderField: "Authorization")
let (data, _) = try await URLSession.shared.data(for: request)
let json = try JSONSerialization.jsonObject(with: data)

Integrate user agent parsing into your app

The User Agent API turns any user agent string into structured JSON over HTTPS, ready to pull straight into web, mobile, and backend projects with no regex of your own to maintain as browsers change.

Split real browser traffic from bots and crawlers in your logs.
Serve the right download or install instructions per platform.
Break analytics down by browser, version, and device type.
Flag visitors on browser versions you no longer support.

Read the API docs

Browse more user agents

All popular user agents