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User-Agent Parser & Browser/OS/Bot Detector
x402
User-Agent Parser & Browser/OS/Bot Detector is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Parses a User-Agent string into browser, OS, device type, and bot/crawler identity using pure local regex — no upstream calls
Price / call$0.001
Success—
StatusUnknown
How this service works
User-Agent parser / UA classifier / browser detection / OS detection / bot detection / AI crawler identifier (GPTBot, ClaudeBot, PerplexityBot). Pure-local regex parser — detects browser (Chrome, Firefox, Safari, Edge, Opera, Vivaldi, Samsung), OS (Windows, macOS, iOS, Android, Linux, ChromeOS) with version, device type (desktop / mobile / tablet / bot), and identifies 32+ specific bots/crawlers. No upstream call.
Output
Returns structured JSON with browser name and version, OS name and version, device type (desktop/mobile/tablet/bot), and if a bot, the specific bot/crawler identity (e.g. GPTBot, ClaudeBot, PerplexityBot) from a library of 32+ known crawlers
Example use cases
Example prompt
“Parse this User-Agent string for me and tell me the browser, OS, device type, and whether it's a known bot or AI crawler: 'Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Mobile Safari/537.36'”
Technical details
Endpoint
POSThttps://x402-deployer.x402-deployer.workers.dev/user-agent-parseWhen to prefer
Choose this endpoint when you need fast, offline-style UA parsing with no external API dependency. Ideal for classifying incoming HTTP requests, auditing logs for AI crawler traffic, or filtering bots from analytics — especially when you need to distinguish GPTBot, ClaudeBot, or PerplexityBot from regular browsers. Prefer over full-stack analytics platforms when you just need lightweight, single-string parsing.
Side effects
- Missing or empty user-agent string — returns error or null fields
- Unrecognized or highly obscure UA string — returns 'unknown' for some fields
- Malformed JSON request body — returns 400 error
- Partial match where bot is not in the 32+ known list — device_type may say 'bot' but bot_name may be null
Input
{
"user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"os": {
"name": "Windows",
"version": "10.0"
},
"bot": null,
"device": {
"type": "desktop"
},
"is_bot": false,
"source": "DIY regex parser",
"browser": {
"name": "Chrome",
"version": "120.0.0.0"
},
"user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
}Tags
x402
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