User Agent Generator API

About the User Agent Generator API

User Agent Generator works by generating a random user agent string based on the browser, operating system, and device. It returns the generated user agent string in a structured format.

What people use it for

Web Scraping Rotation

Rotate header strings across crawler requests by passing mobile or desktop targets to mimic different visitors and reduce detection.

Cross Browser QA

QA engineers feed randomized browser versions and operating systems into automated test suites to verify responsive UI rendering without physical devices.

Analytics Parser Benchmarking

To test telemetry parsers, supply generated strings into internal pipelines to check whether software accurately detects incoming browser and operating system families.

Honeypot Client Simulation

When staging decoy network services, configure mock client sessions with realistic tablet and desktop signatures to inspect incoming bot behavior.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON

Default REST response

XML

Markup format

YAML

Human-readable

CSV

Tabular export

Beta

GraphQL

Query language

New

MCP

For AI agents

Request parameters — GET /v1/useragentgenerator

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Optional

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curl "https://api.apiverve.com/v1/useragentgenerator?device=desktop" \
  -H "x-api-key: YOUR_API_KEY"

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Response — GET /v1/useragentgenerator

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

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{
  "status": "ok",
  "error": null,
  "data": {
    "ua": "Mozilla/5.0 (Windows NT 6.4) AppleWebKit/537.36.0 (KHTML, like Gecko) Chrome/94.0.0.0 Safari/537.36.0",
    "browser": {
      "name": "Chrome",
      "version": "94.0.0.0",
      "major": "94"
    },
    "engine": {
      "name": "Blink",
      "version": "94.0.0.0"
    },
    "os": {
      "name": "Windows",
      "version": "10"
    },
    "device": {},
    "cpu": {}
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

What a call costs — 2 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Zero-code embed — one snippet, no backend

Drop an interactive User Agent Generator form onto any page. The widget calls the API for you, so no key ever appears in your markup and there is nothing to deploy.

Changelog — User Agent Generator API

Every change to this endpoint, newest first. Breaking changes ship as a new version and the previous one keeps serving — response fields are added, never removed or retyped in place, so an integration written against v1 keeps working.

Currently v1