apilayer userstack

API

Secure JSON API for User-Agent String Lookup

Overview

apilayer userstack is a RESTful JSON API designed for secure user-agent string lookup. Its core endpoint accepts user-agent strings (or auto-detects from requests) and returns structured data including device type, browser name/version, OS details, platform, and device brand/model. Ideal for developers optimizing web content for specific devices, enhancing security via suspicious agent detection, powering analytics dashboards, or tailoring user experiences. It supports batch requests for multiple strings and ensures fast, reliable JSON responses.

Example Integration (JavaScript)

script.js JS


fetch('https://userstack.com/')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful API
JSON Responses
Secure Lookup
Auto-Detection Support
Batch Request Capability
Detailed Device/Browser/OS Insights

Frequently Asked Questions

? Is apilayer userstack free to use?

Yes, it offers a free tier with limited monthly requests. Paid plans are available for higher usage volumes and access to advanced features like batch requests.

? Does it require an API Key?

Yes, you need to register for an API key from the apilayer platform to authenticate all requests to the userstack API.

? What is the response format?

The API returns responses exclusively in JSON format, providing structured details such as device type, browser information, operating system, and platform.

Top Alternatives

DeviceAtlas API Search Google

uaParser Cloud API Search Google

Tool Info

Pricing Freemium

Category Development

Platform Public API

Pros

⊕ Easy integration with REST endpoints
⊕ Comprehensive structured data
⊕ Secure HTTPS requests
⊕ Scalable pricing plans
⊕ Fast response times

Cons

⊖ Requires API key authentication
⊖ Free tier has rate limits
⊖ Advanced features locked behind paid plans