HOW IT WORKS
Detect Browser, Engine,
OS, CPU, and Device
Generating a realistic
Random UserAgent
Lightening Fast Response
Relatively Small Footprint
WHERE TO USE USER AGENT API
Identify device or browser capabilities & send content compatible with the device, browser type, Optimize website content for mobile, tablet, and other devices
Tailor advertising content by understanding Browser, Engine, OS, CPU, and Device type/model, etc.
Detect automated bots and crawlers, protect web resource by identifying the type of the traffic.
WHY USE USER AGENT API
Our easy-to-integrate API can help you gain valuable insights about your users that you wouldn't have been able to detect before. With our service, you'll be able to make data-driven decisions faster than ever.
Generate realistic Random User Agents with our API and get accurate results in just a few seconds. Our lightening fast response time makes it easier for you to quickly test different user agents and make decisions based on the data.
APITier's mobile friendly JSON API is designed to offer the same performance regardless of whether it's accessed from a web browser or a mobile device. This ensures that all your users get a consistent experience when using your app or website.
Simple, transparent pricing
1 credit = $0.001 — one shared balance across all your APIs and AI Agents. No per-product plans. No surprises.
Monthly
Annual
Free
Free
1,000 credits / month
All APIs & AI Agents
1,000 credits / month
Developer portal
Full API documentation
Community support
Starter
$9
/ month
15,000 credits / month
All APIs & AI Agents
15,000 credits / month
Developer portal
Full API documentation
Email support
Growth
$29
/ month
50,000 credits / month
All APIs & AI Agents
50,000 credits / month
Advanced security controls
SLA agreement
Priority email support
Professional
$79
/ month
150,000 credits / month
All APIs & AI Agents
150,000 credits / month
Advanced security controls
SLA agreement
Dedicated support
Priority processing queue
Business
$199
/ month
450,000 credits / month
All APIs & AI Agents
450,000 credits / month
Advanced security controls
Enhanced SLA
Dedicated support
Custom integration support
Bespoke development options
All plans include access to every API and AI Agent. Credits are shared across products — no per-API quotas. Unused credits on paid plans do not roll over. UK PostCode API has its own separate pricing — see below.
What counts as 1 credit?
Each API call or Agent invocation deducts from your shared credit balance.
| API / Agent | Credits per call |
|---|---|
| Email Validation | 2 credits |
| Phone Validation | 1 credit |
| VAT Number Validation | 1 credit |
| India Pincode Lookup | 1 credit |
| QR Code Generation | 2 credits |
| Barcode Generation | 2 credits |
| Data Format Conversion | 2 credits |
| Web Screenshot (Conversion) | 3 credits |
| Checkout Signals | 5 credits |
| Address Agent — Validate | 40 credits |
| Address Agent — Enrich | 55 credits |
| Business Verify Agent | 50 credits |
| Lead Agent — Validate | 60 credits |
| Director Search Agent | 60 credits |
| KYC Agent — Onboard | 150 credits |
| Company Lookup | 5 credits |
| PSC Lookup | 5 credits |
Example: Growth plan ($29/mo)
50,000 credits / month gets you:
Email validations
25,000
QR code generations
25,000
Web screenshots
16,666
Address Agent calls
1,250
Lead Agent queries
833
Business Verify calls
1,000
Mix and match — your credits work across all APIs and Agents.
A user agent is a software agent that is acting on behalf of a user, such as a web browser or a mobile app. The user agent sends requests to web servers and receives responses from them, typically in the form of web pages.
The user agent string is a piece of information that is sent by the user agent to the web server as part of the request. It identifies the user agent and provides information about the user agent's capabilities and preferences. The user agent string can be used by the server to tailor the content of the response to the specific user agent or to detect fraudulent or malicious activity.
The User Agent API is a browser-based API that allows web developers to access the user agent string of the client browser. The user agent string is a piece of information that is sent by the user agent (such as a web browser) to the web server as part of the request. It identifies the user agent and provides information about the user agent's capabilities and preferences.
Register Free (without providing Card Details) with an email and password.
All plans are Pay As You Go. Once API Key credit is purchased valid for a year.
At the moment, our all plans are Pay As You Go. Once a credit is purchased valid for a year.