The Analyze Website Content Performance API allows developers and businesses to instantly evaluate the technical performance of any web page by simply providing its URL. Based on advanced metrics and real-time analysis, this API provides accurate information about how efficiently a site loads, executes scripts, and manages layout stability. By returning structured diagnostic data, it helps identify performance bottlenecks, JavaScript execution overloads, caching inefficiencies, and cumulative layout shifts that can negatively impact the user experience.
When a request is made, the API generates a comprehensive performance audit that includes key metrics such as startup time, CPU usage, script parsing and compilation duration, and total JavaScript execution time. It also evaluates caching efficiency to determine whether assets are served with optimal lifetime, and provides details on layout shifts to assess visual stability during page load. The API reports the number of scripts, fonts, and requests made by the web page, as well as metrics such as total block time (TBT), cumulative layout shift (CLS), and first contentful paint (FCP).
Essentially, the Analyze Website Content Performance API acts as an automated digital performance auditor. It helps you identify where resources are being wasted, where rendering delays occur, and how to prioritize critical requests. Whether you manage large-scale websites or individual landing pages, this API provides the transparency and actionable data needed to maintain top-notch web performance, improve SEO rankings, and ensure a smooth browsing experience across all devices.
Analyze the web performance of any URL, detect JavaScript execution time, caching, and recommended optimizations to improve speed and efficiency.
Perfomance Information - Endpoint Features
| Object | Description |
|---|---|
url |
[Required] |
{"Example Response":"No response example available for now."}
curl --location --request GET 'https://zylalabs.com/api/10784/analyze+website+content+performance+api/20438/perfomance+information?url=https://google.com' --header 'Authorization: Bearer YOUR_API_KEY'
| Header | Description |
|---|---|
Authorization
|
[Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed. |
No long-term commitment. Upgrade, downgrade, or cancel anytime. Free Trial includes up to 50 requests.
The API returns structured diagnostic data that includes metrics such as startup time, CPU usage, total JavaScript execution time, caching efficiency, and layout stability indicators like cumulative layout shift (CLS) and first contentful paint (FCP).
Key fields in the response include startup time, total block time (TBT), number of scripts and requests, JavaScript execution time, caching details, and layout shift metrics, which help assess overall web performance.
The response data is organized in a structured JSON format, with sections dedicated to performance metrics, caching information, and layout stability. Each section provides specific values and descriptions for easy interpretation.
The primary parameter for the endpoint is the URL of the web page to analyze. Users can customize their requests by specifying additional parameters, such as desired metrics or analysis depth, if supported.
The data is sourced from real-time analysis of the provided URL, utilizing web performance measurement techniques and metrics derived from browser behavior, ensuring accurate and relevant performance insights.
Typical use cases include optimizing website performance, improving SEO rankings, identifying bottlenecks in loading times, and enhancing user experience by addressing layout shifts and script execution delays.
Users can utilize the returned data to pinpoint performance issues, prioritize optimizations, and make informed decisions on resource allocation, ultimately leading to improved site speed and user engagement.
Data accuracy is maintained through continuous monitoring and analysis of web performance metrics, employing industry-standard measurement techniques and algorithms to ensure reliable and actionable insights.
To obtain your API key, you first need to sign in to your account and subscribe to the API you want to use. Once subscribed, go to your Profile, open the Subscription section, and select the specific API. Your API key will be available there and can be used to authenticate your requests.
You can’t switch APIs during the free trial. If you subscribe to a different API, your trial will end and the new subscription will start as a paid plan.
If you don’t cancel before the 7th day, your free trial will end automatically and your subscription will switch to a paid plan under the same plan you originally subscribed to, meaning you will be charged and gain access to the API calls included in that plan.
The free trial ends when you reach 50 API requests or after 7 days, whichever comes first.
No, the free trial is available only once, so we recommend using it on the API that interests you the most. Most of our APIs offer a free trial, but some may not include this option.
Yes, we offer a 7-day free trial that allows you to make up to 50 API calls at no cost, so you can test our APIs without any commitment.
Zyla API Hub is like a big store for APIs, where you can find thousands of them all in one place. We also offer dedicated support and real-time monitoring of all APIs. Once you sign up, you can pick and choose which APIs you want to use. Just remember, each API needs its own subscription. But if you subscribe to multiple ones, you'll use the same key for all of them, making things easier for you.
Please have a look at our Refund Policy: https://zylalabs.com/terms#refund
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