---
title: Prefetch requests
description: Learn how the system handles prefetch requests to ensure that only actual user clicks are counted in LMS redirects, E-Delivery click tracking, and Lynx tracking links.
---
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# Prefetch requests
## Learn how the system handles prefetch requests to ensure that only actual user clicks are counted in LMS redirects, E-Delivery click tracking, and Lynx tracking links.
Modern web browsers frequently use resource prefetching and prerendering to speed up web browsing. When a browser detects that a user might click a link (for example, hovering over a URL, typing in the omnibox, or when a webpage includes ``), it may initiate a background request before an actual click occurs.
Without prefetch filtering, these background requests could be mistakenly registered as real user clicks or redirects, distorting analytics and reports.
Phonexa automatically identifies browser prefetch and prerender requests and skips counting them as live user engagement across LMS, E-Delivery, and Lynx.
The feature is enabled by default and does not require any additional configuration.
### Use Case
A Publisher reviewing click reports sees only real consumer engagement, so payouts and conversion rates aren't inflated by automatic browser activity.
When a client or webpage triggers an HTTP request, the browser includes the standard Sec-Purpose header if the request is an automated prefetch or prerender. Phonexa detects and filters out requests containing any of the following header values:
- `Sec-Purpose: prefetch`
- `Sec-Purpose: prerender`
- `Sec-Purpose: prefetch;prerender`
- `Sec-Purpose: prerender;prefetch`
When any of these headers are detected on tracking endpoints:
- **LMS Redirects:** The redirect logic is skipped. The background request is not registered or logged as a redirect event in Lead Details or Traffic Flow reports. *Read more about the* [*Buyer Lead Details*](https://support.phonexa.com/buyer-report-lead-details?hsLang=en)*,* [*Publisher Lead Details*](https://support.phonexa.com/publisher-reports-lead-details?hsLang=en)*, and* [*Traffic Flow*](https://support.phonexa.com/traffic-flow?hsLang=en) *reports in the Knowledge Base articles.*
- **E-Delivery Event Tracking:** Automated prefetch requests do not trigger click-tracking events or alter campaign click rates.
- **Lynx:** Continues to ignore prefetch requests for tracking links.
Only when a user genuinely clicks or navigates to the destination link will the request proceed normally with full tracking, logging, and redirect execution.
### Supported Components & Impact
| **Component** | **Behavior Before** | **Current Behavior** |
| --- | --- | --- |
| Lynx (Tracking Links) | Filtered prefetch requests. | Unchanged (standard behavior maintained). |
| LMS (Lead Redirects) | Background prefetch could record a redirect event or trigger redirect-based rules. | Ignored. Only actual user clicks trigger and record the redirect. |
| E-Delivery (Click Tracking) | Prefetched links in emails or landing pages could count as user clicks. | Ignored. Click events are recorded only upon real navigation. |
### Benefits
- **More accurate click counts:** Reports exclude automatic browser requests that do not represent actual visitor clicks.
- **More reliable conversion metrics:** Excluding prefetch requests helps prevent click counts and conversion metrics from being inflated by background browser activity.
- **Reduced duplicate tracking:** Excluding prefetch requests helps prevent tracking rules associated with LMS redirects from being triggered by requests that do not represent actual clicks.
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