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A cached 301 redirect could explain why a short-link service records fewer requests than people make: after the first visit, a browser or intermediary may reuse the redirect without contacting the short-link server again. But the reported one-in-five count does not prove that caching caused the gap. You need the redirect’s response headers and server-side logs to confirm it.
How can a cached 301 make clicks disappear from server logs?
A 301 tells a client that a resource has moved permanently. Under RFC 9110, Section 15.4.2, a 301 response is heuristically cacheable unless the method definition or explicit cache controls indicate otherwise. The standard also says clients ought to use the new URI in future references.
On the first visit, the short-link service may receive a request and return a 301 with a Location header identifying the destination. If a client later reuses that cached redirect, it can go straight to the destination instead of requesting the short URL again. The short-link origin then has no new request to record for that visit. This is a possible HTTP-level explanation for a difference between human clicks and origin request counts—not proof of what happened on a particular service.
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Does a 301 mean a short-link service should count every click?
No. An origin request log counts requests that reach that origin; it is not necessarily a count of every human action. A cached redirect can bypass the origin, while other factors—such as whether an app or security scanner follows a link—can also make “click” counts differ between systems. The available facts do not establish which, if any, of these explains the reported one-in-five ratio.
Google’s documented Ads click measurement illustrates the distinction between where a redirect happens and where it is counted: Google says its system records a measured click after receiving the initial click transaction at its ads redirect server, then issues a non-cacheable HTTP 302 redirect. That is a description of Google’s system, not a universal requirement for link shorteners. Google also notes that a network interruption can keep a user who receives the redirect from viewing the advertiser’s site. Google Ads: About click measurement
What should you check before blaming 301 caching?
- Inspect the initial short-link response. Request the short URL and record its status code,
Location,Cache-Control, andExpiresheaders. The status code alone does not reveal the full cache policy. - Compare independent counts with origin requests. Check the service’s own request logs against a separate campaign or click source for the same period. Make sure the sources are counting comparable events.
- Repeat the test across relevant contexts. Compare a first visit and later visits in the browsers, apps, and networks used by your audience. A result from one client does not establish behavior in all clients.
- Review the redirect chain and query strings. Confirm that parameters needed by downstream systems survive each redirect, including any intermediate tracking hop.
These checks can show whether repeat requests are reaching the short-link origin and whether the redirect is configured to allow caching. To substantiate a specific ratio or cause, you would need service-specific response headers, cache or intermediary logs, redirect configuration, and request logs.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesShould a short link use 301 or 302?
Choose based on what the redirect means and what the service needs to measure. A 301 represents a permanent move; a 302 represents a temporary one. RFC 9110, Section 15.4.3 says a client ought to continue using the original target URI for future requests after a 302. Explicit cache controls also matter, so changing the status code alone does not guarantee that every client or intermediary will behave in a particular way.
| Consideration | 301 | 302 |
|---|---|---|
| Redirect meaning | Permanent move | Temporary move |
| Repeat-request implications | Heuristically cacheable unless cache controls or method rules indicate otherwise; a reused redirect may bypass the short-link origin. | Temporary redirect; clients ought to keep using the original target URI for future requests. Cache behavior still depends on applicable controls and implementation. |
| Search indexing | Google Search Central recommends a permanent server-side redirect when a URL has permanently moved. | Google Search Central recommends a temporary redirect for a temporary move. |
| Measurement choice | Origin request counts can miss visits served from a cached redirect. | A temporary redirect may suit a destination that can change and needs to be evaluated at the service, but it does not guarantee a particular click count. |
Google’s redirect guidance is about search behavior, not a universal rule for click analytics. Search indexing and click measurement can have different priorities: use the status that accurately describes the move, then set cache policy and measurement architecture to meet the other requirements. Google Search Central: Redirects and Google Search
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Are click counts and conversion attribution the same problem?
No. A redirect endpoint can receive and count a click while still losing information needed to connect a later conversion to that click. Google Analytics documents that if a redirect strips the GCLID parameter, a later conversion may no longer be associated with the original ad click; its guidance is to forward that identifier to the destination. This is an attribution failure, not evidence that the redirect server failed to receive the request. Google Analytics: Troubleshoot GCLID issues
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