Yep Proxy: Setting Up Measurement on an Engine That Crawls Its Own Index
Yep is a search engine built on an index it collects with its own crawler, and it makes a principle of not building individual profiles. These two characteristics both make regional comparison with a proxy easier and let you see more clearly which difference genuinely comes from the network.
Independent indexThe role the exit address plays on a self-crawled index.
02
PersonalisationIsolating session state on an engine that does not build profiles.
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Commercial queriesHow the ad and shopping surface appears differently by country.
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Long seriesMaintaining consistency in monitoring records spread over weeks.
The technical fact that sets Yep apart from other surfaces is that its results largely come from the index its own crawler collects. The team that develops the engine has run its own web-crawling bot for a long time and built the search side on top of that accumulated work. In practice this means the result is not a repackaged version of a shared engine.
The second distinguishing point is on the personalisation side. The engine states clearly that it does not build individual profiles and does not shape results according to such a profile. For someone taking measurements this is good news: one of the variables that distorts results is disabled from the outset, leaving the network side and interface preferences.
What is described here is for verifying how the public result surface looks from different countries. If you are planning automated and high-volume access, the engine's rules and robots.txt directives are binding.
What does the exit address change on an engine that crawls its own index?
The index stays on its own side; your exit address does not change the index's content. What it changes is the information about which country the request comes from, and that information is usually useful in two places: in the language and region assumption, and in the weight of country-specific domains in the ranking. In other words, a proxy here affects not the index but the context accompanying the question put to the index.
One consequence is that the difference does not show up on every query. When you search for the definition of a technical term, the weight carried by the country signal is low and you get almost the same list from two different exits. For a local service, a current development or a country-specific regulatory query, the difference becomes pronounced.
Building the measurement plan accordingly is also right from a budget standpoint. First determine with a small query set which queries are sensitive to the network side; apply country diversification only to those queries. Taking measurements from multiple countries for insensitive queries produces copies, not data.
Which network class the exit belongs to is also an input. Datacenter blocks and residential subscriber blocks sit in different autonomous systems; the ASN and IP reputation article explains how this classification is read. For comparative reading, Mojeek , likewise an engine with an independent index, is a good reference point.
Where does session state hide on an engine that does not build profiles?
If there is no personalisation, not everything becomes repeatable by itself. State that can affect the result still accumulates in three places: preferences held in the browser, the language and region settings you select in the interface, and the exit on the network side. The first two accompany the request and carry into the output even without an individual profile.
The most common confusion is taking language and country to be the same thing. Selecting Turkish as the interface language and taking measurements from a Japanese exit is a consistent setup, and the two work independently of each other. The problem is one of them changing mid-run; from that point on you cannot say which difference came from where.
In practice this arrangement works: a separate, clean browser profile for each country, a single language value per profile, and a single exit that does not change throughout the run. Close the profile when the run ends; cookies carried over into the next run are the most insidious source of noise.
Open the profile from scratch on every run; do not work on top of the previous one.
Set the language and region preference when opening the profile and do not touch it again.
Do your normal searches on the same machine in a different profile.
Note it in the record when the browser version changes; the page structure may change.
Note
The absence of personalisation does not mean your request leaves no trace. The proxy server can see which domain you connect to; HTTPS content cannot be read, but the target information stops at the exit. Choosing a provider is therefore as much a trust decision as a technical one.
The states a measurement run passes through
Thinking of a run as a single action hides errors. In reality there are four separate states, and different things can go wrong in each. In the preparation stage the exit, language and profile are set; an error made here invalidates the whole run because it is hard to notice afterwards.
In the request stage the queries are sent in sequence. The critical variable of this stage is pace: sending large numbers of requests in a short time leads to verification screens and dropped connections. Keeping the intervals reasonable directly raises the run's completion rate.
In the verification stage you check whether each response is genuinely usable: did the page load fully, does the expected country appear, did the result block come back empty. Setups that skip this step count half-loaded pages as data too and produce unexplained drops in the series.
The final stage is recording. A timestamp, exit label, language value and device profile are written next to every measurement. Without these four fields, explaining an anomaly three weeks later is impossible.
DIAGRAMThe four states of a measurement run
You can scroll the diagram horizontally to inspect it
A setup that skips the verification step counts half-loaded pages as valid measurements too.
Which hops does the request pass through?
A query's journey passes between four actors: your client, the proxy exit, the engine's front end and the record store where you keep the measurement. The client hands the request to the proxy, the proxy connects to the target, the response returns by the same route, and you write the response into the record. Each hop adds latency and a chance of error.
For HTTPS targets the proxy opens a tunnel with CONNECT and carries the encrypted bytes; it cannot read the content. If you use SOCKS5, where name resolution is performed is decisive: the variant that leaves resolution to the proxy and the variant that resolves locally behave differently, and in regional measurement that difference can show up in the result. Details in where DNS is resolved in SOCKS5 the article.
Knowing which hop you are at when an error comes back shortens the diagnosis. 407 points to authentication between the proxy and the client; the target was never reached. A timeout mostly occurs on the leg between the proxy and the target. An error page returned by the engine, on the other hand, shows that the chain was traversed to the end.
Test the chain end to end once before the run. Proxy checker tool tells you whether the exit is live, and my IP address tells you which country you appear as from the outside.
DIAGRAMThe query's journey between the actors
You can scroll the diagram horizontally to inspect it
Diagnosis starts at whichever leg the error occurred on; 407 shows that the target was never reached.
An exit plan for your Yep monitoring scheme
A fixed exit is preferred for long single-country series, and a broad pool for multi-country sampling.
Choose whichever you need from our residential proxies, datacenter proxies, IPv6 and ISP solutions. Every plan comes with unlimited options, 99.9% uptime, rotating proxies, sticky sessions and 24/7 support. Ideal for web scraping, ad verification, SEO monitoring and digital data collection.
ISP ProxyStatic Turkish IPs registered to an ISP
ISP-registered static Türkiye IPs; they combine datacenter speed with the reputation of a real carrier. Ideal for long sessions and low-ping use.
How do the ad and shopping surface shift by country on commercial queries?
The team developing Yep announced a model aiming to share the bulk of ad revenue with content creators. This means the engine's commercial surface is still maturing; do not assume that a placement you see on one query will be found in the same form in another country. When measuring, first verify whether the placement exists in that country, then compare its content.
On the organic side, commercially intended queries are relatively sensitive to country. When you search the same product name from different exits, the store domains returned, the share of country-extension addresses and the visibility of local retailers can change. If you are doing price comparison, this list is your first signal before going to the sites' own pages (proxy for price comparison).
It is important not to conflate two sources. A change in the result list is the engine's decision; the price, currency or shipping information you see on a store page is the site's decision and can vary by exit country. A table that writes both into the same column reduces two different phenomena to a single number.
Observation
Who makes the decision?
How it is recorded
Domains in the result list
Search engine
Together with the position number
Presence of a commercial placement
Search engine
A separate field as present / absent
Price and currency on the page
Target site
In a separate table, with a separate timestamp
Shipping and stock information
Target site
Not mixed into the measurement series
Maintaining consistency in a series spread over weeks
In a long monitoring series the real enemy is not sudden changes but unnoticed drift. Within a week the exit pool shifts to a different city, the browser updates itself, a teammate changes the language setting; a break appears in the chart and everyone assumes the engine changed something.
The way to prevent this is to keep records tied to the run plan rather than to the individual run. Which queries, which countries, at which hours, with which exit labels will be run — write this plan once and verify compliance with it on every run. Write runs that deviate from the plan into a separate area, not into the series.
The second technique is keeping a reference series. Run the same query set regularly from your own network too, without a proxy. When you see a jump in the series one day, if the same jump is in the reference series the cause is not on the network side; if not, you can turn your attention to the exit.
The third is measuring the exit itself. Writing down the values you get with ping test before the run turns the later remark "the exit was slow that day" from a guess into data. For the effect of pool logic on long series, the difference between rotating and static proxies is a good starting point.
Exit type and pool: which job suits what?
Make the exit type decision by looking at three criteria: the run's duration, the need for country diversity and the amount of data you will transfer. In a long-running series that stays in one country, the most valuable quality is stability; the address changing on every request does you no good — on the contrary, it distorts the measurement.
If you are going to sample from many countries, pool breadth comes to the fore. Here country and city diversity on the residential proxy side becomes decisive. On the other hand, charging by data transferred grows the cost quickly in repeated runs; keeping the query list narrow is the most effective way to save.
If speed and stability are the priority, datacenter proxy or, hosted on a provider network, ISP proxy is a better fit. The difference between these two options shows in network classification: datacenter blocks are classified more clearly, while ISP blocks sit on the subscriber network.
Whichever type you choose, ask how many people the exit is shared with. In runs working from a heavily shared address, the likelihood of seeing a verification screen and of slowdowns increases; this is a variable independent of type and is often the real reason for the price difference.
Also factor in the cost of turning back when deciding. A series in which you change the exit type midway becomes incomparable with the earlier part from that point on; in practice you end up with two separate series. Test the type choice with a small trial set before starting the run, and only start the real series once the decision is settled.
DIAGRAMRelative suitability of exit types by measurement criteria
You can scroll the diagram horizontally to inspect it
The values are not measurements but representative scores showing the weight of the three criteria relative to each other.
Setup, leak verification and a symptom table
The first decision in setup is scope. A separate browser profile routes only that profile and does not disrupt your daily work; a system-wide setting covers every application. In runs driven by scripts, limiting the routing to a single process is the most controllable approach. The format of the access details is the same everywhere: proxy.example.com, port 8080, username username, password password.
Run three checks after setup. DNS leak test shows where your name resolution is done, the WebRTC leak test shows whether the browser exposes your real address, and the anonymity test shows the headers the proxy adds. Run all three with the proxy on and off and compare.
Symptom
Possible cause
Check step
Results do not match the expected country
Name resolution is done locally or the exit is different
Verify the resolution mode and the exit country
The country changed mid-run
The pool switched to a new address
Extend the sticky window or use a fixed exit
The page comes back empty
The request was recorded before it completed
Add a load-completion check
Verification screens are becoming more frequent
The pace is high or the exit is heavily shared
Widen the interval, try a less shared exit
A certificate warning appears
Your traffic may be being decrypted at an intermediary point
Do not click through the warning on an exit you do not know
Be clear about latency expectations too: a proxy adds a hop, total time increases in most setups, and it does not lower the ping value. In measurement work, the aim is not for the time to get shorter but for it to stay stable between runs.
Common questions about Yep and proxies
01How much do Yep results change with a proxy?
The change depends on the query. For technical definition searches you get almost the same list from two different exits; the difference becomes pronounced for local services, current events and country-dependent topics. The right approach is to determine first, on a small set, which queries are sensitive.
02If there is no personalisation, why should I care about profile cleanliness?
The absence of an individual profile does not mean everything accompanying the request is neutral. Preferences held in the browser, the interface language and the region selection all carry into the output. Opening a clean profile for each country keeps these residues out of the measurement.
03Are the language setting and the exit country the same thing?
No, they are independent inputs. Taking a measurement with a Turkish interface from another country's exit is a valid setup. What matters is that only one of the two changes over the course of a run; if both change, the source of the difference becomes unclear.
04Will I see commercial placements the same way in every country?
Do not assume so. The commercial surface may not be equally mature in every region. In measurement, first record whether the placement exists in that country as "present / absent", then compare the content. The absence of a placement is data too.
05Can I also write the price on the page into the measurement series?
Do not write it into the same series. The result list is the engine's decision; the price and currency on the store page are the target site's decision. Keeping the two in separate tables with separate timestamps prevents you from drawing the wrong conclusion later.
06I saw a jump in a long series — where should I look first?
Look at the reference series first: if you also run the same query set regularly without a proxy and the jump appears there as well, the cause is not on the network side. If not, check the exit label, the sticky window and that day's ping record.
07Which error occurs at which hop?
407 points to authentication between the proxy and the client, and the target was never reached. A timeout usually occurs on the leg between the proxy and the target. The engine's own error page, on the other hand, shows that the chain was traversed to the end and that the problem is in the request, not the network.