Some Handy Aggregated Reference Info for ePN Affiliates and eBay Developers
(Unfortunately, I don't update this website as often as I would like. So, please be prepared for some of the info below to be outdated. Thanks for your understanding.)
A Smattering of eBay URL Syntax
eBay Search URLs
You can build an eBay search URL pretty easily by assembling a base URL and multiple URL query string parameters. The result is a URL that delivers on-site search results per your request and eBay's back-end search processing algorithms.
I don't think eBay's search URL parameters are officially documented anywhere, but below are a handful of 'em I've collected in my notes and used. This is certainly a non-exhaustive list, as there are many more, including many redundant ones too.
I learned many of these through trial-and-error, plucking params out of live eBay searches and tinkering with them. It's certainly possible that some of these params don't always work, only used to work in earlier eBay search frameworks, or work only in certain scenarios. Be sure to test your URL before going live.
Start with this base URL (adapted to whichever eBay country-site you are targeting): http://www.ebay.com/sch/_______ . Then append the respective parameters, taking into account typical syntax requirements such as URL encoding when necessary (%20 for space) and ? or & as needed. Most of these params infer default values, so you can use only the ones you need in your final URL. I've inserted some example values below.
Base URL: http://www.ebay.com/sch/
&_nkw=Starbucks%20card : Keywords
&_sacat=267 : Category ID
&_pgn=1 : Page Number
&_ipg=200 : Items Per Page (200,100,50,25,10,5)
&_fcid=1-224 : country code/number for only items listed in a certain country (thanks to eBay user 'h0bojoe' for this tip)
RSS Feed: You can often convert a search URL into an RSS feed (maybe just first 100 items) by appending a parameter and adjusting the URL path. See last entry above.
You'll need to take care of affiliatizing/roverizing your final search link, if that's important to you.
While you should be able to use other eBay country-sites ( eBay UK, for example: http://www.ebay.co.uk/sch/ ... ), I would guess that not all country-sites support all params.
eBay Item URLs
There are numerous historical syntaxes that eBay has used over the years for specifying an item's View Item page. Here are a few of them that I'm aware of. (They are for desktop pages, not mobile. They're also bereft of extraneous SEO keyword components.)
As usual, feel free to adjust the eBay hostname for other international properties. However, some of the smaller eBay sites may not be as compatible with each of these URLs, so be sure to test. I tend to prefer the first 1 or 2 below, as they have some longevity/history on eBay and were the most compatible with international sites the last time I checked.
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