Not entirely sure if this is the right place for this question, but here goes.
I have tried getting in touch with the UK NUS people, but so far had no response, to the question of whether there any web services available to validate a UK NUS (National union of students) discount card.
I think these are 18 digit codes, but don't even know how to broadly parse them as I've no idea what they're based on.
I know Topshop, amongst other businesses offer this on checkout from their site, applying the discount into the cart process, which we'd also like to do... It's just I can't find anything at all on this.
Feel free to LMGTFY if I've missed some search term that points directly at the relevant information.
EDIT It seems the topshop site, and a few others are actually validating against a third party company https://www.myunidays.com/ . I would have thought this could be a fairly lucrative business for the NUS to get into. Feed subscription to partnered businesses would be a real money spinner in my opinion. Guess it's either the third party route then, or wait until hell freezes over.