When I worked in a LARGE eCommerce company maybe 6 years ago, everything was driven by CSV files dropped in an FTP folder. There were a few exceptions where companies had API's. Still even those were GET requests initiated by us, and we didn't want to overload them so it wasn't super up-to-date, but that was the norm. I tried to break out to do my own thing, and I realized those automated systems were only for the big guys.
If you were small, you don't even get the privlidge of an inventory file. Vendors don't have time to deal with small guys, and it can be super difficult to get started.
Playing with crypto, and NFT's, I realized this was what I wish was the norm. The indexers were close to real-time. The chain I was using (AVAX) had a finality of 4 seconds, and gas is cents.
What i'm going to describe isn't a solution to a problem the big guys have. They had enough sway with their vendors to get good systems. But for small guys like me, open access to automated systems would have been a god send. My dream system would be something like this:
Think of this happening in a subnet (an app specific blockchain that doesn't share space with other apps, so scale is not affected by other apps)
1. A Trusted supplier mints a NFT for each of their SKU's (yeah trust and crypto don't go together ideologically, that's a purity problem crypto needs to get over itself, sometimes trust is useful... if you try to build the whole thing trustless, it's not better than traditional systems).
2. These NFT's are listed in any NFT marketplace that cares to list them. (with subnet-to-subnet messaging, you don't need to duplicate the contracts... so shouldn't have major scale issue. This is a brand new feature, so i'm not super sure though.)
3. I as a small scale vendor list a sku on my normal site. I can take payment as normal, but then I can call the NFT's index to get real-time inventory (even though I have no preexisting relationship with the vendor)
4. I get an order, I buy the NFT off the marketplace, and burn the NFT. My customers details are provided in the NFT burn contract. An app specific precompile let's me transmit those details to the vendor without making it public on the block chain (with proof it received it correctly).
5. After the NFT is burned, an ERC20 token is dropped in my stores wallet. After I get enough of these, I can trade them in for a volme rebate. This let's the small vendors get access to effectively what is a volume discount.
I suppose this could be a SaSS app, but there's a bunch of side benefits to crypto, such as defi, tooling etc. But mainly vendors can customize their own terms if they own the full contract chain.