Sending buyer a product key on eBay - notifications

I want to sell a product on eBay and have an active user account.
I have a product almost ready to go. The product is an installable but requires a product key that will be sent to the buyers after a successful purchase. How do I go about setting this up as, I can create a database of product keys but after that I am kind of lost.
Any ideas anyone? 
(A quick look just now mentioned the eBay API, sounds like a Christmas present to me , I shall check it out )

looks like paypal instant notification !
Voulaino!

Related

Post an order to Shopify for unknown user

Is there a way to post an order, including payment information and shipping information, to Shopify for a new user?
For example, user ABC wants to purchase a product through my website (that is not a shopify website), and I gather all of the information required to make the purchase, including shipping address, credit card, etc. User ABC is not known to Spotify. Is there a way for me to use the Shopify API to process this transaction, including payment processing and everything else?
Shopify has a sales channel called Buy Button. You can use that for your purpose.
Buy Button
Creating a Buy Botton
Adding a Buy Button

Shopify API - Payments

I have been reviewing the API documentation for Shopify and am trying to figure out if the cost of an item selected from the 'Store' can be passed in a Get command back to a different website so a different website can charge for the Item along with other charges from a website ...and then once the payment goes through on the website, send a POST to shopify that the sale was complete and proceed with fulfilling the order?
Our software is newspaper software so we provide newspapers with subscriber web portals were customers can sign up and pay for a newspaper subscription.
We would like to offer the ability to add Single Sales items to what a customer purchases and we want to be able to do it in one payment transaction
I have reviewed the various Shopify API documentation but it is not clear if the API supports getting cost info and posting a successful charge back to Shopify to complete the fulfillment step. We are looking to be able to GET the cost for a selected single sale item passed to us from the Shopify API so that we can add it to the Amount we pass to the Payment Gateway we integrate with and when the payment goes through, send Shopify a success on the payment.
The ultimate goal is to have a customer make one payment that can include single sales items as well as a newspaper subscription or day pass.
You should do a POST and create an Order using the Shopify API once (at your side) are sure the payment has gone through.

When will Shopify include customer webhooks?

Does anyone have any idea when/if Shopify will offer 'customers/created', 'customers/updated', and 'customers/delete' webhook events?
It would be great to be able to have our app notified when merchants are making changes to their customer records via their Store admin, or when someone creates a customer account without having completed an order.
They now exist! Check them out at http://api.shopify.com/webhook.html

Why is the eBay FixedPriceTransaction notification going to the buyer when it is a notification for the seller only?

I had recenlty setup the FixedPriceTransaction notification for a client which would send the order related details to the client website in the event of an order on eBay. This has worked fine.
Recently the client logged into his eBay account and bought an item from another seller on eBay and for some reason beyond my understanding the website received the notification for this transaction as well.
My understanding is that the FixedPriceTransaction notification is only sent to the seller when some one buys an item from them on eBay so this should not be sent in the case I have mentioned above.
Can any one point out why the above is happening?
It goes to both. You have to check whether the recipient user ID matches the seller's user ID in order to verify whether you should import that data into your selling application.

Paypal for a buy/sell website

So I'm working on this website where users post their items, other users add some items to their cart and purchase them online.
The flow i was thinking about goes like this:
A merchant posts an item along with their credit cart/ paypal information.
A buyer adds items (from different merchants) to his/her shopping cart and purchases.
The buyer pays by filling a form that includes the payment method fields within the website's layout (no redirection to paypal).
The website will work as a gateway, it will capture the payments from the buyers and pays the merchants accordingly and automatically.
Is this possible using PayPal? if so, what API should I use?
Any input/idea is appreciated...
Thanks,
/t
I have also investigated using PayPal in this way for a site with a similar concept. Unfortunately, PayPal does not allow this. This makes you something known as a Third Party Payment Aggregator which drastically increases the risk associated with providing you a Merchant Account (which is what PayPal is doing). You can read more here.
Though, you could probably do it for a while before PayPal caught on, they could cancel at anytime leaving you high and dry. I recommend investigating Third Party Payment Aggregator solutions (Braintree has something that helps with this).
I guess it is. Use Paypal API
https://cms.paypal.com/us/cgi-bin/?cmd=_render-content&content_ID=developer/howto_api_reference
https://developer.paypal.com/