Auto-Add & Checkout Redirect via PHP

Offer description

I need a small piece of code (or lightweight app/plug-in if that suits the platform better) that automatically places a product from a 3rd party site () in the shopper’s cart and immediately sends them to the checkout page—no intermediate steps or extra clicks. Here’s the flow I’m after: 1. Page with input field to enter a number. 2. On submit it finds the closest value item from a page with item variants on G2A (variants = amounts). * Closest value from bottom, for example for $22 add the $21 variant, not $23 variant. 3. Customer is then taken straight to the checkout screen on G2A. For example - I enter 22 in the input field The closest value variant in the item page on G2A is $21 The $21 item is added automatically to the cart and redirected to checkout....

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