For products already online

Add Stripe Checkout to your existing product.

BitterCheckout connects your buy button to Stripe Checkout. It hosts the checkout configuration and widget, creates the session, and sends your product a signed callback when Stripe confirms payment.

Your product keeps control of access and fulfillment.

Set up checkoutSee the setup

Uses your Stripe account. Verify the callback before accepting live payments.

How it works

From buy button to fulfillment.

BitterCheckout handles the narrow middle of the payment path. You choose the offer, Stripe processes the payment, and your product decides what the buyer receives.

  1. 01

    Define what you sell

    Name the product, add credit packs or plans, allow the site that will host the widget, and set the callback URL your product controls.

  2. 02

    Connect your Stripe account

    Use the Stripe account that should receive payment. Stripe remains the payment processor and payout destination.

  3. 03

    Add the widget

    Paste one script and mark the buy button. BitterCheckout presents the offer and asks Stripe to create hosted Checkout.

  4. 04

    Test fulfillment

    Verify the signed completion callback and confirm that your product grants the correct access, credits, file, or subscription before launch.

Example embedSeller page
<!-- Add to the product page -->
<script src="https://bittercheckout.com/widget.js"
  data-site="your-product"></script>

<button data-checkout-open>Buy credits</button>

Who owns what

Payment is only one part of the purchase.

The boundaries stay visible so a checkout shortcut does not quietly take control of customer access or fulfillment.

Stripe processes payment.

Card data, hosted Checkout, available payment methods, processor receipts, disputes, and payouts stay with Stripe and your Stripe account.

BitterCheckout handles the checkout handoff.

It stores the checkout config, serves the widget, creates the Stripe Checkout session, receives Stripe’s completion webhook, and sends a signed callback.

Your product decides what happens next.

Your app remains responsible for customer access, credits, subscriptions, files, delivery, refund policy, and support decisions.

Good fit

When it saves real work.

Credit packs, small subscriptions, paid tools, gated downloads, and existing sites that need a clean route into Stripe Checkout.

Keep in your product

What payment unlocks.

BitterCheckout does not become the customer, credit, entitlement, or accounting record. Your product still grants and revokes access and handles fulfillment.

Before launch

Questions before the first payment.

Can I accept live payments today?

You can create a config for your Stripe account and embed the widget. Treat a property as live only after your Stripe keys, checkout session, redirect URL, and fulfillment callback have been verified for that property.

Do I need a backend?

You do not need to build the checkout-session endpoint. Your product still needs a callback or fulfillment path if payment unlocks credits, access, files, subscriptions, or other value.

Which payment methods appear?

Stripe Checkout decides the available payment methods for the buyer, browser, region, and Stripe account settings. BitterCheckout routes the buyer into that hosted Stripe flow.

Where do buyers get support?

Your product owns buyer support and fulfillment decisions. BitterDesk is the setup support route for embed behavior, redirects, and callback wiring.

From Bitter

One narrow product in a wider set.

BitterCheckout works on its own. Use the rest of Bitter only when shared accounts, setup support, or product analytics make the product better.