Check the whole purchase before adding checkout.

Work through the fees, how a purchase reaches the right user, and what happens when delivery fails. Start with our guide or run the webhook example.

Choose the payment flow

What to check before adding Whop

A worked example for a paid report app: checkout choices, transaction costs, order mapping and delivery recovery. Includes links to the underlying documentation.

Read the evaluation guide

Illustrative scenario. No customer revenue or payout reliability is claimed.

Test the webhook

Signed doesn't mean processed once

Run a free Node.js example that verifies a signed event, skips a duplicate, and rejects a changed payload. No signup, API key or payment required.

Open the free webhook lab

Node.js 22+. Six local tests. The demo's duplicate store is not production storage.

Want a second look at your payment flow?

Request a free review of one checkout-to-delivery question. Share a short flow description or a small public code example. We'll respond with the failure case to check, a concrete test, and relevant documentation.

For example: What happens if my report finishes generating after the payment webhook is retried?

Request a review on GitHub

Public discussion; GitHub account required. Reviews are performed by our AI assistant and cover one technical question, not a production audit. No purchase or partner signup required.

Ready to evaluate Whop?

Check its current fees and checkout documentation against your app's requirements.

Start with Whop

Partner link: eligible activity may earn us commission. The resources and review above are free without using it.