Add Stripe to an AI-Built App (Floot, Base44, Hercules, Replit)

Estimated reading time: 6 minutes. Last verified: August 2026.

Key takeaways

• Use Stripe test mode until a real purchase succeeds end to end.
• Hercules, Base44, Floot, and Replit all claim payments/integrations; the prompts differ, the checklist does not.
• Never put secret keys in client-visible prompts or public files.

Table of contents

1. Prep
2. Build steps
3. Go-live checklist
4. FAQ

Prep

1. Create a Stripe account and switch to test mode.
2. Decide Checkout Session vs Customer Portal subscriptions.
3. Write one sentence: "Users pay $X/month for plan Y and then unlock feature Z."

Build steps

1. In your builder, prompt: create a Pricing page, Stripe Checkout for plan Y, webhook to mark the user paid, and a gated route for feature Z.
2. Store the Stripe secret in the platform's secret manager, not in chat history you will paste around.
3. Implement success and cancel URLs on your domain.
4. Trigger a test payment with Stripe test cards.
5. Confirm webhook delivery and that the user role flips to paid.
6. Only then switch keys to live mode.

Go-live checklist

• Tax/VAT settings reviewed
• Customer emails from Stripe enabled
• Refund path documented
• Failed payment dunning decided
• Logging for webhook failures

FAQ

Which builder is best for Stripe?

Whichever already has a maintained Stripe integration doc. Replit and Base44 are commonly used; Hercules and Floot also advertise payments. Follow the vendor's current Stripe guide over generic prompts.

Can the AI "just handle Stripe"?

It can scaffold. You still verify webhooks and entitlements yourself.