Bolt·FixpaymentsStripeintermediate

Bolt Stripe Checkout Session Returning 400

Quick Answer

How do I fix Bolt Stripe Checkout Session Returning 400?

Bolt is sending Stripe a malformed Checkout request. The most common causes are the wrong price ID, using subscription mode for a one-time price, or passing relative success and cancel URLs instead of absolute URLs. Start with "Verify the Stripe price ID and mode" before making broader code changes.

Fix signals

What this answers: Why bolt stripe checkout session returning 400 happens and what to change first.
Fastest move: Verify the Stripe price ID and mode
Use this page if: Stripe checkout creation fails with a 400 error

If this keeps happening

Open the next decision, not just the patch

Use these when the current fix is helpful, but the real answer is a better tool choice, a cleaner workflow layer, or a more trustworthy launch path.

Bolt reviews

Open this when the prototype came fast but the rebuild cost is starting to show up in auth, deploy, or state problems.

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Bolt vs v0

Open this when the real decision is whether you still need a browser-first prototype tool or a stronger frontend base.

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Fillout vs Typeform

Open this when forms, onboarding, intake, or checkout are the next workflow layer breaking after the app shell is already in place.

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Tool picker

Open this when the payment problem is really making you question the app stack and workflow choice behind it.

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Lovable reviews

Open this when repeated billing drift makes you question whether the current generated full-stack path is still worth the cleanup cost.

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Quick Fix Summary

Most likely cause	Bolt is sending Stripe a malformed Checkout request. The most common causes are the wrong price ID, using subscription mode for a one-time price, or passing relative success and cancel URLs instead of absolute URLs.
Fastest fix	Verify the Stripe price ID and mode
Use this page if	Stripe checkout creation fails with a 400 error

You're in the right place if...

!Stripe checkout creation fails with a 400 error
!The buy button spins and never redirects
!Stripe logs show an invalid price, mode, or URL

Why this happens

Fix

Verify the Stripe price ID and mode

Check that the price ID exists in the same Stripe mode you are testing and that the Checkout session mode matches the product type.

Make Bolt regenerate the server-side checkout function

Use a precise prompt instead of trying to patch the Stripe call manually.

Copy this prompt

Stripe checkout is returning a 400 error.
Please rebuild the checkout session server function so it:
1. uses the correct Stripe price ID
2. uses mode 'payment' for one-time purchases or 'subscription' for recurring plans
3. sends absolute success and cancel URLs
4. returns the Stripe checkout URL cleanly to the frontend

Check the redirect URLs

Stripe requires absolute URLs in production. Do not send '/success' or '/pricing' by themselves.

success_url: `${process.env.NEXT_PUBLIC_APP_URL}/payment-success?session_id={CHECKOUT_SESSION_ID}`,
cancel_url: `${process.env.NEXT_PUBLIC_APP_URL}/pricing`

Prevent this next time

Keep Stripe price IDs in one configuration file or table. Hardcoding different values in multiple places is the fastest way to create 400 errors.