#phezyn_api
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- phezyn_best-practices, 1 day ago, 17 messages
spice lynx
For dynamic / adhoc price, line_items.price_data hash can be used: https://docs.stripe.com/api/checkout/sessions/create?api-version=2025-05-28.basil#create_checkout_session-line_items-price_data
You can set the amount and interval inline in the Checkout Session creation request.
upbeat warren
Yeah that's already working properly. Now I'm trying to enable a user to update an existing subscription
I want to overwrite their existing subscription amount with a new amount, is that possible?
spice lynx
You can use Update Subscription API to update a price: https://docs.stripe.com/billing/subscriptions/change-price#changing
The only difference here is to update using items.price_data instead of items.price to create a new adhoc price on the new amount on existing subscription item ID.
upbeat warren
And this works fine if the subscription is going to a connected account?
spice lynx
Yes! Subscription uses application_fee_percent if you're collecting a fee from the connected account since it goes by percentage instead of a fixed amount: https://docs.stripe.com/api/subscriptions/update#update_subscription-application_fee_percent