# Start the Stripe subscription confirmation

If a payment requires confirmation (3dSecure etc), the payment is confirmed in the front end.

Endpoint: POST /blaize/payment/stripe/subscription/confirmation
Version: 2025-07-30
Security: CookieBlaizeSession, JwtQuery, JwtHeaderXBlaizeJwt, JwtHeaderXZephrJwt, JwtBearer, JwtCookie

## Request fields (application/json):

  - `subscriptionId` (string)
    Example: "sub_H8eIeMFwMawg6w"

## Response 200 fields (application/json):

  - `grant_id` (string)
    New grant of product bundle to user
    Example: "aa583cb8-51d1-4bd9-9ec7-3a43796ef8e5"