curl --request POST \
  --url https://api.getovra.com/billing/fund \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": 5002.5
}
'

{
  "success": true,
  "funded": 123,
  "stripePaymentIntentId": "<string>"
}