Billing
Billing — 7 endpoints.
Get upcoming-charge preview
GET /billing/upcoming-charge
Get billing invoices
GET /billing/invoices
Get invoice details
GET /billing/invoices/invoiceId
Download invoice PDF
GET /billing/invoices/invoiceId/download
Get billing status
GET /billing/status/businessId
Get trial info
GET /billing/trial/businessId
Get grace period info
GET /billing/grace-period/businessId

