billing_id. Organizations that share the same billing_id are rolled up as one line on your OpenCard invoice — not billed as separate invoices per organization.
What it represents
How it fits
Common setups
Key fields
Create and link
"billing_id": 1 (or whichever profile applies). Multiple organizations with the same billing_id share one line on your OpenCard invoice.
Product flags are what the client chooses in onboarding (“transactions” vs optional enrichment). → Customer onboarding
Create billing during client setup, together with the TPA. An optional ocTPA plugin collects the same fields — you still POST this API.

