Integrations
Choose an accounting source or payment destination and follow its documentation in implementation order.
On this page
Choose the provider you are implementing
Accounting source
QuickBooks Online
Connect and sync invoice records that remain authoritative for commercial transaction facts.
Payment destination
Stripe
Prepare PaymentIntent fields and report actual Stripe outcomes from your merchant backend.
Payment destination
Square
Prepare a Square Order fragment and report actual Payment outcomes from your merchant backend.
Source and payment roles stay separate
| Role | Current provider | Responsibility |
|---|---|---|
| Accounting source | QuickBooks Online | Authoritative invoice identity, line items, quantities, tax, shipping, discounts, balances, and source revisions. |
| Payment destination | Stripe | Merchant-owned PaymentIntent execution and provider events; Carden prepares fields and accepts normalized reports. |
| Payment destination | Square | Merchant-owned Order and Payment execution and provider events; Carden prepares Order context and accepts normalized reports. |
A provider ID, invoice ID, payment ID, or dashboard selection never expands authorization. Links between providers must stay inside one merchant and environment and must be explicitly enabled.