Integration Overview
How Centsless fits into an existing point-of-sale architecture, and what integrating it requires.
POS and Merchant Portals Now Live
Explore our demo dashboards to see how Centsless compliance infrastructure works from both the POS vendor and merchant perspective.
What Centsless Is, Architecturally
A rounding decision layer, not a ledger system.
Stateless Middleware
An API-driven layer that sits between the point of sale and the ledger. It holds no transaction state of its own.
Does Not Alter the Ledger
Centsless returns a rounding decision. It does not write to, reconcile, or modify the primary ledger record.
Module-level detail is documented on the platform page.
Integration Constraints
The behaviours an engineer needs in order to evaluate fit.
Cash-Only Rounding
Rounding applies to cash tender only. Card, EBT, and digital payments pass through unmodified. EBT tender is excluded from rounding, a behaviour designed against 7 CFR 278.2(b).
Reversible Operations
Every rounding operation is reversible, and refund normalization applies symmetric treatment in the opposite direction.
No Lock-In, No Tender Interference
No proprietary data store is required, and tender selection at the register is untouched.
Deterministic Outputs
Identical inputs produce identical outputs. Integer-cent arithmetic, no floating-point drift.
What the Integration Requires
- Integrate rounding logic for all cash transaction types
- Store both exact and rounded amounts in transaction records
- Update receipt templates to display dual totals
- Add merchant-level enable/disable configuration
- Implement logging for audit and compliance review
- Link audit records to the record before them so the log re-verifies end to end
Available on Request
Reference material and sandbox credentials are provisioned on request rather than published openly, so that access to the sandbox environment stays controlled.
API Reference
Endpoint reference and integration guide for platform engineering teams.
Sandbox Access
A keyed sandbox environment for testing rounding, tender, and refund flows.