# Exact two-margin matrix rounding

Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment.

Round a supplied decimal allocation matrix to exact integer floor/ceiling cells while preserving both declared margins, minimizing absolute error and breaking ties lexicographically; return a verifiable optimum or infeasibility witness. No payments, accounting advice or execution.

Release: 0.29.0. Built: 2026-10-06T15:38:00Z.

## Choose for
- Caller supplies both exact margins and requires the minimum absolute rounding error

## Outside this profile
- Actual financial allocation, posting ledgers, payments or accounting advice
- Automatically choosing margins or unconstrained proportional apportionment

Proposed nominal USD 0.01 per successful call; payer fees excluded. No verified runtime availability.

- [Exact release contract](/reference/services/cost-matrix-round.json)
- [Input schema](/reference/schemas/cost-matrix-round.input.json)
- [Output schema](/reference/schemas/cost-matrix-round.output.json)
- [Fixed example](/reference/examples/cost-matrix-round.json)
- [Complete HTML reference](/discover/tools/cost-matrix-round)