Reconciliation API

Overview

Reconciliation API is an API that exposes records, identifiers, statuses, balances, fees, or settlement data needed to compare payment activity across operational and accounting systems. It supplies reconciliation evidence but does not replace the reconciliation rules, tolerances, ownership, and exception-resolution process.

The principal risks include missing pages, mutable historical records, inconsistent time zones, rounded amounts, duplicate rows, unavailable source systems, and consumers treating an incomplete query as a complete accounting population. A successful transport result from Reconciliation API should not be interpreted beyond the exact API state documented by the provider.

A production implementation should provide stable identifiers, filtering and pagination, immutable timestamps, clear currency and amount semantics, status history, access control, export completeness, and deterministic retry behavior.

Useful measures include record completeness, API latency and errors, unmatched items, duplicate records, pagination failures, data freshness, and time to close reconciliation exceptions. Reconciliation API is closely connected to Payment-to-Ledger Reconciliation, Payment API Pagination, and Payment API Filtering. Changes to Reconciliation API should be checked against older clients, stored payloads, enum growth, default behavior, and retry assumptions.

The Reconciliation API owner should publish stable error semantics and guidance on whether correction, retry, status lookup, or escalation is appropriate. Data handled by Reconciliation API should use documented types, units, timestamp rules, nullable fields, and enum behavior to prevent silent interpretation errors. The Reconciliation API contract should define identifiers, validation, authorization, status semantics, errors, limits, and version behavior at the same boundary.

Observability for Reconciliation API should record operation, version, principal, request ID, latency, retry count, error code, and final state without exposing secrets.