Customer API

Overview

A customer API lets authorized software create, retrieve, update, or manage customer records and related settings through a controlled programmatic interface. It helps applications keep customer context consistent across commerce, billing, support, and payment workflows. Customer data is sensitive and must be scoped by tenant, role, and purpose. Integrators should map local and provider identifiers explicitly and reconcile records that fail or conflict during synchronization.

For Customer API, assertions should verify final provider and business state, not only an HTTP status or locally mocked response. A customer API exposes operations for customer identities, profiles, preferences, addresses, payment relationships, verification status, or account settings. Robust designs include strong authorization, validation, audit history, pagination, concurrency controls, and lifecycle rules for deletion or retention. For Customer API, the application should preserve a correlation path from request construction through response, asynchronous completion, and final business state.

For Customer API, developers should retain one correlation path across these stages because an immediate response can differ from later provider, blockchain, payment, accounting, or settlement state. APIs should distinguish absent fields from requests to clear a value and should avoid returning more personal data than the caller requires. A successful transport result from Customer API should not be interpreted beyond the exact API state documented by the provider.

Identifiers should be stable and non-guessable where exposed.

Data handled by Customer API should use documented types, units, timestamp rules, nullable fields, and enum behavior to prevent silent interpretation errors.

The Customer API contract should define identifiers, validation, authorization, status semantics, errors, limits, and version behavior at the same boundary.