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API Strategy
API Strategy for SAP landscapes covers how architects decide which integration technologies, governance models, and lifecycle practices to use when exposing and consuming APIs across ECC, S/4HANA (on-premise, private cloud, public cloud) and BTP. It addresses clean core alignment, security, versioning, and long-term maintainability of the integration landscape.
Overview
API Strategy for SAP landscapes covers how architects decide which integration technologies, governance models, and lifecycle practices to use when exposing and consuming APIs across ECC, S/4HANA (on-premise, private cloud, public cloud) and BTP. It addresses clean core alignment, security, versioning, and long-term maintainability of the integration landscape.
Lessons in this topic
- SAP API Strategy Tutorial (Part 1)Introduces the business and technical reasons SAP architects need a deliberate API strategy, and how it differs from ad-hoc point-to-point integration.
- API Types, Patterns and Governance Foundations in SAP (Part 2)Covers the main categories of SAP APIs, common integration patterns, and the governance foundations needed to manage them consistently across a landscape.
- Choosing Integration Patterns: Point-to-Point, API-Led Connectivity and Event-Driven Design (Part 3)Compares point-to-point, API-led (managed API layer) and event-driven integration patterns and gives criteria for choosing between them in an SAP-centric landscape.
- Long-Term API Governance, Cost Control and Roadmap Evolution (Part 4)How to sustain an API strategy over multi-year S/4HANA and BTP evolution: governance operating model, cost accountability, deprecation policy, and roadmap sequencing to avoid API sprawl and technical debt.
- Securing APIs Across a Hybrid SAP Landscape: Authentication, Authorization and Principal Propagation (Part 5)Explains the security decisions an architect must make when exposing SAP APIs across ECC, S/4HANA and BTP, including authentication mechanisms, authorization scoping and principal propagation trade-offs.
Interview questions covered
- What are the core concepts of API Strategy, and how would you explain them clearly in an SAP interview?
- How would you apply API Strategy in a real SAP project? Walk through the design or implementation approach.
- A production issue is reported in API Strategy. What would you check first, and how would you troubleshoot it systematically?
- What are the most important design decisions, trade-offs, and best practices in API Strategy?
- Suppose you inherit an existing API Strategy solution. How would you review it before making a change?
- A project encounters this situation while working on API Types, Patterns and Governance Foundations in SAP: A logistics company had three different teams independently building OData services to expose shipment status, each with slightly different field naming and no shared versioning convention. Walk through how you would analyze the requirement or issue, what you would validate, and how you would test the solution before release.
- Using this SAP project situation — A retail company migrating from ECC to S/4HANA public cloud discovered during the initial assessment that over 40 custom ABAP RFC-based interfaces connected ECC to its warehouse management and e-commerce platforms — explain Why API Strategy Matters in SAP Landscapes. What should happen, which concepts or process steps matter, and what common mistake would you avoid?
- A project encounters this situation while working on Choosing Integration Patterns: Point-to-Point, API-Led Connectivity and Event-Driven Design: An architect reviewing a landscape found that a single material master change in S/4HANA Cloud triggered six separate outbound RFC-style calls maintained by different teams, each built as point-to-point over two years as new consumers appeared. Walk through how you would analyze the requirement or issue, what you would validate, and how you would test the solution before release.
- You are the senior consultant/architect responsible for Securing APIs Across a Hybrid SAP Landscape: Authentication, Authorization and Principal Propagation. The project situation is: During a security review before go-live of a partner-facing order status API, the review found that all calls used a single technical service user mapped to full authorization in S/4HANA, regardless of which partner or end user triggered the request. How would you assess the design, identify the highest-risk failure modes, and define the evidence required before approving it for production?
- Using this SAP project situation — Three years after an S/4HANA private cloud go-live, an enterprise architecture review found over 40 custom APIs registered, several duplicating the same customer master exposure with slightly different field sets built by different project teams under delivery pressure — explain Long-Term API Governance, Cost Control and Roadmap Evolution. What should happen, which concepts or process steps matter, and what common mistake would you avoid?