API Management
API Management within SAP BTP Integration Suite enables organizations to design, secure, publish, monitor, and monetize APIs that expose backend systems (S/4HANA, ECC, third-party, or cloud services) to internal and external consumers. This topic covers the business rationale for API-led integration, core architectural concepts such as API proxies and policies, developer portal usage, security enforcement, and runtime traffic management across Cloud Foundry and Kyma-based landscapes.
Overview
API Management within SAP BTP Integration Suite enables organizations to design, secure, publish, monitor, and monetize APIs that expose backend systems (S/4HANA, ECC, third-party, or cloud services) to internal and external consumers. This topic covers the business rationale for API-led integration, core architectural concepts such as API proxies and policies, developer portal usage, security enforcement, and runtime traffic management across Cloud Foundry and Kyma-based landscapes.
Lessons in this topic
- BTP API Management Part 1: What API Management DoesSAP API Management (in Integration Suite) puts a managed layer in front of your APIs: API providers and proxies, policies for security and traffic, products that bundle APIs for consumers, a developer portal for onboarding, and analytics — so back ends stay protected and APIs become reusable products.
- BTP API Management Part 2: Proxies, Flows and PoliciesBuild API proxies correctly: proxy and target endpoints, the flow model (PreFlow, conditional flows, PostFlow) for request and response, where policies attach, key value maps for configuration, and deploying/updating proxies safely.
- BTP API Management Part 3: Designing Policy ChainsCombine policies into a sensible chain: authentication first, then spike arrest and quota, then threat protection and mediation, caching where useful, and error handling — with reasons for the order and how to test the chain.
- BTP API Management Part 4: Security — API Keys, OAuth 2.0, JWT and mTLSSecure APIs properly: API keys for identification (not strong authentication), OAuth 2.0 client credentials and token verification, JWT verification against an identity provider (issuer, audience, signature), mutual TLS for partner-level trust, and securing the proxy-to-back-end leg.
- BTP API Management Part 5: Rate Limiting, Quotas, Spike Arrest and Threat ProtectionProtect back ends and fair usage: spike arrest for bursts, quotas per application or product tier, concurrent rate limits, payload threat protection (JSON/XML), regular expression protection, and sizing limits based on back-end capacity and business tiers.
- BTP API Management Part 6: Product Lifecycle, Versioning, Analytics and Developer PortalRun APIs as products: versioning strategy (URI versions), deprecation and retirement with analytics-driven communication, products and applications in the developer portal, API documentation, analytics for usage and errors, and governance roles.
Interview questions covered
- What are the core concepts of API Management, and how would you explain them clearly in an SAP interview?
- How would you apply API Management in a real SAP project? Walk through the design or implementation approach.
- A production issue is reported in API Management. 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 Management?
- Suppose you inherit an existing API Management solution. How would you review it before making a change?
- Define API security for public, partner and internal-user APIs in API Management.
- How do you manage the lifecycle of APIs as products, including retiring old versions?
- A retail company exposes S/4 services directly to partners and S/4 suffers during peaks. Explain API Management and your approach.
- Build an API proxy for an S/4 OData service with security and back-end credentials.
- Design a standard policy chain for public and partner APIs.
- A mobile launch overloads the back end through API Management. How do you design traffic protection?