APIs & Integration

API-Centric Integration Patterns

Build governed APIs that connect enterprise applications and agent-enabled workflows.

By Rameshkumar Varanganti · Enterprise Integration Lead & Architect · Updated 31 October 2026

2026 update. To expose these APIs to agents see MCP gateway architecture and, on SAP, SAP Integration Suite MCP Gateway.

API-centric integration treats API contracts as a managed interface to business capabilities. Keep externally exposed endpoints stable while internal transformations, orchestration and adapters evolve.

Core elements

Contract-first design and predictable versioning.
OAuth 2.0 or other context-appropriate authentication and scope-based authorization.
Request validation, quotas, throttling and observability.
Idempotency for business operations and deliberate retry behavior.
Event-based processing when synchronous APIs cannot meet latency or reliability requirements.

Example sequence

Consumer → API Gateway → Integration Service → ERP / CRM
                          ↘ Monitoring & Error Handling

For MCP-enabled APIs, apply an explicit tool contract and separate discovery from authorization.

Rameshkumar Varanganti

Enterprise Integration Lead and Architect with 20+ years in SAP integration (BTP Integration Suite, CPI, PI/PO, API Management, Event Mesh). Writes about agentic integration, MCP and AI governance.

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