API security has never been more critical for teams building and running integrations in Azure. Every exposed endpoint, every poorly managed secret, every missing policy can turn into a breach. Azure’s integration capabilities—Logic Apps, API Management, Function Apps, Event Grid—are powerful. But power without precise controls is risk.
The first step is to treat every Azure API integration as a potential attack surface. Inventory all APIs in use. Map all connections between services. Identify who has access and from where. In Azure, this means checking API Management instances for unused endpoints, verifying Function Apps aren’t exposing unnecessary HTTP triggers, and confirming Logic Apps use secure inbound and outbound connections.
Authentication and authorization must be non-negotiable. Use Azure Active Directory for identity management, enforce OAuth 2.0, and apply granular role-based access control. Avoid hardcoded credentials—store and rotate all secrets in Azure Key Vault. For multi-tenant or external-facing APIs, apply rate limiting and throttling in API Management to prevent abuse.
Encryption must extend beyond storage. Enforce HTTPS for every API endpoint, configure TLS 1.2 or higher, and ensure data is encrypted in transit and at rest. Cross-check the configuration with Azure Security Center recommendations.