External API Monitoring

[Sohel_Rashid]

Hi Team,

We are currently using the Dynatrace Managed environment in the bank, and the team would like to enable monitoring for external APIs to gain better visibility into third-party dependencies and outgoing API calls.

Could you please share the best practices or recommended approach for monitoring external APIs in Dynatrace Managed? It would be helpful if you could also provide any pro tips, configuration recommendations, or prerequisites to ensure effective monitoring and alerting. I have the API list.

[MaximilianoML]

Hello @Sohel_Rashid,

For Dynatrace Managed, the strongest setup is usually a two-layer approach... use OneAgent passive monitoring for the real outbound calls your applications are already making, and use Synthetic HTTP monitors for active availability/performance checks against the external APIs you care about most. Dynatrace already captures outgoing requests from monitored server-side services and groups many of them under Requests to public networks; important third-party domains can then be promoted to standalone monitored services. HTTP monitors in Managed can run from cluster-wide locations, and private locations can be added with Synthetic-enabled ActiveGate when you need monitoring from inside your network 😀

A few practical tips:

• Use passive monitoring for real production visibility.
• Use Synthetic HTTP monitors for proactive checks and alerting.
• Focus first on the APIs that are truly business-critical, instead of monitoring every outbound call with the same priority.
• Add request attributes if you need to distinguish specific operations, paths, or tenants inside the same external domain.
• Tune alerting carefully to avoid noise, ideally using problem-based notifications or workflows.
• Tag APIs by criticality, owner, provider, and environment so dashboards and routing stay organized.