Bring Secure Access Investigate functions into API-driven security operations with the Small-tier entitlement under Cisco Security EA 3.0. E3S-SA-INVAPIS-LDR provides the subscription component for organizations that need to connect investigation activity with operational systems, security workflows, or internally developed tooling through an API interface. It is a software entitlement, not a physical security appliance or network component. The Investigate API designation matters when an environment needs programmatic access rather than an analyst working solely through a browser interface. API access can support workflows that collect, enrich, correlate, or route investigation information across security processes. The Small tier identifies the entitlement size selected for the deployment, allowing teams to align the subscription with the intended scope of API-based investigation activity. This item belongs to the Cisco Security EA 3.0 programme and specifically addresses Secure Access Investigate API access. Its distinguishing characteristics are the Secure Access service alignment, Investigate API function, and Small entitlement tier. Select it where those three attributes match the existing Cisco security subscription architecture and the required investigation workflow.