Describe available sandboxes for your API. 50-60 chars

> Developer Sandboxes provide infrastructure for developers at zero-cost to explore an API. They are particularly useful to avoid the more complex environment setup and/or devices required to explore an API. Developer sandboxes help to encourage developer adoption of APIs. Additional details and resources are available in the section titled "API Adoption" in the API Style Guide.

> Provide details about what developer sandboxes are, what is available, and how to get started. Below is an example from the ACI docs:

ACI Sandboxes

Don't have access to an ACI environment? We've got you covered.

The DevNet Sandboxes provide developers with zero-cost, easy access to Cisco Application Policy Infrastructure Controller (APIC) to develop and run code against 24x7. Make ACI API requests in the following development environments or view all Data Center Sandboxes in the Sandbox Catalog.

/images/aci-reserve.png ACI Simulator https://devnetsandbox.cisco.com/RM/Diagram/Index/661da090-c16c-4b8c-95db-1194e461964c?diagramType=Topology _blank RESERVATION SANDBOX The ACI & Kubernetes Sandbox, running with a Kubernetes cluster, automates network infrastructure deployment, scaling, and operations of application containers across clusters of hosts, providing container-centric infrastructure. Each instance of this Sandbox includes everything needed to deploy a Kubernetes Cluster using the Cisco ACI CNI Plug-In allowing network, application, and security teams to deploy policies to micro service applications and containers consistent with other systems. Try it out /images/aci-always.png ACI Simulator https://devnetsandbox.cisco.com/RM/Diagram/Index/5a229a7c-95d5-4cfd-a651-5ee9bc1b30e2?diagramType=Topology _blank ALWAYS-ON SANDBOX Make APIC API requests in the ACI Sandbox lab at any time or day. No reservation required for this shared ACI server instance. This Sandbox includes APIC Simulator version 4.1 with virtual N9K-C9336PX, and N9K-C9508. Try it out /images/aci-mso.png Cisco ACI Multi-Site Orchestrator https://devnetsandbox.cisco.com/RM/Diagram/Index/4cca5284-7e96-49b8-8b19-b4848c1d4315?diagramType=Topology _blank RESERVATION SANDBOX Reserve this Sandbox up to 5 consecutive days to make APIC API requests in this ACI Sandbox lab. Reservation is required. This Sandbox includes APIC Simulator version 3.0.3i with virtual N9K-C9336PX, and N9K-C9508. Try it out