NX-API Sandbox is an interactive development utility that allows an administrator to enter familiar NX-OS CLI commands and view the corresponding API request and response structures. It can generate example code and display message formats such as XML and JSON, making it appropriate for translating traditional CLI operations into programmatic requests. JSON-RPC is an API message protocol, not the interactive translation and code-generation utility requested. Guest Shell supplies a Linux container in which scripts and tools can run, but it does not itself translate CLI commands into XML or JSON requests. Open NX-OS describes the broader programmability architecture and open interfaces available in NX-OS rather than a specific translation utility. Therefore, NX-API Sandbox is the tool that directly satisfies both the CLI translation and code-generation requirements on the Nexus platform.