An engineer develops a framework for automatic repetitive tasks needed to manage a Cisco Nexus 9000 Series Switch. The engineer plans to use a programmatic interface and must keep these considerations

SNMPv3 supports authentication and encryption but is primarily a monitoring protocol with limited programmatic configuration capabilities, and its data format (ASN.1) is not XML or JSON.

gRPC is a high-performance RPC framework that uses HTTP/2 for transport and typically Protocol Buffers for message serialization, which does not align with the requirement for XML or JSON format familiarity.

RESTCONF is a RESTful protocol for network device configuration that supports HTTP(S) and XML/JSON. While it meets several criteria, NX-API is Cisco's native API for Nexus OS, offering potentially broader and more optimized access to Nexus features than a generic RESTCONF implementation.

Cisco NX-API is a purpose-built web-based API for managing Cisco Nexus switches that natively supports HTTP(S) for transport, requires authentication for secure operations, and can encode messages in both XML and JSON formats. This solution directly satisfies all the customer's requirements for programmatic automation and ease of parsing by the automation team.