Interfacing Protocols and APIs

Updates for this SFS are pending because supporting source research is incomplete. Existing catalog content is shown.

This set covers API contracts, message protocols such as MQTT, interface authentication and authorization, input validation, error handling, and control of exchanged data. It includes integration tests and mock interfaces where they support verification. Questions should identify the communicating parties, allowed operations, and evidence that the interface enforces its stated conditions. Network transport restrictions belong to SFS 5, identity management to SFS 3, and data lifecycle rules to SFS 4.

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