Model Serving · Interface
Hosted Provider Inference API
InterfaceModel ServingModelsarc:HostedProviderInferenceAPI
A cloud-hosted model provider's API offering function calling under provider-specific request, response, and schema-dialect conventions.
Responsibility. Provides function-calling inference as an external managed service.
Also known as: Cloud LLM API
Variant of Native Function-Calling API abstract
When to choose. Choose when data residency, security policy, and cost considerations permit sending prompts to a cloud-hosted LLM provider.
Relationships
is invoked by dependency
- Answer Synthesizer abstract Ch6.5
is routed to by dynamic
alternative to variability
Design guidance
- SHOULD NOT assume model behaviour is stable across calls; providers may deploy model updates transparently.
- SHOULD prefer dedicated-throughput capacity over pay-per-token APIs when peak-time queue wait inflates TTFT.
Classification
- Technologies
- OpenAI APIAnthropic Claude APIGoogle Gemini APIAnthropic API
- Quality attributes
- Maintainability (ISO/IEC 25010)
Sources
- Ch2.6: T. Nguyen, "Tool Integration and Function Calling," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 2.6. ISBN: 9798244538229.
- Ch2.9: T. Nguyen, "Streaming and Real-Time Responses," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 2.9. ISBN: 9798244538229.
- Ch6.5: T. Nguyen, "Production RAG Systems," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 6.5. ISBN: 9798244538229.
- Ch8.3: T. Nguyen, "Token Economics and Architecture," in Mastering Agentic AI Systems: Guide for the NVIDIA NCP-AAI Exam, 1st ed. 2026, ch. 8.3. ISBN: 9798244538229.
- Ref7.07: E. Li, V. Bellotti, R. Kraus, and R. Kao, "Build a retrieval-augmented generation (RAG) agent with NVIDIA Nemotron," NVIDIA Technical Blog, Sep. 23, 2025. [Online]. Available: https://developer.nvidia.com/blog/build-a-rag-agent-with-nvidia-nemotron/