Definition
In AI systems, REST is the architectural pattern used to expose and consume decoupled components—such as LLM inference endpoints, vector databases, and agentic tools—via stateless HTTP requests. It acts as the primary connective tissue in RAG pipelines, enabling the retrieval of context and the execution of external actions through standardized JSON payloads.
The communication protocol for remote tool-calling and API-based model access, distinct from the agent's internal Python logic.
"A Drive-Thru Window: The agent places a standardized order (HTTP request) and receives a packaged meal (JSON response) without ever needing to see or enter the kitchen (the backend service)."
- Tool Calling(Component)
- Statelessness(Prerequisite)
- JSON(Data Format Component)
- Webhooks(Asynchronous Extension)
Conceptual Overview
In AI systems, REST is the architectural pattern used to expose and consume decoupled components—such as LLM inference endpoints, vector databases, and agentic tools—via stateless HTTP requests. It acts as the primary connective tissue in RAG pipelines, enabling the retrieval of context and the execution of external actions through standardized JSON payloads.
Disambiguation
The communication protocol for remote tool-calling and API-based model access, distinct from the agent's internal Python logic.
Visual Analog
A Drive-Thru Window: The agent places a standardized order (HTTP request) and receives a packaged meal (JSON response) without ever needing to see or enter the kitchen (the backend service).