Fastapi Based Restful Backend Api With Layered Architecture

via “next.js api route abstraction for backend service calls”

AI PDF chatbot agent built with LangChain & LangGraph

Unique: Uses Next.js API routes as a lightweight abstraction layer that supports both request-response and streaming patterns, avoiding the need for a separate API server. Middleware integration enables cross-cutting concerns (auth, logging) without polluting route handlers.

vs others: Simpler than separate Express/FastAPI servers because it leverages Next.js built-ins; more flexible than direct backend calls because the API layer can be extended with middleware without changing frontend code.