launch-DeepResearch-Backend: FastAPI and LangGraph Backend for Deep Research Agents

RepositoryShenSeanChen/launch-DeepResearch-BackendTool

launch-DeepResearch-Backend is an open-source FastAPI service that delivers multi-step AI research workflows using LangGraph and various LLMs. It is containerised for deployment on GCP Cloud Run and connects to a companion frontend repository.

Key points

  1. Implements multi-stage research workflows covering clarification, brief generation, multi-source execution, and reporting.
  2. Supports multiple AI models including OpenAI GPT-4o, Anthropic Claude, and Kimi K2 0905.
  3. Built with FastAPI and LangGraph, offering real-time streaming progress updates.
  4. Docker-ready and designed for container deployment to GCP Cloud Run.
  5. Includes built-in health monitoring, Pydantic API models, and support for user-supplied or environment API keys.

Why it matters

Building autonomous deep research pipelines often requires stitching together iterative query expansion, multi-source execution, streaming responses, and different LLM providers. This project provides a ready-made architectural starting point combining LangGraph and FastAPI.

Analysis

The project solves the problem of orchestrating multi-step AI research routines in a standalone API service. On the technology side, it runs on Python 3.11+, FastAPI, Pydantic, LangGraph, and Uvicorn, with containerisation support for GCP Cloud Run. Supported models encompass OpenAI GPT-4o, Anthropic Claude, and Kimi K2 0905. The research cycle moves through user clarification, research brief creation, live multi-source execution with streaming updates, and report synthesis.

The target audience comprises developers wanting to integrate research agent workflows or learn LangGraph orchestration via the accompanying 25-minute YouTube walkthrough. In terms of maturity, the repository has 88 stars and 23 forks under the MIT licence, positioning it primarily as a tutorial starter kit or MVP blueprint that requires further customisation and production testing before enterprise use.

Found in

Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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Locations

  • Mattersburg
    Johann Nepomuk Bergerstraße 7/2/14
    7210 Mattersburg, Austria
  • Vienna
    Ungargasse 64-66/3/404
    1030 Wien, Austria

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