The LangGraph-GUI Backend is an open-source FastAPI service that powers the LangGraph graphical interface. It handles CRUD operations on graph nodes and edges, manages workflow execution against various language models, and returns real-time inference results. The backend supports authentication, logging, and extensibility for custom plugins, enabling users to prototype, test, and deploy complex natural language processing workflows through a visual programming paradigm while maintaining full control over execution pipelines.

Nexus Agents is a modular framework for constructing AI-driven multi-agent systems with large language models at their core. Developers can define custom agents, integrate external tools, and orchestrate workflows through declarative YAML or Python configurations. It supports dynamic task routing, memory management, and inter-agent communication, ensuring scalable and reliable automation. With built-in logging, error handling, and CLI support, Nexus Agents streamlines building complex pipelines spanning data retrieval, analysis, content generation, and customer interactions. Its architecture allows easy extension with custom tools or LLM providers, empowering teams to automate business processes, research tasks, and operational workflows in a consistent and maintainable manner.