LangChain SDK

LangChain is the open-source SDK for building reliable, production-ready LLM applications by chaining together models, data sources, and external tools.

This is your core framework for developing advanced LLM applications, available in Python and TypeScript. LangChain simplifies complex workflows: it abstracts the boilerplate for creating Agents, Chains, and Retrieval systems (RAG). The SDK offers a massive ecosystem of over 1000 integrations (OpenAI, Anthropic, various vector stores), ensuring you can swap components without rewriting core logic. Use it to quickly move from prototype to a dependable production system, for example, by building a sophisticated agent that uses a search tool and a vector database for real-time data access.

https://docs.langchain.com