The agent engineering platform
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The agent engineering platform.
Build resilient agents.
Framework to build resilient language agents as graphs.
LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.
🧬 The open source chat-ai toolkit
Overview and tutorial of the LangChain Library
