langchain4j

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.

java

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12.8k Stars

2.4k Forks

116 Watchers

Java Language

apache-2.0 License

100 SrcLog Score

Cost to Build

$1.85M

Market Value

$12.49M

How is this calculated?

Growth over time

4 data points · 2025-03-01 → 2026-08-01

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What is the langchain4j/langchain4j GitHub project? Description: "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.". Written in Java. Explain what it does, its main use cases, key features, and who would benefit from using it.

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How to clone langchain4j

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git clone https://github.com/langchain4j/langchain4j.git

Clone via SSH

[email protected]:langchain4j/langchain4j.git

Download ZIP

Download main.zip

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