AI Infrastructure · GitHub ·11,957 ★

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 Jav

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Details

Author
langchain4j
Category
AI Infrastructure
Platform
GitHub
Framework
custom
Language
java
Stars
11,957
First indexed
2026-05-15
Last active
2026-05-11
Directory sync
2026-05-15
@langchain4j@langchain4jdocs.langchain4j.devDiscord

Overview

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 Jav

Quick start

git

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

Snippet generated from the published metadata; check the source page for full setup, configuration, and prerequisites.

What langchain4j can do

anthropicchatgptchromaembeddingsgemini
  • Anthropic — anthropic task automation.
  • Chatgpt — chatgpt task automation.
  • Chroma — chroma task automation.
  • Embeddings — embeddings task automation.
  • Gemini — gemini task automation.

Frequently asked questions

What is 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 Jav
How do I install langchain4j?
Use git: `git clone https://github.com/langchain4j/langchain4j`. Full setup details on the source page linked above.
Is langchain4j open source?
langchain4j is published on GitHub.
What are alternatives to langchain4j?
Comparable agents include awesome, openclaw, AutoGPT. Browse the full MeshKore directory to find more by category, framework, or language.

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