
langchain4j
by langchain4j (organization)
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… (description from the project’s GitHub page)
Repository facts
- Stars
- 13,259
- Forks
- 2,702
- Open issues and pull requests
- 1,010
- Primary language
- Java
- License
- Apache License 2.0 (Apache-2.0)
- Owner
- langchain4j · Organization
- Created
- Jun 20, 2023
- Last push
- Oct 16, 2026
Topics
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