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.
At a glance
Is this tool relevant to you?
What it does
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.
May suit
People who want an AI system to plan or carry out multi-step tasks.
Before you try it
The repository reports a Apache-2.0 license. Setup difficulty and device support still need to be checked upstream.
Evidence & freshness
What we know, and how recently we checked
This record comes from the wider automated directory. It has not yet passed the stronger catalog verification checks.
- Source
- Automated project sync
- Checked
- Evidence level
- Limited confidence
- Maintenance signal
- Healthy69/100
Generally healthy automated signals, with some areas worth checking in the breakdown.
The health score is an automated maintenance signal, not a security audit or a guarantee that the tool fits your needs.
How verification and health scoring work
⭐
11.9K
Stars
🍴
2.2K
Forks
👥
400
Contributors
💚
Healthy69/100
Health Score
Star History
Not enough data for chart
Health Score Breakdown
Star Momentum
0
Commit Frequency
100
Issue Health
60
Contributors
100
Release Cadence
50
Documentation
100
Community Signal
100
Project Info
- Language
- Java
- License
- Apache-2.0
- Last Commit
- 2mo ago
- Last Release
- 1.14.1 (2mo ago)
- Open Issues
- 730
- Bus Factor
- 10
- Commits/Week
- 28.2
- Avg Issue Close
- 9.1 days
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