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.

anthropic chatgpt chroma embeddings gemini gpt huggingface java langchain llama llm llms milvus ollama onnx openai openai-api pgvector pinecone vector-database
16 Open Issues Need Help Last updated: Jul 4, 2026

Open Issues Need Help

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enhancement good first issue P3 Spring Boot RAG

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
enhancement good first issue P3 Dependencies

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
enhancement good first issue P2 P3 RAG

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
enhancement good first issue P3

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
enhancement good first issue P3 Spring Boot

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
enhancement good first issue

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
enhancement good first issue Spring Boot

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
enhancement good first issue Structured Outputs AWS Bedrock

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
enhancement good first issue P2

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
good first issue Documentation

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
bug good first issue P2 AI Services Multimodality

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
enhancement good first issue P2 Structured Outputs

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database
enhancement good first issue

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
#anthropic#chatgpt#chroma#embeddings#gemini#gpt#huggingface#java#langchain#llama#llm#llms#milvus#ollama#onnx#openai#openai-api#pgvector#pinecone#vector-database