SNES 16-bit pixel art of a robot wizard in a red cape holding floating weather and geocoding tools, with code runes in the background

AI Agent Tools in Quarkus LangChain4j: When the REST Client Becomes the LLM's Right Hand

Build an AI agent that calls real REST APIs as tools, without writing any orchestration logic. REST Client + @Tool = automatic tool. The LLM decides when to call, which to call, and with what arguments. Everything runs locally with Ollama via Dev Services, zero API key.

May 14, 2026 路 17 min 路 Matheus Oliveira
Java AI libraries comparison

Java AI Libraries Compared: LangChain4j, Spring AI, and Quarkus LangChain4j

I built the same AI app with LangChain4j, Spring AI, and Quarkus LangChain4j. One of them took 92 lines. The others took 192 and 180.

April 25, 2026 路 12 min 路 Matheus Oliveira