Last updated 07-19-2026
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Agents-Flex
Agents-Flex is a lightweight Java framework for building AI agents and multimodal applications. It wraps chat, image, speech, video, embedding, rerank, tool calling, Skills, sandbox execution, RAG, and agent orchestration behind shared Java APIs so teams can ship production systems without stitching together separate SDKs.
The framework draws on ideas from LangChain and LlamaIndex but stays framework-agnostic: you can drop it into Spring, Quarkus, Micronaut, Servlet apps, or plain Java. Provider-specific request formats sit behind ChatClient and ChatRequestSpecBuilder abstractions, which makes it straightforward to add new model vendors or swap between OpenAI, Qwen, DeepSeek, Moonshot, Ollama, and domestic Chinese cloud services.
Agents-Flex targets engineers who need more than a demo chatbot. The docs cover ReAct and routing agents, MCP integrations, Text2SQL, WebSearch, vector stores, OpenTelemetry observability, retry and circuit-breaker policies, and isolated Skill runtimes for local or remote sandbox execution.
Connect chat models from OpenAI, Qwen, DeepSeek, Moonshot, Ollama, and other vendors through one ChatModel API with sync or streaming calls
Expose Java methods, MCP servers, Skills, and subagents to agents using ReAct, routing, and tool-calling patterns
Run RAG pipelines with document loaders, vector stores, rerankers, WebSearch, and hierarchical LLM Wiki navigation
Generate images, synthesize speech, transcribe audio, and queue async video jobs behind the same Java interfaces
Ship with OpenTelemetry tracing, model routing, retries, and sandboxed Skill execution for production workloads
Apache 2.0 open source with a Maven BOM so you only pull the modules you need.
One Java API surface spans chat, tools, RAG, image, speech, video, and agent orchestration.
Built-in OpenTelemetry hooks cover model and tool calls without custom instrumentation code.
You need Java 8+ and Maven or Gradle fluency before the quick start makes sense.
Most documentation is written in Chinese, which slows onboarding for English-only teams.
What is Agents-Flex?
Agents-Flex is an open-source Java framework for building AI agents and multimodal applications. It unifies access to large language models, image and video generation, speech APIs, tool calling, RAG, and agent orchestration.
Is Agents-Flex free to use?
Yes. Agents-Flex is released under the Apache 2.0 license. You install it via Maven or Gradle and bring your own model API keys or cloud credentials.
What Java version does Agents-Flex require?
Agents-Flex requires Java 8 or higher. The getting started guide assumes familiarity with Maven or Gradle for dependency management.
Can Agents-Flex run inside Spring Boot or other Java frameworks?
Yes. The framework is not tied to a specific web stack. Documentation states it works in Spring, Quarkus, Micronaut, Servlet environments, or standalone Java projects.
Does Agents-Flex support multimodal outputs beyond text chat?
Yes. Agents-Flex includes modules for image generation, text-to-speech, speech-to-text, and async video generation, each exposed through dedicated Java model interfaces.