Atmosphere/atmosphere

Health v2 · maintenance only

Adoption not part of the score

3796 stars · 761 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Atmosphere is a portable AI agent runtime for the JVM that lets a single @Agent class run across twelve AI runtimes (Spring AI, LangChain4j, Anthropic, and more) behind one SPI. It provides token streaming, tool calls, human approvals, and governance over WebSocket, SSE, long-polling, gRPC, or WebTransport/HTTP3, and speaks MCP, A2A, and AG-UI protocols.

Use cases

• stream LLM tokens to browsers over WebSocket or SSE from a Java backend
• build production AI agents on the JVM with tool calls and human approval gates
• swap AI frameworks like Spring AI or LangChain4j without rewriting agent endpoints
• add governance, policy admission, and cost ceilings to AI agent execution
• run durable, resumable agent sessions that survive JVM restarts
• orchestrate multi-agent fleets with live observability
• connect Java agents to MCP, A2A, or AG-UI clients

When to choose

• you are building AI agents in Java/Kotlin on the JVM and need production-grade transports
• you need framework portability across multiple AI runtimes behind one API
• you require human-in-the-loop approvals, governance policies, or durable resumable runs
• you want real-time streaming (WebSocket/SSE/gRPC) plus MCP/A2A/AG-UI protocol support out of the box

When to avoid

• you are building agents in Python, JavaScript, or another non-JVM ecosystem
• you need a simple prototype where a direct SDK call to one LLM provider suffices
• you want a fully managed cloud agent platform rather than a self-hosted framework
• your stack has no JVM dependency and adding one is not justified

Facets

framework · maturity active

agent-framework websocket rpc middleware llm-inference rag mcp chatbot authorization streaming large-language-models backend developer-tools web-development jvm cross-platform ai-agents agent-runtime mcp a2a ag-ui human-in-the-loop token-streaming sse grpc webtransport governance durable-sessions multi-agent spring-ai langchain4j real-time spring quarkus

Member repositories

For agents

markdown · JSON · MCP: product_card(name="Atmosphere/atmosphere")