Atmosphere / atmosphere
Portable AI agent runtime for the JVM. One @Agent class runs on Spring AI, LangChain4j, Anthropic, or 9 more behind one SPI. Token streaming, tool calls, human approvals, and governance over WebSocket, SSE, gRPC, or WebTransport/HTTP3. Speaks MCP, A2A, and AG-UI.
Why this job: says: agent runtime; topics: a2a, crewai, ai-agents, agentic-ai
What it does
The real-time engine for AI agents on the JVM. Tokens flow from the LLM runtime to the client through a broadcaster you can filter, gate, and observe — over WebSocket, SSE, long-polling, or gRPC, and out through MCP, A2A, and AG-UI. A plain @Agent is a full deep agent, batteries-included, and Atmosphere handles reconnect, authorization, and governance.
Get started
No single install command. Read the steps in the README (opens in new tab)
- Maintenance
- Active
- Last commit 5 days ago
- Stars
- 3,830
- +2 this week
- Licence
- Apache-2.0
- Allows business use
- Downloads for
- None listed
- No release files
- Latest tag
- atmosphere-4.0.76
- Released 18 days ago
- Built with
- Java
- 83% of the code
Is it looked after?
- Contributors
- 2
- Last 90 days
- Issues
- 100% closed
- 2 still open
- Pull requests
- 363 merged
- 7 waiting
- Releases
- 71
- 30+ in the last year
- No contributing guide
- Security policy (opens in new tab)
- Code of conduct (opens in new tab)
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More: languages, topics and project record
Languages
- Java 83%
- TypeScript 8%
- Shell 4%
- Kotlin 2%
Topics
- java
- websocket
- spring-boot
- event-driven
- quarkus
- mcp
- sse
- agentic-ai
- acp
- embabel
- koog
- langchain4j
Project record
- JobAgent frameworks
- StatusListed
- Commits9,348
- Forks763
- Watching225
- Stars in 28 days+11
- CreatedJun 30, 2010
- First seen by usNov 7, 2026
- CheckedNov 9, 2026