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atmosphere

Java runtime for AI agents that streams tokens and tool events over WebSocket, SSE or gRPC, with human approvals.

Harness by Atmosphere

IndexedApache-2.0★ 3,823
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npm install atmosphere.js

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About

Atmosphere is an agent runtime for the JVM built on a real-time broadcaster. A plain @Agent class gets memory, a plan, a virtual filesystem and sub-agent delegation by default. Coordinators, handoffs, durable workflows with checkpoints and human approval gates are included, and the same agent can be exposed over MCP, A2A and AG-UI. It has twelve runtime adapters behind one AgentRuntime SPI and runs inside a servlet container, Quarkus or Spring Boot host.

Use cases: agent-orchestration

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Fact sheet

Languages
JavaREADME
Packages
org.atmosphere:atmosphere-runtime (maven), atmosphere.js (npm)README
Multi-agent
YesREADME
Orchestration
handoffs, otherREADME
MCP support
Built inREADME
A2A support
Built inREADME
Streaming
YesREADME
Memory
short-term, long-termREADME
Human in the loop
YesREADME
Deploys to
tomcat, jetty, netty, undertow, quarkus, spring-bootREADME
Maturity
Stablegithub.com

Facts extracted by Claude Haiku 5.5 from the linked sources on Oct 24, 2026. Wrong fact? Tell us.

Alternatives

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    Signals

    Stars
    3,823
    Forks
    764
    Open issues
    1
    Last commit
    Oct 23, 2026 (5 days ago)
    Last release
    Oct 22, 2026 (5 days ago)

    From GitHub (fetched Oct 24, 2026).

    Details

    Packages
    maven org.atmosphere:atmosphere-runtimenpm atmosphere.js
    License
    Apache-2.0
    Repository
    github.com/Atmosphere/atmosphere
    Website
    async-io.live
    First seen
    Oct 24, 2026
    Last checked
    Oct 24, 2026
    Source
    READMEgithub-graphql

    More from Atmosphere

    Cite this page

    atmosphere. Agent Mart. https://agentmart.dev/harnesses/atmosphere (last updated 2026-10-24)