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Choose up to three servers. Compare what they do, how to connect and what has actually been checked.

Compare serversAtmosphere
PurposePortable 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.
Authentication (maintainer declared)Unknown
Public launch commandnpx -y atmosphere.js
Configuration sourcePublic install instructions
Observed toolsUnknown
Last complete tool checkUnknown
LicenseApache-2.0
Open setup

A complete tool check lists tools; it does not exercise them or certify security.