Agno 3.0.6 adds stateless MCP serving so multi-replica AgentOS deployments need no session affinity

GitHub·high signalXBlueskyLinkedInCopy link

Released 2026-09-04, `MCPConfig(stateless=True)` serves `/mcp` without session tracking so any replica can answer any request, at the cost of server-initiated notifications and SSE resumability, which is why it stays off by default. `MCPTools(protocol_mode=...)` picks which MCP protocol era to negotiate, defaulting to `"legacy"` with `"auto"` reaching the sessionless era dated 2026-07-28, and Agno's MCP clients are now built on `fastmcp.Client` (#9927, #9269). The release also adds an AgentOS MCP Server Card at `GET /mcp/server-card` listing served tools, and fixes Anthropic assistant turns being replayed non-verbatim so thinking blocks were rejected.