April 28, 2026

MentisDB 0.9.6.42 — SSE, bind_host, Agent-Scoped Context

0.9.6.42 adds Server-Sent Events streaming to the MCP servers, a bind_host parameter for multi-homed deployments, and agent-scoped filtering on mentisdb_recent_context so each agent can load only its own recent thoughts.

SSE on MCP servers. start_mcp_server and start_https_mcp_server now return (ServerHandle, SseBroadcaster) tuples. The GET endpoint serves text/event-stream with live MCP events, and POST requests auto-broadcast JSON-RPC results and errors. cloudllm_mcp bumped to 0.3.0. Any SSE-capable MCP client (including Claude Desktop, Hermes, and web dashboard widgets) can now subscribe to real-time protocol events.

MCP SSE Streaming

SSE (Server-Sent Events) is the standard browser/webhook-compatible event streaming protocol. All MCP tools — append, search, list, get, bootstrap — now broadcast their JSON-RPC results and errors as SSE events on the GET endpoint. This means:

Dashboard widgets can subscribe to live thought events without polling.
Agent frameworks with SSE support (Hermes, OpenClaw) get real-time protocol visibility.
Webhook-like behavior without a separate webhook registration — any SSE subscriber sees every event.

bind_host on standard_mcp_router

The MCP server previously bound to 127.0.0.1 by default, inaccessible from other machines on the network. The new bind_host parameter on standard_mcp_router — controlled by the MENTISDB_BIND_HOST env var — allows binding to 0.0.0.0 for multi-homed machines, Docker containers, or LAN-accessible deployments. Origin validation is skipped on unspecified addresses (0.0.0.0, ::, ::1) for compatibility with tools that don't send Origin headers.

Agent-Scoped Recent Context

mentisdb_recent_context now accepts an optional agent_id parameter. When set, it scans the chain in reverse and returns the last N thoughts from that specific agent — not the chain's last N thoughts overall. This matters on multi-agent chains where a specialist's recent work might be buried under 20+ thoughts from other agents:

// Before: gets the chain's 10 most recent thoughts (mixed agents)
mentisdb_recent_context(last_n=10)

// After: gets the agent's 10 most recent thoughts (scoped)
mentisdb_recent_context(agent_id="orion", last_n=10)

The unfiltered path is unchanged. When agent_id is omitted, behavior is identical to previous versions.

Upgrade

cargo install mentisdb --force

No migration required. SSE is enabled by default on all MCP server surfaces.