MCP for the Workspaces stack is Rabun. Burton’s Agent is the client. rabun serve speaks stdio. rabun serve --transport http binds 127.0.0.1:8080 with POST /mcp and GET /health.

Source: Burton-Workspaces/rabun

{
  "mcpServers": {
    "rabun": {
      "command": "rabun",
      "args": ["serve"]
    }
  }
}

Orchestrator tools: ping, list_apps, run_app, stop_app, app_status, etl_publications, and etl_status. Wiki tools wiki_list, wiki_read, and wiki_search read RABUN_WAREHOUSE_ROOT/<team_id>/ (aliases BURTON_WIKI_ROOT / RABUN_WIKI_ROOT, default data/warehouse).

A second local MCP server, curator, is a vault librarian. It is not a substitute for rabun serve.

Burton is primarily an MCP client today (the Images plugin calls a generate tool; the Agent pane talks to Rabun). “MCP out of the box” means the installed stack, not a Burton /api/mcp route.