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Browser Runtime (si browser)

Browser MCP si browser manages the Dockerized Playwright MCP runtime used by SI agents. Related:

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Commands

si browser build
si browser start
si browser status
si browser logs
si browser stop
si browser proxy

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Quickstart

si browser build
si browser start
si browser status
Default endpoints after start:
  • MCP endpoint: http://127.0.0.1:8932/mcp
  • noVNC endpoint: http://127.0.0.1:6080/vnc.html?autoconnect=1&resize=scale
  • Internal Docker endpoint for SI containers: http://si-playwright-mcp-headed:8931/mcp

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Proxy mode (optional)

Use proxy mode for legacy /mcp SSE clients: 
si browser proxy --upstream http://127.0.0.1:8932

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Operational notes

  • si browser start can build the image automatically unless --skip-build is set.
  • si browser start attaches the browser runtime to the SI Docker network (si by default, override with --network / SI_BROWSER_NETWORK).
  • SI-managed codex/dyad containers auto-register MCP server si_browser to the browser MCP endpoint.
  • Keep profile directories isolated per environment.
  • Use si browser logs --follow during smoke tests and rollout checks.