Arc Control (macOS)

{
  "name": "io.github.DB-25/arc-control-mcp",
  "title": "Arc Control (macOS)",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "version": "0.4.0",
  "packages": [
    {
      "version": "0.4.0",
      "transport": {
        "type": "stdio"
      },
      "identifier": "arc-control-mcp",
      "registryType": "npm",
      "registryBaseUrl": "https://registry.npmjs.org",
      "environmentVariables": [
        {
          "name": "ARC_MCP_LABEL",
          "default": "default",
          "description": "Names this agent's tab ownership. Two agents with different labels never see each other's owned tabs. Defaults to \"default\"."
        },
        {
          "name": "ARC_MCP_SPACE",
          "default": "Agent",
          "description": "With ARC_MCP_WINDOW=space, the Arc space new tabs open into, when a space with that name exists. Arc will not let a script create a space, so make it by hand. Defaults to \"Agent\"."
        },
        {
          "name": "ARC_MCP_STATE_DIR",
          "format": "filepath",
          "description": "Directory where per-session tab ownership is recorded, so a restarted agent can clean up the tabs its previous run left behind. Defaults to ~/Library/Application Support/arc-control-mcp."
        },
        {
          "name": "ARC_MCP_WINDOW",
          "default": "dedicated",
          "description": "\"dedicated\" keeps agent tabs in one separate agent window, never the user's own. \"space\" puts them in the Agent space of the user's window. Defaults to \"dedicated\"."
        },
        {
          "name": "ARC_MCP_WINDOW_PLACEMENT",
          "default": "auto",
          "description": "Where the agent window goes once, at creation: \"auto\" (largest non-main display, else where Arc puts it), \"second-display\", \"minimized\" (experimental) or \"none\". Needs Accessibility. Defaults to \"auto\"."
        },
        {
          "name": "ARC_MCP_IDLE_MS",
          "default": "1500",
          "description": "How many milliseconds the user must have been idle before the server does anything visible. 0 turns the activity gate off. Defaults to 1500."
        },
        {
          "name": "ARC_MCP_IDLE_WAIT_MS",
          "default": "15000",
          "description": "How many milliseconds to wait for that pause before failing with userActive true. Defaults to 15000."
        },
        {
          "name": "ARC_MCP_ARC_DATA_DIR",
          "format": "filepath",
          "description": "Directory the local data tools (sidebar_tree, find_stale_tabs, search_archive, search_history) read Arc's files from. Defaults to ~/Library/Application Support/Arc."
        },
        {
          "name": "ARC_MCP_ALLOW_HISTORY",
          "description": "Set to 1 to let search_history run. Off by default, and any other value leaves it off."
        },
        {
          "name": "ARC_MCP_CDP",
          "description": "Set to 0 to disable the DevTools engine (trusted input, screenshots, console and network capture). On by default, and inert until Arc is launched with --remote-debugging-port."
        },
        {
          "name": "ARC_MCP_CDP_PORT",
          "default": "9222",
          "description": "The DevTools port to probe on 127.0.0.1. The host is fixed. Defaults to 9222."
        },
        {
          "name": "ARC_MCP_ALLOWED_ORIGINS",
          "description": "Guardrail. Comma list of origins the agent may touch (host, *.host, scheme://host[:port], file://, about:). Anything not listed is refused. Unset means no allow list."
        },
        {
          "name": "ARC_MCP_BLOCKED_ORIGINS",
          "description": "Guardrail. Comma list of origins the agent may not touch. Wins over the allow list. Unset means no block list."
        },
        {
          "name": "ARC_MCP_BLOCK_READS",
          "description": "Set to 1 to apply the origin lists to read tools as well as changing ones. Off by default."
        },
        {
          "name": "ARC_MCP_READ_ONLY",
          "description": "Set to 1 to expose only the read-only tools. Off by default."
        },
        {
          "name": "ARC_MCP_AUDIT_LOG",
          "format": "filepath",
          "description": "Path of a file that gets one JSON line per changing call (time, tool, tab, origin, ok, error), never typed values or script code. Unset means no audit log."
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/DB-25/arc-control-mcp",
    "source": "github"
  },
  "websiteUrl": "https://github.com/DB-25/arc-control-mcp",
  "description": "Arc browser MCP for macOS: agent window, snapshots, DevTools input, guardrails"
}