Browser
Browser — MCP tools exposed to agents.
4 tools in this group.
browser_start
Start/activate the current session's browser without navigating (opens about:blank), creating the session if a named one does not yet exist. If the MCP server is configured with a remote WebDriver-BiDi endpoint, this connects to that endpoint instead of launching locally. To navigate to a page, use browser_open; to stop the session, use browser_stop.
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
headless | boolean | no | false | Run browser in headless mode (no visible window) |
session | string | no | Optional: named session to run this call in (default: current session). |
browser_stop
Stop the current session's run: close its tabs/context and end its trace. The shared browser process and other sessions keep running (an isolated session closes its own dedicated browser). No-op if the session has no active browser. To start or re-run a session, use browser_start; to navigate, use browser_open.
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
session | string | no | Optional: named session to run this call in (default: current session). |
browser_get_window
Get the OS browser window dimensions and state
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
session | string | no | Optional: named session to run this call in (default: current session). |
browser_set_window
Set the OS browser window size, position, or state
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
height | integer | no | Window height in pixels | |
session | string | no | Optional: named session to run this call in (default: current session). | |
state | string | no | Window state: normal, maximized, minimized, or fullscreen (one of: normal, maximized, minimized, fullscreen) | |
width | integer | no | Window width in pixels | |
x | integer | no | Window x position in pixels (may be negative on multi-monitor setups) | |
y | integer | no | Window y position in pixels (may be negative on multi-monitor setups) |