evaluate

MCP tool from Sidebutton by sidebutton

Execute JavaScript in browser

How to use it

evaluate is exposed by the Sidebutton MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the evaluate tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.

Install Sidebutton

$npx sidebutton --stdio
FULL SIDEBUTTON LISTING

Other tools in Sidebutton (28)

browser_batch

Run a sequence of browser actions in one call

capture_page

Capture selectors from current page

clear_basic_auth

Clear stored HTTP Basic Auth credentials

click

Click an element

exists

Check if element exists

extract

Extract text from element

extract_all

Extract all matching elements

extract_map

Extract structured data from repeated elements

fill

Fill input value (React-compatible)

get_browser_status

Check browser extension connection

get_run_log

Get execution log for a run

get_workflow

Get workflow YAML definition

hover

Hover over element

inject_css

Inject CSS into the page (blur/hide elements before a screenshot)

list_run_logs

List recent workflow executions

list_workflows

List all available workflows

navigate

Navigate browser to URL

press_key

Send keyboard keys

publish_artifact

Publish evidence (screenshots, reports) from a session

run_workflow

Execute a workflow by ID

screenshot

Capture page screenshot (pass path to write a PNG file instead of returning image bytes)

scroll

Scroll the page

scroll_into_view

Scroll element into viewport

select_option

Select dropdown option

set_basic_auth

Set HTTP Basic Auth credentials for the connected tab

snapshot

Get page accessibility snapshot

type

Type text into an element

wait

Wait for element or delay