write

write

Type text into an input, textarea or contenteditable.

MCP tool	write
HTTP	POST /browser/write

Set submit to press Enter afterwards, which fills and submits a search box in one call. Returns the field's value read back off the element, so you can confirm the text actually landed.

Address the field with EITHER xpath OR css, never both and never neither.

Parameters

Name	Type	Required	Default	Notes
text	string	yes	—
xpath	string	no	—
css	string	no	—
session_id	string	yes over HTTP	—	The session_id returned by /browser/open. Required here.
url	string	no	—
clear	boolean	no	true
submit	boolean	no	false
wait_timeout	integer	no	30

Returns

Field	Type	Notes
value	string	The field's value read back off the element, so a caller can confirm the text landed.
url	string	Current URL after the action.
title	string	Page title after the action.

Errors are 400 for a bad argument, 401 without a token, 500 when the Grid refuses. Over MCP the same failures arrive as a tool error.

Example

MCP

write(text="…")

HTTP

curl -X POST $SELENIUM_FLOW/browser/write \
  -H "Authorization: Bearer $TOKEN" \
  -H 'Content-Type: application/json' \
  -d '{
    "session_id": "…",
    "text": "…"
  }'

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