save_pdf

save_pdf

Print the current page to PDF and keep it with the session's files.

MCP tool	save_pdf
HTTP	POST /browser/pdf

This is the browser's own print output, so text stays selectable and the whole document is included rather than just the viewport. Returns the stored file; session_files gives it a link.

Parameters

Name	Type	Required	Default	Notes
session_id	string	yes over HTTP	—	The session_id returned by /browser/open. Required here.
url	string	no	—
filename	string	no	—

Returns

Field	Type	Notes
file	object	The stored file, as the Grid's download store lists it.
bytes	integer	Size of the PDF in bytes.
url	string	Current URL after the action.
title	string	Page title after the action.

Errors

Status	Means
400	The request cannot succeed as sent — a missing field, a value that was rejected, or a locator that matched nothing before the wait ran out. Do not retry it unchanged.
401	Missing or wrong bearer token.
404	No such browser session. It ended, the Grid reaped it, or the id was never real. Open a new one and retry.
500	Something failed that this server did not expect.
503	The Grid could not serve this — unreachable, or no free slot for a new browser. Worth retrying after a wait.

Over MCP the same failures arrive as a tool error.

Example

MCP

save_pdf()

HTTP

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

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