uploaded_to
the numeric page ID to attach the image to. BookStack rejects uploads without a real page context.
How to use it
uploaded_to is exposed by the Bookstack MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the uploaded_to tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.
Install Bookstack MCP
pip install -r fastmcp_server/requirements.txtOther tools in Bookstack MCP (7)
bulk create, update, and delete operations
unified CRUD operations for books, bookshelves, chapters, and pages (Letta-compatible)
list and filter content entities with pagination
unified create/read/update/delete/list interface for images
full-text search across BookStack content
advanced discovery with extension, date, size, and usage filters
must be gallery for standard content images (use drawio only when uploading diagrams.net PNGs)