Connect an AI assistant

Last updated 11 November 2026

QS Precision has an MCP server, so an AI assistant such as Claude can work on your takeoffs with you: read your drawings and quantities, measure rooms, count symbols, file items in your bill’s folders and fill your workbook, as you ask it to. You see every change in the app at once, and each one can be undone there (Ctrl/⌘+Z).

What you need

  • A QS Precision account: sign in with Google (free during early access).
  • At least one project, opened once in the app (signed in), so it is on your account.
  • An AI assistant that connects to remote MCP servers: Claude (web, desktop, mobile), ChatGPT and others.

Connect in Claude

  1. Open Settings → Connectors (in claude.ai or the Claude app) and choose Add custom connector, or find QS Precision in the Connectors Directory and choose Connect.
  2. For a custom connector, name it QS Precision and give this URL:
    https://mcp.qsprecision.com/mcp
  3. A QS Precision page asks whether to allow access. Choose Allow and sign in with the Google account you use for QS Precision.
  4. Back in Claude, ask about your projects. In a new chat, check the connector is turned on (the tools menu).

Other assistants: add https://mcp.qsprecision.com/mcp as a remote MCP server (streamable HTTP, OAuth). Sign-in is the same.

Things to ask

  • “List my QS Precision projects and give me the takeoff of the latest one.”
  • “On sheet 3, set the scale from the title block and measure every room into an item ‘Floor finishes’ with a 2.7 m room height.”
  • “Count the sockets on the ground floor plan and put them in a count item ‘Power sockets’.”
  • “Which sheets refer to detail 5? Read the pile cap sizes from it.”
  • “Put the quantities of every item in the Workbook, with a column for unit and a total row.”
  • “Check the areas you placed against the drawing and fix any that miss the walls.”

What an assistant places from its reading of a picture is marked placed by AI — check it in the app. Rooms it measures with measure_rooms or trace_area follow the drawing’s own lines exactly. Check quantities before you use them in a bid, as you would anyone’s.

What the assistant can do

Read

  • list_projects: your projects, most recently edited first
  • get_takeoff: items, quantities per item and per sheet, materials, room schedule, scales, folders
  • get_shapes: where every measured shape lies on its sheet
  • view_sheet: a picture of a sheet, a sharp close-up of part of it, with your shapes and a grid drawn on
  • get_sheet_text: all the text on a sheet (notes, dimensions, legends, title block) with positions
  • get_sheet_links: section marks, callouts and detail references between sheets
  • list_detected_rooms: rooms QS Precision found on a sheet, with exact outlines
  • get_current_view: what you have open in the app right now: sheet, tool, selection
  • list_templates: your folder templates
  • get_workbook: the cells of the Workbook sheet
  • export_csv: the whole takeoff as CSV

Measure

  • set_scale: set a sheet’s scale from its ratio or a known dimension
  • measure_rooms: measure found rooms into an area item
  • trace_area: outline an enclosed zone along the drawing’s own lines from one point inside it
  • add_shapes: place counts, lengths and areas, snapped to the drawing (marked “placed by AI — check it”)
  • delete_shapes: remove shapes
  • rename_rooms: name measured rooms

Organise

  • create_item / update_item / delete_item: items, with their folder, colour, room height
  • set_materials: materials per item as rates, with waste
  • create_folder / rename_folder / move_folder / delete_folder: the folder tree of the bill
  • create_template / apply_template / save_project_as_template / delete_template: standard folder trees on your account
  • set_cells / clear_cells: write the Workbook sheet: text, numbers, formulas, live links to quantities
  • set_project_notes: standing notes every assistant follows on this project

What it never sees

  • Your rate book and the priced bill on the Reports tab (the Workbook sheet is shared, by your choice).
  • Your PDF files themselves: it sees a picture and the text of each sheet you have opened in the app, and the lines read from it.
  • Anyone else’s projects: it works only on your account, signed in as you.

See the privacy policy for what is kept and where. To disconnect, remove the connector in your assistant’s settings.

When something goes wrong

  • No projects: open the project once in the app while signed in with the same Google account; it syncs within a few seconds.
  • A sheet’s picture is missing: open that sheet in the app once; pictures are sent as sheets are opened.
  • “Sign-in expired”: start connecting again from the assistant; the sign-in must finish within ten minutes, in the same browser.
  • Quantities show as unscaled: the sheet has no scale yet; ask the assistant to set it, or set it in the app.

Support

Write to nguyenquang.btr@gmail.com. From the app, the account menu’s “Download diagnostic log” helps us see what happened.