4lines.ai

Returns what this 4lines.ai MCP server can do for you right now: contract version, available tools, limits, and how to start.

Creates a new empty single-storey floor-plan draft and returns plan_id, plan_token, claim_url and expires_at.

Adds walls to a plan.

Adds doors and windows to existing walls.

Places a render camera on the plan (max 4).

Returns the full plan document (public schema, meters) plus a summary.

Returns a PNG image of the plan — LOOK at what you built.

Checks the WHOLE plan and returns findings as text — no image, so it is cheap and has its own generous budget.

Data source for the interactive plan viewer (the UI that view_plan renders): the plan as an SVG drawing plus per-room floor areas and element counts.

Moves a wall — by its endpoints, or by move_m + towards, which slides the whole wall across itself without recomputing anything — and/or changes its thickness.

Deletes a wall AND its anchored openings (explicit cascade: the response lists removed_openings).

Labels rooms.

Places furniture from the catalogue.

Moves and/or rotates a furniture piece by id, and decides whether it is ANCHORED to a wall or free-standing.

Removes a furniture piece by id, or several with furniture_ids — clearing out a whole room is one call.

Changes WHAT a piece is: its size and the parameters of its kind.

Changes a door or window in place — the tool to reach for when a warning tells you a door swing is blocked, because flipping hinge or swing is exactly what it asks for.

Hangs the hinged doors of the plan the way an architect would, from the rooms it already has: the leaf swings INTO the room the door serves (from the hallway into the bedroom, from the bedroom into its ensuite or walk-in closet, from outside inward, between two rooms into the more private one) and hangs on the jamb nearest the perpendicular wall on that side, so the open leaf folds against it — unless that leaf would sweep furniture and the other jamb would not.

Removes a door or window by id — or several with opening_ids — leaving its wall intact.

Re-aims an EXISTING camera: position, direction, field of view or eye height.

Removes a camera by id, or several with camera_ids, and frees their slots.

Removes a room LABEL, or several with room_ids.

Draws ZONE BOUNDARY LINES of an area scheme (dwellings, use, common areas — what Revit calls areas).

Names a ZONE of an area scheme: an anchor point inside the region the zone lines enclose, plus name, use (dwelling | commercial | common | other | void) and whether it is exterior (balcony, terrace: counts at exterior_factor 0, 0.5 or 1).

Removes a zone anchor (name, use), or several with zone_ids.

BULK composition valve: replaces the whole plan with a complete document in one atomic call (all-or-nothing validation).

OPTIONAL alternative to drawing the walls yourself, for RESIDENTIAL DWELLINGS ONLY (for hotels, offices or any non-residential program, design the layout with the granular tools instead): asks the 4lines architecture engine (CP-SAT grounded in international good-practice residential architecture: circulation widths, room proportions, window-to-area rules, Neufert-informed sizing) to draft as many as 6 interior layouts for a room PROGRAM you describe, optimizing adjacencies, circulation and proportions globally.

Materializes one variant from a previous solve_program call into the plan: REPLACES the whole geometry (walls, openings, room labels) with that layout.

Turns a placed camera into a PHOTOREALISTIC RENDER of what it sees, returned inline — no account, nothing to configure.

Stateless "selection": returns compact addressable listings (ids + geometry) filtered by proximity, kind or room.

Designs a FITTED KITCHEN and places it in one call.

Designs a LINEAR BATHROOM and places it in one call.

Designs a BEDROOM and places it in one call.

Designs a LIVING ROOM (or a living-dining, or the whole LDK) and places it in one call.

List only account projects explicitly authorized for this OAuth connection.

Create a short-lived account-bound link to the 4lines project consent screen.

Read an authorized project revision and real floor IDs.

Move one existing, unlocked, unanchored furniture piece on an explicitly identified floor of an authorized account project.

Apply existing 4lines modelling tools to the saved account project, as one atomic batch.

Resolve the original draft plan_id to its saved account project after claim.

Open the live 2D/3D viewer for an explicitly authorized account project.

Widget-only live scene for one real project floor.

Renew this widget session using current host OAuth and its original active grant.

Widget-only modelling operation on the displayed floor.