Create a NEW empty Fusion design document.

Prefer NOT calling this. If a document is already open, build in THAT one — several parts belong in ONE document as separate components (fusion_create_component). Stray documents pile up and only the user can close them by hand.

Set confirm=true only when the user explicitly asked for a new document/project, or when nothing is open at all (then it is a no-op flag). Without confirm the call is refused while any document is open.

Summarize the active document: display units, counts of bodies, components, sketches and parameters, save state, and the active component.

List all open Fusion documents with their active / modified / saved state.

List the Fusion projects a document can be saved into, and which one is active (where fusion_save_document / _as put a never-saved document).

Save a document (the active one unless document names another open one).

A never-saved document is saved into the active Fusion project automatically (optionally under name / into project), so no interactive dialog is needed.

Save a document as a NEW file called name (in project, else the active project). Use this to keep the original untouched. The current bridge confirms the document and project but does not return a reopenable version identifier.

Close a document — save=true saves it first, save=false discards unsaved changes.

Closes the active document unless document names another open one. With save=true a never-saved document is written into the active Fusion project first (use name / project to choose where); if that save fails the document is left open rather than losing the work.

Close every open document EXCEPT the active one — handy for tidying up after stray documents accumulated. save=false discards their unsaved changes.

List all solid/surface bodies with index, name, volume (mm³), and bounding box (mm). Use the index or name to target a body in other tools.

List all components in the design with their body counts.

List sketches with index, name, and number of closed profiles.

Get the overall bounding box of the whole design, in millimetres.

High-level snapshot of the design: units, counts, and a body list. A good first call to understand the current model.

Detailed info for one body (by index or name): volume, area, face/edge/ vertex counts, and bounding box.

Inspect one body by index or name, including its current operative ID, component, topology counts, volume, visibility, and bounding box.

List a body's faces (index, area mm², is_planar, centroid, normal). Use a planar face's index to sketch/drill on it (fusion_create_sketch_on_face, fusion_hole with on_body/on_face).

Enumerate one body's edges for selective operations. Returns a topology snapshot plus index, curve type, length, points, radius when circular, and adjacent face indices/types for each edge.

Mass (g), volume (mm³), area (mm²), density, and center of mass for a body (by index/name) or the whole design if omitted. Also reports material name, material source, assignment scope, and whether material evidence was verified.

Minimum distance in millimetres between two bodies.

Angle (degrees) between the first faces of two bodies.

Check interference between 2+ bodies (list of indices/names); returns the overlapping volumes (mm³). Use to validate clearances/fits in an assembly.

List all parameters (user + model) with expression, value, and unit.

Get one parameter by name.

Set a parameter's expression, e.g. '25 mm' or 'width * 2'. This is the preferred way to resize an existing parametric model.

Create a new user parameter (e.g. name='width', expression='40 mm').

Delete a user parameter by name (model parameters cannot be deleted).

Create an empty sketch on a base plane (xy/xz/yz) or construction-plane index.

Create a sketch ON a planar face of a body. Get the face index from fusion_list_faces (is_planar=true). Sketch coordinates are then local to that face.

Draw a rectangle (mm). mode='corner' treats (x,y) as a corner; mode='center' treats (x,y) as the center. Creates a new sketch on plane unless an existing sketch is given.

Draw a circle (mm) by center (x,y) and radius OR diameter.

Draw a single line segment from (x1,y1) to (x2,y2), in mm.

Draw a 3-point arc (mm): from start (x1,y1), through (x2,y2), to end (x3,y3). Useful as a sweep/revolve path.

Draw a regular polygon (mm) by center, circumradius, and side count (>=3).

Draw a spline through points [[x,y],...] (mm). type 'fit_points' or 'control_points' (uses degree).

Add a geometric constraint between sketch entities (by curve index). type: coincident/parallel/perpendicular/tangent/equal/horizontal/vertical/ concentric/collinear/midpoint/symmetry. For coincident/midpoint, entity_one is a sketch-point index. This is the key to robust, editable parametric sketches.

Add a driving dimension. type: distance/horizontal/vertical/angular/radial/ diameter. value is mm (degrees for angular). Drives parametric sizing.

Offset a sketch curve (by index) by distance mm toward (dir_x, dir_y).

Project a body's edges onto a sketch (linked reference geometry).

Extrude a sketch profile by distance mm. operation: new/join/cut/ intersect. direction: positive/negative/symmetric. profile: index or 'all'.

Revolve a sketch profile around axis x/y/z by angle degrees.

Round edges of a body by radius mm. edges='all' (default) or a list of edge indices.

Chamfer edges of a body by distance mm. edges='all' or a list of indices.

Hollow out a body to a wall thickness mm.

Pattern a body in a line along axis x/y/z: count copies, spacing mm apart.

Pattern a body around axis x/y/z: count copies spread over angle degrees.

Mirror a body across plane xy/xz/yz.

Sweep a profile (from profile_sketch) along the first curve of path_sketch. Draw the path as an open sketch (line/arc/spline) and the profile as a closed sketch, then sweep.

Loft a smooth solid between profiles taken from a list of sketch indices/ names (>=2), in order. Each sketch should contain one closed profile.

Drill a circular hole (cut) of diameter mm at (x,y). By default it goes through everything on plane (xy/xz/yz). For a hole on an existing body face, pass on_body + on_face (from fusion_list_faces); (x,y) are then in that face's local coordinates. Set depth for a blind hole.

Uniformly scale a body by factor about the origin (2.0 doubles its size).

Apply draft to faces of a body. angle deg; pull-direction plane xy/xz/yz. faces is a list of face indices (from fusion_list_faces) or omitted for all.

Split a body by a plane (xy/xz/yz) or by another body (tool_body).

Split faces of a body by a plane (xy/xz/yz).

Offset faces of a body by distance mm (creates an offset surface body).

Add a thread to a cylindrical face (face index from fusion_list_faces, the non-planar one). internal=True for a hole; modeled=True for real geometry.

Inspect thread features in the active or named component without modifying it.

List timeline features in creation order.

Create a box (cuboid): width(X) x depth(Y) x height(Z) in mm, centered on the XY origin and rising in +Z. Auto-creates a document if none is open. For a cube, pass equal width/depth/height. Pass component (a component name from fusion_create_component) to build the box INSIDE that component — useful for building assembly parts to then joint together.

Create a cylinder of height mm and radius OR diameter mm, centered on the XY origin. Auto-creates a document if none is open.

Create a sphere of radius OR diameter mm, centered on the origin. Auto-creates a document if none is open.

Rename a body.

Show or hide a body.

Delete exactly one body and verify the resulting model state. Destructive. This does not delete sketches, features, or construction geometry.

Translate a body by (dx, dy, dz) millimetres.

Rotate a body by angle degrees (right-hand rule) about an axis through a point. axis: "x"/"y"/"z" or a free direction vector [i, j, k]. origin: [x, y, z] in millimetres, defaults to the world origin. Use this to build inclined geometry that revolve/extrude alone cannot produce.

Boolean-combine a target body with one or more tool bodies (by index or name). operation: join (union), cut (subtract tools from target), or intersect. Set keep_tools=true to preserve the tool bodies.

Create a construction plane offset from a base plane (xy/xz/yz) by offset mm. Returns its index for use as a sketch plane.

List available appearance names (optionally filtered by substring).

Apply an appearance (by name) to a body. Use fusion_list_appearances to discover valid names (e.g. 'Steel', 'Aluminum', 'ABS').

Export to STL (for 3D printing). Optional body (else whole design); refinement low/medium/high. Saved on the host (default ~/fusion-mcp-exports).

Export the whole design to STEP (.step), the best format for CAD interchange.

Export the whole design to IGES (.igs). Note: IGES export is restricted on personal-use Fusion licenses — prefer STEP for CAD interchange.

Export a native Fusion archive (.f3d), preserving the full design tree.

Export a sketch to a 2D DXF file (e.g. for laser cutting / drawings).

Capture the active Fusion viewport and return it as a PNG image so you can visually inspect the model. Set fit=False to keep the current camera.

Zoom/fit the view to show the whole model.

Set a named camera orientation: home/iso/top/bottom/front/back/left/right.

Get the document's default length unit.

Set the document's display length unit: mm/cm/m/in/ft. (Note: tool inputs are always in millimetres regardless of this display setting.)

Create a component occurrence, optionally making it the build target.

Set the build target for subsequent sketch, primitive, and feature operations.

Use root to reset targeting to the root component.

Return the current build target; subsequent build operations target it.

List component occurrences: name, grounded, visible, body count.

List joints (name, type), plus as-built-joint and rigid-group counts.

Translate a component occurrence by (dx, dy, dz) millimetres.

Ground (lock in place) or unground a component occurrence.

Create a joint between two components. type: rigid / revolute / slider / cylindrical / planar; axis (x/y/z) is the motion axis. By default it joins at the component origins; pass face_one/face_two (planar face indices on each component's first body) to mate specific faces.

Create a flat pattern from an EXISTING sheet-metal body. Note: Fusion's API cannot create sheet-metal flanges/bends (model those interactively).

Create an as-built joint (keeps both components in their current place).

Lock 2+ components together as a rigid group (pass a list of names).

List CAM setups and their operations. Requires the Manufacturing workspace to have been opened once in Fusion.

List operations in a CAM setup (name, has_toolpath, is_valid).

List cutting tools from the local tool library (for assigning to operations).

Create a CAM setup around a body. operation_type: milling/turning/cutting.

Add an operation to a setup by strategy (e.g. face, pocket2d, adaptive2d, contour2d, drill, bore). Optional tool_diameter/stepdown/stepover in mm. Note: most strategies need a tool assigned before a toolpath will generate.

Generate toolpaths: one operation in a setup, a whole setup, or all=true.

Post-process a setup (or one operation) to a G-code file on the host (default ~/fusion-mcp-exports/nc). post_processor is a generic post name.

Undo the last operation (guards against a parametric->direct design flip).

Redo the last undone operation.

Delete every timeline feature, clearing the design. Destructive.

Suppress a timeline feature by name (from fusion_list_features).

Unsuppress a timeline feature by name.

Thicken a (surface) body's faces into a solid by thickness mm. direction 'positive' or 'symmetric'.

Patch a closed sketch profile into a surface body.

Create a ruled surface from a body edge (by index), extended by distance mm.

Stitch surface bodies (list of indices/names) into one, with tolerance mm.

Inspect the live Fusion API: list a class's (or an object path's) properties and method signatures. target is a class name (e.g. 'ExtrudeFeatures') or a path ('rootComponent.bRepBodies'); query filters member names. Use this to discover the exact API to drive via fusion_api_call.

Get the Autodesk cloudhelp URL for an API class or member (e.g. 'ExtrudeFeatures.createInput').