Check the connection to NX. Returns NX version, receiver mode (live/batch/mock), the work part path and whether it has unsaved changes. Call this first.

Summarise the work part: feature list, bodies with bounding box [xmin,ymin,zmin,xmax,ymax,zmax] (mm), volume (mm^3), surface area (mm^2) and centroid. Units: millimetres (mm) and degrees.

ESCAPE HATCH: compile and run arbitrary NX Open code inside NX. Use it when no dedicated tool exists. The code must be a complete journal with a public static/shared Main method (C# class or VB Module). It may return a string from Main; text written to Console is captured too. Compile errors and NX exceptions are returned verbatim so you can fix the code and retry. WARNING: this executes arbitrary code with the user's privileges.

Search the NX Open .NET API that is actually loaded in the running NX (works offline, no docs needed). Give type (e.g. 'NXOpen.Features.ExtrudeBuilder') to list its members with signatures, and/or query to find types/members whose name contains the text. Use before writing run_journal code.

Run several tool calls in order as one unit. In batch mode (no NX window) this starts NX only once, which is much faster than separate calls. Returns one result per command.

Create a new, empty millimetre part and make it the work part.

Open an existing .prt file and make it the work part.

Save the work part to its current file.

Save the work part under a new file name; the new file becomes the work part.

Close the work part. Unsaved changes are discarded unless save=true.

Create a rectangular block. origin is the corner with the smallest x/y/z; the block extends length along +X, width along +Y, height along +Z. Units: millimetres (mm) and degrees.

Create a cylinder. origin is the centre of the base circle; the cylinder grows along direction. Units: millimetres (mm) and degrees.

Create a cone or truncated cone. origin is the centre of the base circle. Units: millimetres (mm) and degrees.

Create a sphere. Units: millimetres (mm) and degrees.

Create an empty sketch on a principal plane, on an arbitrary plane, or on a planar face. Returns the sketch name used by sketch_* tools, extrude and revolve. Sketch coordinates are 2D (x, y) in the sketch plane: for XY the sketch x/y are absolute X/Y (normal +Z); for XZ they are absolute X/Z (normal -Y); for YZ they are absolute Y/Z (normal +X). The result reports origin, x_axis, y_axis and normal. Units: millimetres (mm) and degrees.

Add a straight line to a sketch.

Add a full circle to a sketch.

Add an axis-aligned rectangle (four lines) to a sketch.

Add a circular arc to a sketch, counter-clockwise from start_angle to end_angle (degrees, measured from the sketch x axis).

Extrude all curves of a sketch along the sketch normal (or direction). The curves must form closed loops to get a solid. Units: millimetres (mm) and degrees.

Revolve all curves of a sketch about an axis given in ABSOLUTE coordinates. Units: millimetres (mm) and degrees.

Drill a simple round hole into a body. position is the centre of the hole on the entry face; the hole goes along direction (pointing INTO the material). Implemented as a subtracted cylinder so the geometry is exact. Units: millimetres (mm) and degrees.

Round (fillet) edges with a constant radius. Use list_edges to find edges. Units: millimetres (mm) and degrees.

Chamfer edges with a symmetric offset. Use list_edges to find edges. Units: millimetres (mm) and degrees.

Hollow out a solid body leaving walls of the given thickness. Faces listed in remove_faces are opened. Units: millimetres (mm) and degrees.

Unite (add) tool bodies to the target body. The tools are consumed.

Subtract tool bodies from the target body. The tools are consumed.

Keep only the volume shared by the target body and the tool bodies. The tools are consumed.

List all features of the work part in timestamp order.

Delete a feature (and features that depend on it).

List the expressions (parameters) of the work part with name, value and formula.

Change an expression (parameter) and update the model. Give either a numeric value or a formula string.

Undo the last modelling steps (each modifying tool call is one step).

List the edges of a body with id, type, length, end points and mid point. Ids are valid until the body changes.

List the faces of a body with id, type, a point on the face, its normal/axis direction and bounding box.

Export the work part as a STEP file (AP214).

Export solid bodies of the work part as a binary STL file.

Save a PNG image of the NX graphics window so you can SEE the model. The MCP server returns the image itself. Only available in live mode (batch mode has no graphics window).