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vcad Create 3D CAD models using vcad MCP tools. Use when the user asks to create 3D parts, mechanical components, enclosures, brackets, gears, or any parametric geometry. Supports primitives, sketch-based operations (extrude, revolve, sweep, loft), booleans, patterns, fillets, shell, assemblies, and export to STL/GLB.
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Installer avec Codex ou Claude Copiez ce prompt, collez-le dans Codex, Claude ou un autre assistant, puis laissez-le vérifier la page du skill et l'installer pour vous.
Afficher les détails du prompt Une commande directe contourne le prompt de vérification. Examinez la source avant de l'exécuter.
npx skills add https://github.com/ecto/vcad --skill vcadLa commande reste sur une seule ligne. Faites défiler horizontalement pour la vérifier avant de la copier.
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Télécharger Zip Téléchargement... Create 3D CAD models using vcad MCP tools. Use when the user asks to create 3D parts, mechanical components, plates with holes, brackets, or any parametric geometry. Supports primitives (cube, cylinder, sphere, cone), boolean operations, transforms, patterns, and export to STL/GLB.
Métiers associés SOC
Basé sur la classification professionnelle SOC
name vcad description Create 3D CAD models using vcad MCP tools. Use when the user asks to create 3D parts, mechanical components, enclosures, brackets, gears, or any parametric geometry. Supports primitives, sketch-based operations (extrude, revolve, sweep, loft), booleans, patterns, fillets, shell, assemblies, and export to STL/GLB.
vcad - Parametric CAD for AI Agents
Create 3D CAD models programmatically using the vcad MCP tools. All dimensions are in millimeters.
Available Tools
Tool Purpose create_cad_documentBuild geometry from primitives, sketches, and operations export_cadExport to STL (3D printing) or GLB (visualization) inspect_cadGet volume, surface area, bounding box, center of mass, mass import_stepImport geometry from STEP files open_in_browserGenerate shareable vcad.io URL get_changelogQuery recent changes and features
For assembly and physics tools, see the assembly-physics skill.
Output Format
Use "format": "vcode" (default) for token-efficient output (~5x smaller). Use "format": "json" for human-readable debugging.
Part Types
Each part must use exactly ONE base geometry type:
Primitive-based
{
"name" : "plate" ,
"primitive"
:
{
"type"
:
"cube"
,
"size"
:
{
"x"
:
100
,
"y"
:
60
,
"z"
:
5
}
}
,
"operations"
:
[
]
}
Extrude-based (sketch → solid) {
"name" : "bracket" ,
"extrude" : {
"sketch" : {
"plane" : "xy" ,
"shape" : { "type" : "rectangle" , "width" : 40 , "height" : 20 , "centered" : true }
} ,
"height" : 10
}
}
Revolve-based (sketch → solid of revolution) {
"name" : "vase" ,
"revolve" : {
"sketch" : {
"plane" : "xy" ,
"shape" : {
"type" : "polygon" ,
"points" : [
{ "x" : 10 , "y" : 0 } , { "x" : 15 , "y" : 20 } ,
{ "x" : 12 , "y" : 40 } , { "x" : 14 , "y" : 50 } ,
{ "x" : 0 , "y" : 50 } , { "x" : 0 , "y" : 0 }
]
}
} ,
"axis" : "y" ,
"angle_deg" : 360
}
}
Sweep-based (sketch along path) {
"name" : "tube" ,
"sweep" : {
"sketch" : {
"shape" : { "type" : "circle" , "radius" : 5 }
} ,
"path" : { "type" : "line" , "start" : { "x" : 0 , "y" : 0 , "z" : 0 } , "end" : { "x" : 50 , "y" : 0 , "z" : 30 } }
}
}
Helix path for springs/threads:
"path" : { "type" : "helix" , "radius" : 20 , "pitch" : 10 , "height" : 60 }
Optional sweep parameters: twist_deg, scale_start, scale_end.
Loft-based (interpolate between sketches) {
"name" : "transition" ,
"loft" : {
"sketches" : [
{ "plane" : "xy" , "at" : { "x" : 0 , "y" : 0 , "z" : 0 } , "shape" : { "type" : "rectangle" , "width" : 40 , "height" : 40 , "centered" : true } } ,
{ "plane" : "xy" , "at" : { "x" : 0 , "y" : 0 , "z" : 30 } , "shape" : { "type" : "circle" , "radius" : 15 } }
]
}
}
Sketch Shapes Sketches are used by extrude, revolve, sweep, and loft operations:
Shape Parameters rectanglewidth, height, centered (bool, default false)circleradiuspolygonpoints (array of {x, y}), closed (default true)
Sketch planes: "xy" (default), "xz", "yz". Origin set with "at": {x, y, z}.
Primitive Origins Primitive Origin Extent Cube Corner at (0,0,0) Extends to (size.x, size.y, size.z) Cylinder Base center at (0,0,0) Height along +Z Sphere Center at (0,0,0) Radius in all directions Cone Base center at (0,0,0) Height along +Z, radius_bottom/radius_top
Positioning The at parameter for boolean operations and holes:
Absolute : {"x": 25, "y": 15, "z": 0} — exact coordinates in mmNamed : "center", "top-center", "bottom-center" — relative to base primitivePercentage : {"x": "50%", "y": "50%"} — percentage of base primitive bounds
Operations Applied in order after the base geometry:
Operation Key Parameters unionprimitive, atdifferenceprimitive, atintersectionprimitive, atholediameter, at, depth (omit for through-hole)translateoffset: {x, y, z}rotateangles: {x, y, z} (degrees)scalefactor: {x, y, z}linear_patterndirection: {x, y, z}, count, spacingcircular_patternaxis_origin, axis_dir, count, angle_degfilletradius — rounds all edgeschamferdistance — bevels all edgesshellthickness — hollows the part
Materials Assign via "material" on each part: "steel" (density 7850), "aluminum" (2700), "default".
inspect_cad reports mass when density is available.
Common Patterns
Plate with Corner Holes {
"parts" : [ {
"name" : "mounting_plate" ,
"primitive" : { "type" : "cube" , "size" : { "x" : 100 , "y" : 60 , "z" : 5 } } ,
"operations" : [
{ "type" : "hole" , "diameter" : 4 , "at" : { "x" : 10 , "y" : 10 } } ,
{ "type" : "hole" , "diameter" : 4 , "at" : { "x" : 90 , "y" : 10 } } ,
{ "type" : "hole" , "diameter" : 4 , "at" : { "x" : 10 , "y" : 50 } } ,
{ "type" : "hole" , "diameter" : 4 , "at" : { "x" : 90 , "y" : 50 } }
]
} ]
}
Cylinder with Blind Hole {
"parts" : [ {
"name" : "bushing" ,
"primitive" : { "type" : "cylinder" , "radius" : 15 , "height" : 20 } ,
"operations" : [
{ "type" : "hole" , "diameter" : 10 , "depth" : 15 , "at" : "center" }
]
} ]
}
L-Bracket {
"parts" : [ {
"name" : "bracket" ,
"primitive" : { "type" : "cube" , "size" : { "x" : 40 , "y" : 40 , "z" : 5 } } ,
"operations" : [
{ "type" : "union" , "primitive" : { "type" : "cube" , "size" : { "x" : 5 , "y" : 40 , "z" : 30 } } , "at" : { "x" : 0 , "y" : 0 , "z" : 5 } } ,
{ "type" : "hole" , "diameter" : 5 , "at" : { "x" : 20 , "y" : 20 } } ,
{ "type" : "difference" , "primitive" : { "type" : "cylinder" , "radius" : 2.5 , "height" : 40 } , "at" : { "x" : 2.5 , "y" : 20 , "z" : 20 } }
]
} ]
}
Flange with Circular Bolt Pattern {
"parts" : [ {
"name" : "flange" ,
"primitive" : { "type" : "cylinder" , "radius" : 40 , "height" : 10 } ,
"operations" : [
{ "type" : "hole" , "diameter" : 20 , "at" : "center" } ,
{ "type" : "difference" , "primitive" : { "type" : "cylinder" , "radius" : 4 , "height" : 15 } , "at" : { "x" : 30 , "y" : 0 , "z" : -2 } } ,
{ "type" : "circular_pattern" , "axis_origin" : { "x" : 0 , "y" : 0 , "z" : 0 } , "axis_dir" : { "x" : 0 , "y" : 0 , "z" : 1 } , "count" : 6 , "angle_deg" : 360 }
]
} ]
}
Linear Pattern of Holes {
"parts" : [ {
"name" : "rail" ,
"primitive" : { "type" : "cube" , "size" : { "x" : 200 , "y" : 20 , "z" : 10 } } ,
"operations" : [
{ "type" : "difference" , "primitive" : { "type" : "cylinder" , "radius" : 3 , "height" : 15 } , "at" : { "x" : 20 , "y" : 10 , "z" : -2 } } ,
{ "type" : "linear_pattern" , "direction" : { "x" : 1 , "y" : 0 , "z" : 0 } , "count" : 5 , "spacing" : 40 }
]
} ]
}
Extruded T-Profile {
"parts" : [ {
"name" : "t_beam" ,
"extrude" : {
"sketch" : {
"plane" : "xz" ,
"shape" : {
"type" : "polygon" ,
"points" : [
{ "x" : -25 , "y" : 0 } , { "x" : 25 , "y" : 0 } ,
{ "x" : 25 , "y" : 3 } , { "x" : 3 , "y" : 3 } ,
{ "x" : 3 , "y" : 30 } , { "x" : -3 , "y" : 30 } ,
{ "x" : -3 , "y" : 3 } , { "x" : -25 , "y" : 3 }
]
}
} ,
"height" : 100
}
} ]
}
Shelled Box (Enclosure) {
"parts" : [ {
"name" : "enclosure" ,
"primitive" : { "type" : "cube" , "size" : { "x" : 80 , "y" : 60 , "z" : 40 } } ,
"operations" : [
{ "type" : "shell" , "thickness" : 2 }
]
} ]
}
Filleted Part {
"parts" : [ {
"name" : "rounded_block" ,
"primitive" : { "type" : "cube" , "size" : { "x" : 30 , "y" : 20 , "z" : 15 } } ,
"operations" : [
{ "type" : "fillet" , "radius" : 2 }
]
} ]
}
Spring (Helix Sweep) {
"parts" : [ {
"name" : "spring" ,
"sweep" : {
"sketch" : { "shape" : { "type" : "circle" , "radius" : 1.5 } } ,
"path" : { "type" : "helix" , "radius" : 10 , "pitch" : 8 , "height" : 40 }
} ,
"material" : "steel"
} ]
}
Workflow
Create — create_cad_document to build geometryInspect — inspect_cad to verify dimensions, volume, and massExport — export_cad to save as .stl or .glbShare — open_in_browser to generate a vcad.io URL
Tips
Holes default to through-holes; specify depth for blind holes
Use percentage positioning for parametric designs that scale
Cube origin is at corner — add half-size to center operations
Cylinder/cone origins are at base center — no X/Y offset needed for centered holes
Always extend cutting cylinders past the part (the hole operation does this automatically)
fillet and chamfer apply to all edges — use them as the last operationshell hollows the entire part — combine with difference to remove specific facesFor multi-part designs, define each part in the parts array with a unique name
Use "format": "vcode" (default) to save tokens in the response
