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First seen 2026-11-05 · Last seen 2026-11-05 · Source: webmcp.com

Answer 12 · Act 47 · Transact 1 · Score: Not yet scored

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cad.connect_parts

act imperative

Atomically connect two live parts through measured ports. Resolves both world frames, moves only the target body into contact, creates paired interface geometry, persists the assembly graph edge, and rolls back the entire call if any step fails. Use this instead of mixing mate_parts with add_connector for one interface; groups are organizational and do not replace a connection.

Page: /editor

Input schema

Property	Type	Required	Description
`sourcePartId`	string	yes	Exact live ID or explicit result alias (for example "$base") of the fixed/source part. Do not use prototype, last_created, or a display name.
`sourcePort`	object	yes	Measured source port: {face, localPointMm?, localNormal?, localTangentUMm?}; a face string is accepted for simple planar ports.
`targetPartId`	string	yes	Exact live ID or explicit result alias (for example "$lid") of the moving/target part. Do not use prototype, last_created, or a display name.
`targetPort`	object	yes	Measured target port: {face, localPointMm?, localNormal?, localTangentUMm?}; a face string is accepted for simple planar ports.
`connectionType`	string	yes	Atomic interface contract.
`clearanceMm`	number	no	Manufacturing clearance in millimeters.
`engagementMm`	number	no	Insertion/overlap engagement in millimeters.
`sizeMm`	number	no	Nominal connector or shaft size in millimeters.
`fit`	string	no	FDM fit class.
`motion`	object	no	Optional motion constraint, for example {type:"revolute", axis:"X", limitsDeg:[0,120]}.
`manufacturingProcess`	string	no	Process used to derive clearance.

Raw JSON schema

{
  "type": "object",
  "title": "connect parts",
  "description": "Arguments for connect_parts.",
  "properties": {
    "sourcePartId": {
      "type": "string",
      "description": "Exact live ID or explicit result alias (for example \"$base\") of the fixed/source part. Do not use prototype, last_created, or a display name."
    },
    "sourcePort": {
      "type": "object",
      "description": "Measured source port: {face, localPointMm?, localNormal?, localTangentUMm?}; a face string is accepted for simple planar ports.",
      "additionalProperties": true
    },
    "targetPartId": {
      "type": "string",
      "description": "Exact live ID or explicit result alias (for example \"$lid\") of the moving/target part. Do not use prototype, last_created, or a display name."
    },
    "targetPort": {
      "type": "object",
      "description": "Measured target port: {face, localPointMm?, localNormal?, localTangentUMm?}; a face string is accepted for simple planar ports.",
      "additionalProperties": true
    },
    "connectionType": {
      "type": "string",
      "description": "Atomic interface contract.",
      "enum": [
        "fixed_mount",
        "shaft_bushing",
        "revolute",
        "peg_socket",
        "snap_fit",
        "screw_boss",
        "magnet",
        "pin_hinge"
      ]
    },
    "clearanceMm": {
      "type": "number",
      "description": "Manufacturing clearance in millimeters.",
      "default": 0.2
    },
    "engagementMm": {
      "type": "number",
      "description": "Insertion/overlap engagement in millimeters.",
      "default": 3
    },
    "sizeMm": {
      "type": "number",
      "description": "Nominal connector or shaft size in millimeters.",
      "default": 5
    },
    "fit": {
      "type": "string",
      "description": "FDM fit class.",
      "enum": [
        "tight",
        "normal",
        "loose"
      ],
      "default": "normal"
    },
    "motion": {
      "type": "object",
      "description": "Optional motion constraint, for example {type:\"revolute\", axis:\"X\", limitsDeg:[0,120]}.",
      "additionalProperties": true
    },
    "manufacturingProcess": {
      "type": "string",
      "description": "Process used to derive clearance.",
      "enum": [
        "fdm",
        "sla",
        "sls",
        "cnc",
        "injection_molding"
      ],
      "default": "fdm"
    }
  },
  "required": [
    "sourcePartId",
    "sourcePort",
    "targetPartId",
    "targetPort",
    "connectionType"
  ],
  "additionalProperties": false
}