kernelcad

Fetch Part

fetch_part

Read-only

Fetch one bundled catalog part. Prefer await lib.standard.nema17() and await lib.standard.bearing608() — they are offline and do not download remote STEP. A lookup that cannot finish fails within 45s with errorCode parts.lookup.timeout. Do not retry in parallel.

Input Schema

TableJSON Schema

Name	Required	Description
`id`	No
`query`	No
`family`	No
`category`	No
`standard`	No
`partsBaseUrl`	No	Opt-in remote endpoint; no default value ships with kernelCAD.

Output Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 11, 2026

removedOutput schema / properties

Removed value: -{
-  "cachePath": {
-    "description": "Local cache path of the written STEP file (success).",
-    "type": "string"
-  },
-  "disclosure": {
-    "description": "Referral disclosure. Present only when url carries a referral tag; show it with the link.",
-    "type": "string"
-  },
-  "error": {
-    "type": "string"
-  },
-  "errorCode": {
-    "type": "string"
-  },
-  "errorHint": {
-    "type": "string"
-  },
-  "instruction": {
-    "description": "What to do with the link_out URL.",
-    "type": "string"
-  },
-  "kind": {
-    "description": "'link_out' when the URL is a vendor configurator the agent must drive by hand.",
-    "type": "string"
-  },
-  "ok": {
-    "type": "boolean"
-  },
-  "record": {
-    "additionalProperties": true,
-    "description": "Resolved part record (success).",
-    "type": "object"
-  },
-  "sha256": {
-    "description": "SHA-256 fingerprint of the STEP file (success).",
-    "type": "string"
-  },
-  "source": {
-    "description": "Where the part came from ('local' | 'remote') (success).",
-    "type": "string"
-  },
-  "url": {
-    "description": "Outbound vendor URL (link_out). May carry a referral tag; see disclosure.",
-    "type": "string"
-  }
-}

removedOutput schema / required
```
Removed value: -[
-  "ok"
-]
```

Changed4 schema fields changedSep 28, 2026

addedOutput schema / properties / disclosure

Added value: +{
+  "description": "Referral disclosure. Present only when url carries a referral tag; show it with the link.",
+  "type": "string"
+}

addedOutput schema / properties / instruction

Added value: +{
+  "description": "What to do with the link_out URL.",
+  "type": "string"
+}

addedOutput schema / properties / kind

Added value: +{
+  "description": "'link_out' when the URL is a vendor configurator the agent must drive by hand.",
+  "type": "string"
+}

addedOutput schema / properties / url

Added value: +{
+  "description": "Outbound vendor URL (link_out). May carry a referral tag; see disclosure.",
+  "type": "string"
+}

Changed1 schema field changedJun 15, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "properties": {
+    "cachePath": {
+      "description": "Local cache path of the written STEP file (success).",
+      "type": "string"
+    },
+    "error": {
+      "type": "string"
+    },
+    "errorCode": {
+      "type": "string"
+    },
+    "errorHint": {
+      "type": "string"
+    },
+    "ok": {
+      "type": "boolean"
+    },
+    "record": {
+      "additionalProperties": true,
+      "description": "Resolved part record (success).",
+      "type": "object"
+    },
+    "sha256": {
+      "description": "SHA-256 fingerprint of the STEP file (success).",
+      "type": "string"
+    },
+    "source": {
+      "description": "Where the part came from ('local' | 'remote') (success).",
+      "type": "string"
+    }
+  },
+  "required": [
+    "ok"
+  ],
+  "type": "object"
+}

AddedJun 8, 2026

TDQS

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