kernelCAD
REMOTE · MCP.KERNELCAD.COM
CAD in ChatGPT and Claude: editable parts, STEP/STL/drawings, in-chat 3D, automatic checks.
Available components
Last scanned (5 hours ago)
Scores higher than 76% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Developer Tools
Recent critical change
Authorization (21 Oct 2026). See the changelog before you install this server.
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (remove_feature). See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability71
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 40454 tokens (~512/item across 79 items; 77 tools + 2 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage99
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 95% of tool parameters carry a description.Partial
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- All 3 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
- An AI judge read all 79 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
- Supports UI / widget rendering.Pass
Checks we ran (14)
- TLS certificate
- Authorization
- HTTPS
- HSTS header
- DNSSEC
- Transport
- Schema quality
- Stability
- Tool coverage
- Injection markers
- Destructive annotations
- Judged manipulation
- MCP protocol
- Capabilities
Does not apply to this hosted endpoint (2)
- Supply Chain SecurityScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
- Provenance & TransparencyScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
The score does not measure everything. What the score does not measure →
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 5 Nov 26 +1
- Stability: 0.97 → pass security
- Tool “get_asset” rewrote its description, which is the text the model reads security
- Tool “search_assets” rewrote its description, which is the text the model reads security
- “search_assets” added an optional parameter “source” cosmetic
- 4 Nov 26 −1
- The server rewrote its instructions, which are the text every model session reads security
- Tool “fab_pack” rewrote its description, which is the text the model reads security
- Stability: pass → 0.97 functional
- New tool “get_asset” functional
- New tool “get_asset_pack” functional
- New tool “search_assets” functional
- “fab_pack” reworded the description of “scope” cosmetic
- 3 Nov 26 0
- “write_bom” reworded the description of “handoff_path” cosmetic
- “write_bom” reworded the description of “catalog_parts” cosmetic
- “write_bom” reworded the description of “handoff” cosmetic
- “write_bom” reworded the description of “handoff_json” cosmetic
4 cosmetic changes on this day. Switch on “Show cosmetic changes” to see them.
- 2 Nov 26 0
- Tool “evaluate_script” rewrote its description, which is the text the model reads security
- Tool “open_in_studio” rewrote its description, which is the text the model reads security
- Tool “render_preview” rewrote its description, which is the text the model reads security
- Tool “review_cad” rewrote its description, which is the text the model reads security
- 1 Nov 26 0
- Resource “kernelcad-studio-viewer” now points somewhere else: ui://kernelcad/studio-viewer-v8.html → ui://kernelcad/studio-viewer-v9.html security
- Tool “open_in_studio” rewrote its description, which is the text the model reads security
- New tool “estimate_assembly_manufacturing” functional
- New tool “request_assembly_quote” functional
- New tool “report_need” functional
- “set_param” reworded the description of “new_value” cosmetic
- 30 Oct 26 0
- Tool “export” rewrote its description, which is the text the model reads security
- “export” reworded the description of “no_verify” cosmetic
- “export” reworded the description of “options” cosmetic
- 29 Oct 26 +1
- Stability: 0.97 → pass security
- 28 Oct 26 −1
- Stability: pass → 0.97 functional
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://mcp.kernelcad.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_256_GCM_SHA384 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=api.kernelcad.com | CN=YE2,O=Let's Encrypt,C=US | 25 Sept 2026 | 24 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 67ab176a1f5fbb983220c16adf17cffbd90 |
| SANs: api.kernelcad.com, mcp.kernelcad.com | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.kernelcad.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | Trust anchor | 20326, 38696 | 8, 8 | Verified |
| com. | DS published | 19718 | 13 | Verified |
| kernelcad.com. | No DS | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.kernelcad.com/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.kernelcad.com/mcp | HTTPS enforced | 301 | https://mcp.kernelcad.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
write_bom Write Bill of Materials ~240
Use this to merge a supplied handoff BOM with optional KernelCAD catalog parts, MPNs and pricing, write a local CSV, and return Sheets-ready rows. Pass exactly one of handoff, handoff_json or handoff_path. The default output is a new file under artifacts/bom; an explicit output_path selects another allowed destination. Existing files are preserved unless overwrite:true, which replaces the destination. This tool makes no Google API calls.
| Name | Type | Req | Description |
|---|---|---|---|
| catalog_parts | array | – | Optional catalog entries matched by ref or catalog id; unmatched entries become additional rows. |
| handoff | object | – | BOM handoff object. Supply exactly one handoff source. |
| handoff_json | string | – | JSON text containing a handoff object with parts; use instead of handoff or handoff_path. |
| handoff_path | string | – | Path to a handoff JSON file; use instead of handoff or handoff_json. |
| output_path | string | – | Optional CSV destination. Defaults to artifacts/bom/bom-<id>.csv. |
| overwrite | boolean | – | Set true to replace an existing CSV destination. Existing files are otherwise preserved. |
Structured output declared, but exposes no named fields.
No examples provided.
How do I install the kernelCAD MCP server?
kernelCAD is a hosted endpoint at https://mcp.kernelcad.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · mcp.kernelcad.com
claude mcp add --transport http com-kernelcad-kernelcad 'https://mcp.kernelcad.com/mcp'
What is the kernelCAD MCP server?
kernelCAD is an MCP server listed in the public MCP registry as com.kernelcad/kernelcad. CAD in ChatGPT and Claude: editable parts, STEP/STL/drawings, in-chat 3D, automatic checks. This page covers its hosted endpoint (https://mcp.kernelcad.com/mcp).
Is the kernelCAD MCP server safe to use?
kernelCAD scores 78 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the kernelCAD MCP server expose?
kernelCAD exposes 77 tools: review_paint_peek_latest, open_in_studio, get_project, get_project_revision, get_latest_render, and 72 more. Their descriptions and schemas cost roughly 40,366 tokens of context every time the server is loaded.
Does the kernelCAD MCP server require authentication?
No. We connected to kernelCAD without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the kernelCAD MCP server still maintained?
kernelCAD is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What did VerifyMCP test on the kernelCAD MCP server?
VerifyMCP ran 14 checks on kernelCAD, covering TLS certificate, Authorization, HTTPS, HSTS header and 10 more. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.