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build123d MCP

PYPI · BUILD123D-MCP · SCANNED SEP 20

AI-driven 3D CAD via build123d: execute, render, measure, and export geometry interactively.

Available components

pypi · build123d-mcp 34
−3 this week 34 Trust /100
Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →

Supply Chain Security90
  • No malware found by supply-chain analysis.Pass
  • CVE check failed: a known high-severity CVE affects pillow 12.2.0, reached via bd-warehouse > build123d > threejs-materials > pillow. A fixed version is available. View diagnostics → Fail
  • Runs hatchling.build at install time, a recognised native-build step with no shell scripting around it. View diagnostics → Pass
  • 23 of 107 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency35
  • Source repository is publicly reachable at the declared URL. View diagnostics → Pass
  • Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
  • License check failed: the license (Apache Software License) isn't a recognized OSI-approved license. See how to fix → Fail
  • Actively maintained (last published 15 days ago).Pass
  • Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability0
  • Schema quality not yet verified: this package could not be installed in a clean environment, so we have no schema to assess.Unverified
Stability & Change Management0
  • Stability not yet verified: this package could not be installed in a clean environment, so we have no schema to compare.Unverified
Tool Coverage0
  • Tool coverage not yet verified: this package could not be installed in a clean environment, so we have no tool definitions to assess.Unverified
Tool Safety0
  • Tool safety not yet verified: this package could not be installed in a clean environment, so we have no tool text to scan.Unverified
Capabilities0
  • Protocol version not yet verified: this package could not be installed in a clean environment, so we never saw its MCP handshake.Unverified

Unverified: 5 categories

Categories scored 0 because our sandbox run of this package has not given us the schema these checks need to read. That is a gap on our side rather than a finding about the package, and we only credit what we can confirm, so the score stands at 0 until the capture succeeds. We are working through the fleet, so this normally clears without any action from you. How we score packages →

Install

How do I install the build123d MCP server?

build123d MCP runs locally as a PyPI package, launched with uvx build123d-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

pypi · build123d-mcp

# add to Claude Code
claude mcp add pzfreo-build123d-mcp -- uvx build123d-mcp
// .cursor/mcp.json
{
  "mcpServers": {
    "pzfreo-build123d-mcp": {
      "command": "uvx",
      "args": [
        "build123d-mcp"
      ]
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "pzfreo-build123d-mcp": {
      "command": "uvx",
      "args": [
        "build123d-mcp"
      ]
    }
  }
}
# add to Codex CLI
codex mcp add pzfreo-build123d-mcp -- uvx build123d-mcp
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "pzfreo-build123d-mcp": {
      "type": "local",
      "command": [
        "uvx",
        "build123d-mcp"
      ],
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add pzfreo-build123d-mcp --command uvx --arg build123d-mcp
# ~/.hermes/config.yaml
mcp_servers:
  pzfreo-build123d-mcp:
    command: "uvx"
    args: ["build123d-mcp"]
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "pzfreo-build123d-mcp": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "build123d-mcp"
      ]
    }
  }
}
# add to Vellum
assistant mcp add pzfreo-build123d-mcp -t stdio -c uvx -a build123d-mcp
// mcp.json
{
  "mcpServers": {
    "pzfreo-build123d-mcp": {
      "command": "uvx",
      "args": [
        "build123d-mcp"
      ]
    }
  }
}
Changelog

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.

  • 20 Sept 26 −3
    • CVE-2026-59200 affects this package: high ▼ security
    • CVE-2026-54059 affects this package: high ▼ security
    • CVE-2026-59197 affects this package: high ▼ security
    • CVE-2026-59199 affects this package: high ▼ security
    • CVE-2026-55379 affects this package: high ▼ security
    • CVE-2026-54060 affects this package: high ▼ security
    • CVE-2026-59204 affects this package: high ▼ security
    • CVE-2026-59198 affects this package: high ▼ security
    • CVE-2026-59205 affects this package: high ▼ security
    • CVE-2026-55798 affects this package: high ▼ security
    • CVE-2026-54058 affects this package: high ▼ security
    • CVE-2026-55380 affects this package: high ▼ security
    • CVE-2026-59203 affects this package: high ▼ security
    • Known CVEs: pass → fail ▼ security
  • 4 Sept 26 +1
    • Security disclosure: unverified → pass ▲ functional
    • Package version: 0.3.83 → 0.3.84 functional
  • 3 Sept 26 −1
    • Security disclosure: pass → unverified ▼ functional
  • 29 Aug 26 0
    • Stability: Stability not yet verified: this package could not be installed in a clean environment, so we have no schema to compare. security
    • Tool safety: Tool safety not yet verified: this package could not be installed in a clean environment, so we have no tool text to scan. security
    • Schema quality: Schema quality not yet verified: this package could not be installed in a clean environment, so we have no schema to assess. functional
    • Capabilities: Protocol version not yet verified: this package could not be installed in a clean environment, so we never saw its MCP handshake. functional
    • Tool coverage: Tool coverage not yet verified: this package could not be installed in a clean environment, so we have no tool definitions to assess. functional
  • 28 Aug 26 0
    • Tool safety: Tool safety not yet verified: we do not have a sandbox capture of the tool definitions this version of the package serves yet. security
    • Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. security
    • Capabilities: Protocol version not yet verified: we do not have a sandbox capture of the MCP handshake this version of the package performs yet. functional
    • Tool coverage: Tool coverage not yet verified: we do not have a sandbox capture of the tool definitions this version of the package serves yet. functional
    • Schema quality: Schema quality not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet. functional
    • Package version: 0.3.82 → 0.3.83 functional
  • 26 Aug 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 18 Aug 26 0
    • Security disclosure: unverified → pass ▲ functional
  • 17 Aug 26 0
    • Security disclosure: pass → unverified ▼ functional
Diagnostics

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 20 Sept 2026 · Analysed pypi/build123d-mcp@0.3.84

Provenance No attestation

The registry publishes no build provenance for this version, so there is nothing to verify.

Result No attestation
Ecosystem pypi

Background: How many MCP packages publish verified provenance →

Install scripts 1 script
Hook Tier Command
build_backend allowlisted hatchling.build

Background: Why install scripts are a supply-chain risk →

Vulnerabilities 26 findings
ID CVE Severity Vector Fix available
GHSA-45hq-cxwh-f6vc CVE-2026-55379 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
GHSA-4x4j-2g7c-83w6 CVE-2026-55798 medium CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L yes
GHSA-5x94-69rx-g8h2 CVE-2026-54060 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
GHSA-62p4-gmf7-7g93 CVE-2026-54058 high yes
GHSA-6r8x-57c9-28j4 CVE-2026-59199 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
GHSA-8v84-f9pq-wr9x CVE-2026-54059 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
GHSA-9hw9-ch79-4vh6 CVE-2026-59205 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
GHSA-fj7v-r99m-22gq CVE-2026-59198 medium CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L yes
GHSA-jjj6-mw9f-p565 CVE-2026-59200 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
GHSA-pg7v-jwj7-p798 CVE-2026-59203 medium CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L yes
GHSA-phj9-mv4w-65pm CVE-2026-55380 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
GHSA-vjc4-5qp5-m44j CVE-2026-59204 high yes
GHSA-xj96-63gp-2gmr CVE-2026-59197 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H yes
PYSEC-2026-2253 CVE-2026-54059 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
PYSEC-2026-2254 CVE-2026-54060 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
PYSEC-2026-2255 CVE-2026-55379 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
PYSEC-2026-2256 CVE-2026-55380 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
PYSEC-2026-2257 CVE-2026-55798 medium CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L yes
PYSEC-2026-3451 CVE-2026-59199 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
PYSEC-2026-3452 CVE-2026-59203 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
PYSEC-2026-3453 CVE-2026-59205 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
PYSEC-2026-3454 CVE-2026-59197 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H yes
PYSEC-2026-3493 CVE-2026-54058 none yes
PYSEC-2026-3494 CVE-2026-59198 medium CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L yes
PYSEC-2026-3495 CVE-2026-59200 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H yes
PYSEC-2026-3496 CVE-2026-59204 none yes

Background: What a vulnerability scan can and cannot prove →

Dependencies 107 packages
Packages resolved 107
Stale 15
No linked repository 8
Tree resolution Complete

Background: SBOMs and build attestations, explained →

MCP tools

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 →

Tools for package channels are captured by running the package in an isolated sandbox. The most recent sandbox run could not capture a tool list from this package.

Common questions

What is the build123d MCP server?

build123d MCP is listed in the public MCP registry as io.github.pzfreo/build123d-mcp. AI-driven 3D CAD via build123d: execute, render, measure, and export geometry interactively. This page covers its PyPI package (build123d-mcp).

Is the build123d MCP server safe to use?

build123d MCP scores 34 out of 100 on VerifyMCP. We recorded 26 known advisories against it as of 20 September 2026. 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.

Is the build123d MCP server still maintained?

build123d MCP is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.