# @pensketch/mcp

An MCP server for pensketch: check, render and rasterise hand-sketched diagrams.

- **Type:** MCP server
- **Trust:** 85/100 (A), scored on the package rubric
- **Verification:** verified (build provenance)
- **Version:** 0.13.0
- **Author:** io.github.alpha-nu
- **License:** MIT
- **npm:** @pensketch/mcp
- **Source:** https://github.com/alpha-nu/pensketch
- **Compatible clients:** claude-code, cursor, copilot, gemini (basis: transport)

## Trust

85/100 (A), scored on the package rubric
- Publisher verified: no
- Build provenance: verified attestation
- npm trusted publishing (OIDC): yes
- Install scripts: nothing suspicious found
- Prompt-injection scan: not run
- Obfuscation scan: not run
- Evidence age: 1 day

## Security scan

- **Status:** clean
- **Scanned:** 2026-09-16T11:26:57.723Z
- **Version scanned:** 0.13.0
- **CVEs:** none found by OSV at scan time

## Tools

4 declared. Statically extracted from the shipped source — a floor on the surface, not a census.
- `render_png`
- `check_diagram`
- `render_diagram`
- `get_schema` — Returns the JSON Schema for the diagram the drawing tools take: every field of a node, an edge, a brace and a note, with what each means. The same document as t

## Install

**Verdict: install** — No blocking findings and no open coverage gaps — safe to install as configured.
**Config** (claude-code):
```json
"{\n  \"mcpServers\": {\n    \"mcp\": {\n      \"command\": \"npx\",\n      \"args\": [\n        \"-y\",\n        \"@pensketch/mcp\"\n      ]\n    }\n  }\n}"
```

## Blast radius

Contained to moderate — no credential declaration found, from the publisher, the upstream registry, or the README. Known so far: runs on your machine; read-only tool surface.
- Floor 12, ceiling 30 (tier: unknown)
- `unknown` means the floor and ceiling land in different bands — not measured enough to name one. It does not mean low.
- This is impact, not likelihood. A high radius is not a defect: a filesystem server is supposed to write files. It is never part of the trust score.

## Machine-readable views of this entry

- Signed JSON: https://forgeregistry.com/api/v1/packages/%40pensketch%2Fmcp
- Install plan: https://forgeregistry.com/api/v1/packages/%40pensketch%2Fmcp/install-plan
- Alternatives: https://forgeregistry.com/api/v1/alternatives/%40pensketch%2Fmcp
- HTML page: https://forgeregistry.com/registry/%40pensketch%2Fmcp
- MCP: POST https://forgeregistry.com/api/mcp → `forge_get_package` / `forge_install_plan`

## About this document

Generated by Forge (https://forgeregistry.com) — a compact rendering of the same record served, signed, at the JSON URL above. Trust and scan facts are the registry's own measurements; anything Forge did not measure is named as unmeasured rather than omitted.