# io.github.vince-gonzalez/cvdsafe (npm · cvdsafe-mcp)

Check if a palette or image is colorblind-safe, generate safe palettes, check WCAG contrast.

- Trust score: 79/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- npm · `cvdsafe-mcp`: 79/100 (this document), [markdown](https://verifymcp.io/servers/vince-gonzalez-cvdsafe/cvdsafe-mcp.md), [page](https://verifymcp.io/servers/vince-gonzalez-cvdsafe/cvdsafe-mcp)

## Channel facts

- Registry: `npm`
- Package: `cvdsafe-mcp`
- Version: `0.2.0`
- Transport: `stdio`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-20.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 33 of 100 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 17 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 77/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 756 tokens (~126/item across 6 items; 6 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 60/100
  - Stability observed for 18 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the io.github.vince-gonzalez/cvdsafe MCP server?

io.github.vince-gonzalez/cvdsafe runs locally as an npm package, launched with npx -y cvdsafe-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add vince-gonzalez-cvdsafe -- npx -y cvdsafe-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "vince-gonzalez-cvdsafe": {
      "command": "npx",
      "args": [
        "-y",
        "cvdsafe-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "vince-gonzalez-cvdsafe": {
      "command": "npx",
      "args": [
        "-y",
        "cvdsafe-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add vince-gonzalez-cvdsafe -- npx -y cvdsafe-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "vince-gonzalez-cvdsafe": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "cvdsafe-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add vince-gonzalez-cvdsafe --command npx --arg -y --arg cvdsafe-mcp
```

### Hermes

```yaml
mcp_servers:
  vince-gonzalez-cvdsafe:
    command: "npx"
    args: ["-y", "cvdsafe-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "vince-gonzalez-cvdsafe": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "cvdsafe-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add vince-gonzalez-cvdsafe -t stdio -c npx -a -y cvdsafe-mcp
```

### Other

```json
{
  "mcpServers": {
    "vince-gonzalez-cvdsafe": {
      "command": "npx",
      "args": [
        "-y",
        "cvdsafe-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-20 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-18 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-12 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-10 (score 74, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-09-03 (score 70, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-09-02 (score 55)

First indexed and scored.

## MCP tools (6)

### `checkPalette` (~103 tokens)

Check a color palette for colorblind-safety

Check whether a set of colors stays distinguishable for people with color-vision deficiency (colorblindness). Simulates protanopia, deuteranopia and tritanopia and flags the pairs whose perceptual difference collapses under simulation. A screening aid, not a legal accessibility (ADA/WCAG) audit.

Input parameters:

- `colors` (array, required): Hex colors to check together, e.g. ["#d7191c","#1a9641","#2166ac"]

### `simulateColor` (~65 tokens)

Simulate a color under colorblindness

Return how a single hex color appears to someone with a given type of color blindness (protan, deutan, or tritan).

Input parameters:

- `color` (string, required): Hex color, e.g. #d7191c
- `type` (string, required): Color-vision deficiency type

### `fixPalette` (~97 tokens)

Fix a palette to be colorblind-safe

Take a set of colors that fails the colorblind-safety check and return an adjusted set that passes, staying as close to the originals as possible. Conflicting colors are separated in lightness (the axis color-vision deficiency preserves). Returns the new colors, how far each moved, and whether it fully passes.

Input parameters:

- `colors` (array, required): Hex colors to fix, e.g. ["#d7191c","#1a9641"]

### `checkContrast` (~131 tokens)

Check text/background contrast against WCAG

Check whether a foreground color is legible on a background color per WCAG 2.x contrast ratios. Returns the ratio (1-21) and whether it passes AA and AAA. Set large=true for text >=18pt (or 14pt bold). This is the legibility axis, separate from color-blindness.

Input parameters:

- `background` (string, required): Background hex color, e.g. #ffffff
- `foreground` (string, required): Text/foreground hex color, e.g. #767676
- `large` (boolean): True if text is >=18pt or 14pt bold (default false)

### `checkImage` (~265 tokens)

Check an image for colorblind-safety

Check whether the colors in an image, chart, screenshot or mockup stay distinguishable for people with color-vision deficiency. Extracts the image's dominant colors, simulates protanopia, deuteranopia and tritanopia, and flags the color pairs that collapse into each other — each with how much of the image's area those colors cover, so a conflict between two large regions ranks above one between two specks. Reads PNG and JPEG. Pass `path` for a local file, or a base64 `dataUri`. Set returnSimulated=true to also get back the image as a deuteranope sees it. A screening aid, not a legal (ADA/WCAG) audit.

Input parameters:

- `dataUri` (string): Base64 data URI of the image, if you don't have a file path
- `maxColors` (integer): How many dominant colors to extract and test (default 12)
- `path` (string): Path to a local PNG or JPEG file, e.g. ./dashboard.png
- `returnSimulated` (boolean): Also return the image recolored as a deuteranope sees it (default false)
- `simulateType` (string): Which deficiency to render when returnSimulated is set (default deutan)

### `generateSafePalette` (~95 tokens)

Generate a colorblind-safe palette

Return N colorblind-safe hex colors — distinct to each other under protanopia, deuteranopia and tritanopia. Seeded with the Okabe-Ito palette and safely extended above eight. Use when asked for accessible / colorblind-safe / colorblind-friendly colors for a chart, plot, map or UI. Never returns an unsafe color.

Input parameters:

- `count` (integer, required): How many colorblind-safe colors to return

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/vince-gonzalez-cvdsafe/cvdsafe-mcp#diagnostics

## Score history

- 2026-09-20: 79
- 2026-09-19: 78
- 2026-09-18: 78
- 2026-09-17: 77
- 2026-09-16: 77
- 2026-09-15: 76
- 2026-09-14: 76
- 2026-09-13: 75
- 2026-09-12: 75
- 2026-09-11: 74
- 2026-09-10: 74
- 2026-09-09: 70
- 2026-09-08: 70
- 2026-09-07: 70
- 2026-09-06: 70
- 2026-09-05: 70
- 2026-09-04: 70
- 2026-09-03: 70
- 2026-09-02: 55

## Common questions

### What is the io.github.vince-gonzalez/cvdsafe MCP server?

io.github.vince-gonzalez/cvdsafe is an MCP server listed in the public MCP registry as io.github.vince-gonzalez/cvdsafe. Check if a palette or image is colorblind-safe, generate safe palettes, check WCAG contrast. This page covers its npm package (cvdsafe-mcp).

### Is the io.github.vince-gonzalez/cvdsafe MCP server safe to use?

io.github.vince-gonzalez/cvdsafe scores 79 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. 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 io.github.vince-gonzalez/cvdsafe MCP server expose?

io.github.vince-gonzalez/cvdsafe exposes 6 tools: checkPalette, simulateColor, fixPalette, checkContrast, checkImage, generateSafePalette. Their descriptions and schemas cost roughly 756 tokens of context every time the server is loaded.

### Is the io.github.vince-gonzalez/cvdsafe MCP server still maintained?

io.github.vince-gonzalez/cvdsafe 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.

### What licence is the io.github.vince-gonzalez/cvdsafe MCP server under?

io.github.vince-gonzalez/cvdsafe declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/cvdsafe-mcp
- Socket report: https://socket.dev/npm/package/cvdsafe-mcp
- Repository: https://github.com/vince-gonzalez/opticquiz.com
- Changelog RSS feed: https://verifymcp.io/servers/vince-gonzalez-cvdsafe/cvdsafe-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/vince-gonzalez-cvdsafe/cvdsafe-mcp.json
- HTML version of this page: https://verifymcp.io/servers/vince-gonzalez-cvdsafe/cvdsafe-mcp