# ChartPNG (npm · @chartpng/mcp)

Draw Chart.js charts as PNG images: a shareable image URL or the PNG itself.

- Trust score: 67/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- npm · `@chartpng/mcp`: 67/100 (this document), [markdown](https://verifymcp.io/servers/dev-chartpng-chartpng/chartpng-mcp.md), [page](https://verifymcp.io/servers/dev-chartpng-chartpng/chartpng-mcp)

## Channel facts

- Registry: `npm`
- Package: `@chartpng/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 2026-11-05.

- **Supply Chain Security**: 97/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 1 of 1 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 19/100
  - Repository check failed: no source repository is declared.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 1 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 79/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 283 tokens (~141/item across 2 items; 2 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 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 2 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 2 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the ChartPNG MCP server?

ChartPNG runs locally as an npm package, launched with npx -y @chartpng/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 dev-chartpng-chartpng -- npx -y @chartpng/mcp
```

### Cursor

```json
{
  "mcpServers": {
    "dev-chartpng-chartpng": {
      "command": "npx",
      "args": [
        "-y",
        "@chartpng/mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "dev-chartpng-chartpng": {
      "command": "npx",
      "args": [
        "-y",
        "@chartpng/mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add dev-chartpng-chartpng -- npx -y @chartpng/mcp
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add dev-chartpng-chartpng --command npx --arg -y --arg @chartpng/mcp
```

### Hermes

```yaml
mcp_servers:
  dev-chartpng-chartpng:
    command: "npx"
    args: ["-y", "@chartpng/mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "dev-chartpng-chartpng": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@chartpng/mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add dev-chartpng-chartpng -t stdio -c npx -a -y @chartpng/mcp
```

### Other

```json
{
  "mcpServers": {
    "dev-chartpng-chartpng": {
      "command": "npx",
      "args": [
        "-y",
        "@chartpng/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.

### 2026-11-05 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-04 (score 66, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-11-03 (score 51, +1)

- [security improvement] Malware scan: unverified → pass
- [functional regression] Dependency health: 0.85 → 0.75
- [functional improvement] Stability: unverified → 0.03
- [functional] MCP protocol: Implements a current MCP spec version (2026-07-28).
- [functional] Package version: 0.1.0 → 0.2.0

### 2026-11-02 (score 50)

First indexed and scored.

## MCP tools (2)

### `chart_url` (~156 tokens)

Chart image URL

Get a public PNG URL for a chart. Use it when the chart goes into an email, a Slack or chat message, a PDF or a Markdown document (as ![title](url)). The data travels in the URL: anyone with the URL can see the chart and its data, so for confidential data use render_chart.

Input parameters:

- `background` (string): CSS color, default white
- `config` (object, required): A Chart.js v4 configuration as plain JSON (no functions), e.g. {"type":"bar","data":{"labels":[...],"datasets":[{"label":"...","data":[...]}]}}
- `height` (integer): Pixels, default 360
- `width` (integer): Pixels, default 600

### `render_chart` (~127 tokens)

Render chart image

Render a chart and return the PNG image itself, to look at it or save it as a file. Takes configs up to 16 KB of JSON, larger than a URL allows.

Input parameters:

- `background` (string): CSS color, default white
- `config` (object, required): A Chart.js v4 configuration as plain JSON (no functions), e.g. {"type":"bar","data":{"labels":[...],"datasets":[{"label":"...","data":[...]}]}}
- `height` (integer): Pixels, default 360
- `width` (integer): Pixels, default 600

## Diagnostics

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

## Score history

- 2026-11-05: 67
- 2026-11-04: 66
- 2026-11-03: 51
- 2026-11-02: 50

## Common questions

### What is the ChartPNG MCP server?

ChartPNG is an MCP server listed in the public MCP registry as dev.chartpng/chartpng. Draw Chart.js charts as PNG images: a shareable image URL or the PNG itself. This page covers its npm package (@chartpng/mcp).

### Is the ChartPNG MCP server safe to use?

ChartPNG scores 67 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 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 ChartPNG MCP server expose?

ChartPNG exposes 2 tools: chart_url, render_chart. Their descriptions and schemas cost roughly 283 tokens of context every time the server is loaded.

### Is the ChartPNG MCP server still maintained?

ChartPNG 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 licence is the ChartPNG MCP server under?

ChartPNG 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/@chartpng/mcp
- Socket report: https://socket.dev/npm/package/@chartpng/mcp
- Website: https://chartpng.dev/docs
- Changelog RSS feed: https://verifymcp.io/servers/dev-chartpng-chartpng/chartpng-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/dev-chartpng-chartpng/chartpng-mcp.json
- HTML version of this page: https://verifymcp.io/servers/dev-chartpng-chartpng/chartpng-mcp