MCP, MCP server
ChartPane
MCP App that renders interactive Chart.js charts inline in Claude's UI.
Compatibility: Not stated.
Grade B
Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST OBFUSCATION_FILE_OVER_READ_CAP
Why this grade
- NETWORK_NO_FIXED_HOST Low
Makes a network call whose host is not written as a fixed address.
auth-handler.ts, line 137
const tokenResp = await fetch("https://oauth2.googleapis.com/token", { - NETWORK_UNNAMED_HOST Low
Calls a fixed host that the description does not name.
auth-handler.ts, line 137
const tokenResp = await fetch("https://oauth2.googleapis.com/token", { - OBFUSCATION_FILE_OVER_READ_CAP Note
A file was over the read cap and was not fully read.
landing/public/sitemap.xml, line 1
<?xml version="1.0" encoding="UTF-8"?>
Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.
Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.
What was checked
Plain notes from the hygiene checks.
Permissions
Pass
No shell or command execution found, and no extra permission was declared.
Install and update
Pass
No install-time script found, and dependencies are pinned or absent.
Network
Concern
can reach oauth2.googleapis.com. The description does not name that host. can reach a host that is not written as a fixed address. can reach assets.local. The description does not name that host.
NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST
auth-handler.ts, line 137
const tokenResp = await fetch("https://oauth2.googleapis.com/token", {
auth-handler.ts, line 158
const userinfoResp = await fetch(
worker.ts, line 25
const r = await env.ASSETS.fetch("https://assets.local/mcp-app.html");
Show more
worker.ts, line 49
fetch(req: Request, env: Env, ctx: ExecutionContext) {
worker.ts, line 115
async fetch(req: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
worker.ts, line 171
return oauthProvider.fetch(req, env, ctx);
CLAUDE.md, line 51
`mcp-app.html` → Vite + `vite-plugin-singlefile` → `dist/mcp-app.html` (single bundled file with Chart.js + all CSS/JS inlined). The `INPUT` env var sets the Rollup entry in `vite.
sandbox/sandbox.html, line 145
const res = await fetch(`/sandbox/fixture/${name}`);
Secrets
Pass
No read of a credential file or secret environment variable found.
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Note
a file was over the read cap and was not fully read.
OBFUSCATION_FILE_OVER_READ_CAP
landing/public/sitemap.xml, line 1
<?xml version="1.0" encoding="UTF-8"?>
Licence
Pass
A licence file is present (LICENSE).
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit 097a2af64a2c. can reach oauth2.googleapis.com. The description does not name that host. can reach a host that is not written as a fixed address. can reach assets.local. The description does not name that host. a file was over the read cap and was not fully read.
Date and source
Date checked:
github.com
Commit graded: 097a2af64a2c30b46296c283449ab52025f9bc52
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