ChartBytes
OCI · GHCR.IO/HASWELL119/CHARTBYTES-MCP:1.0.2
Generate chart images (bar, hbar, stacked, line, area, scatter, pie, donut) as PNG/SVG for AI agents
Available components
Last scanned (3 hours ago)
Scores higher than 64% of OCI servers
Category Design and Media
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 Security0
- No malware scan is available for this kind of package: the supply-chain vendors we use do not cover it. This is a permanent gap in our coverage, not a finding about the package.Unverified
- Known CVEs could not be checked: this artifact ships no SBOM or dependency manifest, so there is no dependency list to read.Unverified
- Install-script risk not yet assessed.Unverified
- Dependency health could not be checked: this artifact ships no SBOM or dependency manifest, so there is no dependency list to read.Unverified
Provenance & Transparency6
- Repository check failed: no source repository is declared. See how to fix → View diagnostics → Fail
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- License check failed: no license is declared. See how to fix → Fail
- Actively maintained (last published 40 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability66
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 404 tokens (~404/item across 1 items; 1 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 1 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 1 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Unverified: 1 category
A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.
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.
- 2 Nov 26 0
- Stability: 0.97 → pass security
- 1 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 −1
- Stability: pass → 0.93 functional
- 25 Oct 26 0
- Stability: 0.97 → pass security
- 24 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 22 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.
- 20 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.
- 18 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.
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 5 Nov 2026 · Analysed oci/ghcr.io/haswell119/chartbytes-mcp:1.0.2
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | oci |
| Reason | No attestation published |
Background: How many MCP packages publish verified provenance →
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 →
generate_chart ~404
Render a chart as a static image (PNG or SVG) via the ChartBytes API and return it both inline (an image the caller can view) and as an embeddable URL + Markdown snippet for READMEs, emails, Notion, Slack, or PDFs — anywhere an <img> works but a JavaScript charting library cannot. Read-only: generates an image from the supplied data and never mutates external state.
| Name | Type | Req | Description |
|---|---|---|---|
| data | array|string | yes | Required. Values to plot. A flat number list e.g. [12,19,8,24] renders one series; a list of series e.g. [[4,8,6],[2,3,4]] renders grouped/stacked bars; or pass a string '1,2,3|4,5,6' (series separat… |
| format | string | – | Output format: 'png' (default) or 'svg'. |
| height | integer | – | Image height in pixels (default 300). |
| labels | array|string | – | Category labels for the data, as a list of strings or a comma-separated string. Optional. |
| theme | string | – | Color theme. 'light' is free; 'dark' and 'brand' require a ChartBytes Pro license (a one-time paid upgrade). If Pro is requested without a license the server explains how to buy it. |
| title | string | – | Chart title shown above the plot. Optional. |
| type | string | – | Chart type to render: 'bar' (vertical bars), 'hbar' (horizontal bars), 'stacked' (stacked vertical bars, one per series), 'line' (line chart, multi-series), 'area' (filled line), 'scatter' (points on… |
| width | integer | – | Image width in pixels (default 600). |
No output schema declared.
No examples provided.
How do I install the ChartBytes MCP server?
ChartBytes runs locally as a container image, launched with docker run --rm -i -e CHARTBYTES_URL -e CHARTBYTES_LICENSE ghcr.io/haswell119/chartbytes-mcp:1.0.2. Ready-made configuration for Claude, Cursor, VS Code, Codex and 3 more is on this page, copied from each client's own documentation.
oci · ghcr.io/haswell119/chartbytes-mcp:1.0.2
claude mcp add haswell119-chartbytes-mcp -- docker run --rm -i -e CHARTBYTES_URL -e CHARTBYTES_LICENSE ghcr.io/haswell119/chartbytes-mcp:1.0.2
This image reads CHARTBYTES_URL and CHARTBYTES_LICENSE. Set them in your client's env block for this server; docker run -e passes each one through to the container.
What is the ChartBytes MCP server?
ChartBytes is an MCP server listed in the public MCP registry as io.github.Haswell119/chartbytes-mcp. Generate chart images (bar, hbar, stacked, line, area, scatter, pie, donut) as PNG/SVG for AI agents. This page covers its container image (ghcr.io/haswell119/chartbytes-mcp:1.0.2).
Is the ChartBytes MCP server safe to use?
ChartBytes scores 45 out of 100 on VerifyMCP. 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 ChartBytes MCP server expose?
ChartBytes exposes 1 tool: generate_chart. Their descriptions and schemas cost roughly 404 tokens of context every time the server is loaded.
Is the ChartBytes MCP server still maintained?
ChartBytes 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.