Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add RiverThrimp/echarts-chartpage --skill echarts-chartpage-mcpgit clone --depth 1 https://github.com/RiverThrimp/echarts-chartpageWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/riverthrimp/echarts-chartpage/echarts-chartpage-mcp)<a href="https://agentmods.dev/skills/riverthrimp/echarts-chartpage/echarts-chartpage-mcp"><img src="https://agentmods.dev/badge/skills/riverthrimp/echarts-chartpage/echarts-chartpage-mcp/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/riverthrimp/echarts-chartpage/echarts-chartpage-mcp"><img src="https://agentmods.dev/badge/skills/riverthrimp/echarts-chartpage/echarts-chartpage-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00052 | $0.00790 |
| Opus 5 | $0.00026 | $0.00395 |
| Sonnet 5 | $0.00010 | $0.00158 |
| Haiku 4.5 | $0.00005 | $0.00079 |
Grade A, and why
echarts-chartpage-mcp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ECharts ChartPage MCP Skill
Use this skill when the task is about:
- generating a chart page from structured JSON data
- choosing a safe chart type for a data mapping
- validating chart input or generated HTML
- patching an existing chart spec instead of rebuilding it from scratch
Do not use this skill when:
- the user only wants a prose explanation about chart design
- the user wants a custom frontend app instead of a generated HTML artifact
- the user does not have structured data yet and only needs schema design help
Trigger Rules
Prefer this MCP when the user can provide, or you can infer with high confidence:
titlegoaldatafields.xfields.y
Call the tools in this order:
recommend_chart_typeUse when the user has data and mapping, but the chart type is not fixed yet.validate_chart_pageUse before generation when mappings may be incomplete, fields may be wrong, or the data source looks noisy.generate_chart_pageUse when the input is complete enough to produce a final HTML artifact.patch_chart_pageUse when the user wants to keep the same chart and only change title, theme, chart type, or field mapping.
Required Calling Discipline
- Always send structured JSON only.
- Never pass arbitrary JavaScript, formatter functions, script snippets, or HTML fragments into tool arguments.
- Always keep
outputModeassingle_html. - Keep
fields.yto the minimum set needed for the chart. - If the user asks for a small edit to an existing chart spec, prefer
patch_chart_pageover a full regenerate. - If field existence is uncertain, run
validate_chart_pagefirst. - If the user only says “pick the best chart”, run
recommend_chart_typebeforegenerate_chart_page.
Minimal Preflight Checklist
Before calling any tool, verify:
datais an array of JSON recordsfields.xexists in the records- every field in
fields.yexists in the records goalis one oftrend | compare | composition | distribution | ranking | correlationthemeislightordarkwhen provided
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 100 lines · 52 tokens per session scan A 42ce02c0a779
echarts-chartpage-mcp is a skill published in the GitHub repository RiverThrimp/echarts-chartpage (0 stars, last pushed 4mo ago), licensed MIT. It adds 52 tokens to every session and 790 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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