Draw Chart.js charts as PNG images: a shareable image URL or the PNG itself.
Connect Runs on your machine
claude mcp add chartpng -e CHARTPNG_API_KEY=<CHARTPNG_API_KEY> -e CHARTPNG_BASE_URL=<CHARTPNG_BASE_URL> -- npx -y @chartpng/[email protected]{
"mcpServers": {
"chartpng": {
"command": "npx",
"args": [
"-y",
"@chartpng/[email protected]"
],
"env": {
"CHARTPNG_API_KEY": "<CHARTPNG_API_KEY>",
"CHARTPNG_BASE_URL": "<CHARTPNG_BASE_URL>"
}
}
}
}{
"mcpServers": {
"chartpng": {
"command": "npx",
"args": [
"-y",
"@chartpng/[email protected]"
],
"env": {
"CHARTPNG_API_KEY": "<CHARTPNG_API_KEY>",
"CHARTPNG_BASE_URL": "<CHARTPNG_BASE_URL>"
}
}
}
}{
"servers": {
"chartpng": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@chartpng/[email protected]"
],
"env": {
"CHARTPNG_API_KEY": "<CHARTPNG_API_KEY>",
"CHARTPNG_BASE_URL": "<CHARTPNG_BASE_URL>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
CHARTPNG_API_KEYOptional, secret | Optional Pro key. Without it the images carry a small watermark. |
CHARTPNG_BASE_URLOptional | API base URL. Default https://chartpng.dev |
Details
| Package | @chartpng/[email protected] (NPM, stdio) |
| First published | 3 Nov 2026 |
| Last updated | 3 Nov 2026 |
| Registry name | dev.chartpng/chartpng |
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