Chart-Output MCP Server
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| CHART_OUTPUT_API_KEY | Yes | API key for Chart-Output, obtained from chart-output.com (free trial available) |
Capabilities
Features and capabilities supported by this server
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| render_chartC | Render a chart from a Chart.js JSON specification. Returns the chart as an inline image. Supports line, bar, pie, doughnut, radar, and polarArea chart types. |
| render_chart_urlA | Render a chart and return a CDN URL instead of image bytes. Use this when you need a stable URL to embed in HTML, email, or pass to another tool. Same inputs as render_chart. |
| render_chart_aiB | Generate a chart from a natural language description and optional raw data. Chart-Output's AI layer builds the chart spec automatically. Requires a Pro or Business API key. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
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