Flint Chart MCP Server: Draw Charts in Claude and Cursor

• Draws a chart as a PNG or SVG image

  Takes your data and one chart description and returns the finished chart as an inline PNG or SVG. It can draw with Vega-Lite, ECharts or Chart.js, and runs on your machine.

  Try: “Draw a bar chart of revenue by region from this data as a PNG.”

  Files · render_chart

• Converts a chart description to a chart library spec

  Turns a Flint chart description into the native spec for Vega-Lite, ECharts or Chart.js, with any warnings, so you can use it in your own code.

  Try: “Give me the ECharts spec for this line chart.”

  Files · compile_chart

• Checks a chart description before drawing

  Checks that a chart description is valid and reports warnings, errors and the computed size. It can also check update layers you plan to apply.

  Try: “Check this chart spec for problems before we draw it.”

  Files · validate_chart

• Lists the chart types it can draw

  Returns the roughly 40 chart types, their encoding channels and the interaction presets each backend supports.

  Try: “Which chart types can Flint draw with Vega-Lite?”

  Read · list_chart_types

• Lists chart interaction options

  Returns the interaction presets such as hover or brush, what each does, what it needs from the chart and every option it accepts.

  Try: “What interactions can I add to a scatter plot?”

  Read · list_interaction_presets

• Lists the visual themes

  Returns the built-in chart themes, or guidance for one chosen theme such as Economist style.

  Try: “Which chart themes are available?”

  Read · list_themes

• Loads Flint's built-in authoring guide

  Returns one of the bundled guides (charts, themes, interactions or boards) as markdown so the assistant writes valid chart descriptions.

  Try: “Load the Flint chart guide before you build the chart.”

  Read · get_flint_skill

• Checks a multi-chart dashboard

  Checks a board of several charts without drawing it and returns its report, layout, links and review.

  Try: “Validate this three-chart board layout.”

  Files · validate_board

• Shows a live chart card in the chat

  Opens an interactive chart or board card in apps that support it, such as Claude Desktop. The card has an editing panel for chart type, fields and themes.

  Try: “Show the planets chart as an interactive card.”

  Files · show

Watch out for

• It can read any local data file by default

  The assistant can point the tool at a .csv, .json or .tsv file anywhere on your machine. Add --disable-file-reference to the server command to allow only inline data. github.com

• Remote data links are not fetched

  The README says remote URLs are never fetched, and rendering happens in the same process with no external chart service. github.com

Security advisories