Semiotic MCP Server: Setup for Claude, Cursor and Other Apps

• Recommends which chart fits your data

  Looks at a set of data rows and returns ranked chart suggestions with reasons, caveats and ready-to-use settings. It uses fixed rules, not another AI.

  Try: “Here is my sales table. Which chart type should I use?”

  Read · suggestCharts

• Picks a chart from a few sample rows

  Takes one to five sample rows and suggests a chart type, with optional filters for what you want to show.

  Try: “Suggest a chart for these three sample rows.”

  Read · suggestChart

• Draws a chart and returns it as an SVG image

  Renders a Semiotic chart to static SVG from the component name and settings you give. It also reports what was drawn, so the assistant can check the chart is not empty, or returns errors with fix hints.

  Try: “Render a line chart of monthly revenue from this data.”

  Read · renderChart

• Shows a chart in a ChatGPT widget with zoom and hover

  Renders a static-data chart through the same path as the chart renderer, then shows it in an interactive widget for ChatGPT Apps.

  Try: “Show this data as an interactive chart I can zoom.”

  Read · renderInteractiveChart

• Lists chart types and the settings each one accepts

  Returns the settings schema for one chart component, or the full catalog when you name none.

  Try: “What settings does the LineChart accept?”

  Read · getSchema

• Checks a chart setup for common mistakes

  Reviews a chart configuration for problems such as empty data, bad sizes, missing fields or the wrong data shape, and returns fixes.

  Try: “Why is my BarChart empty? Check this config.”

  Read · diagnoseConfig

• Checks whether a chart fits your data and offers alternatives

  Tests a requested chart against a dataset and returns ranked alternatives if it does not fit.

  Try: “Will a pie chart work for this data, or what else should I use?”

  Read · repairChartConfig

• Suggests variations of a chart you picked

  Scores variants of a chosen chart type, including related charts for the same goal, and returns ready-to-use settings.

  Try: “Show me three other ways to present this scatter plot.”

  Read · proposeChartVariants

• Plans a multi-chart dashboard

  Builds a dashboard suggestion whose panels cover different questions about your data.

  Try: “Plan a dashboard for this marketing data.”

  Read · suggestDashboard

• Recommends charts for live streaming data

  Takes a description of a data stream (shape, fields, speed) and recommends streaming charts.

  Try: “What chart suits a sensor feed with 10 readings a second?”

  Read · suggestStreamCharts

• Plans a dashboard for streaming data

  Composes a multi-panel dashboard from stream descriptions and a layout policy for the audience.

  Try: “Plan a live ops dashboard from these three streams.”

  Read · suggestStreamDashboard

• Suggests more advanced charts for a skilled audience

  Recommends picks that stretch past the usual charts, based on an audience profile of how chart-literate readers are.

  Try: “Suggest a few less common charts for a data-savvy audience.”

  Read · suggestStretchCharts

• Recommends icon or dot styles for showing risk and counts

  Recommends a token or icon-based encoding for a reader task such as estimating probability, and warns about weak choices.

  Try: “How should I show a 1 in 20 risk with dots?”

  Read · suggestTokenEncoding

• Summarises a chart so questions about it can be answered

  Returns a statistical summary and chart-aware context so the assistant can answer questions about the chart, with optional annotations.

  Try: “What is the main trend in this chart?”

  Read · interrogateChart

• Describes a chart in words for non-visual readers

  Builds a layered text description of a chart plus a navigation tree, so an assistant or screen reader can read it without seeing it.

  Try: “Describe this chart for a screen-reader user.”

  Read · groundChart

• Lists chart themes or shows how to apply one

  Lists named theme presets, or returns the code and CSS needed to use one, such as tufte.

  Try: “Which chart themes are available, and how do I use tufte?”

  Read · applyTheme

• Checks a chart setup for accessibility gaps

  Statically grades a chart configuration against the Chartability accessibility framework. It does not test in a real browser.

  Try: “Audit this chart config for accessibility.”

  Read · auditAccessibility

• Runs a quality check on a chart

  Runs one pass over a chart: data checks, misleading-design checks and accessibility checks, and returns findings ranked by severity.

  Try: “Evaluate this chart for quality and misleading design.”

  Read · evaluateChart

• Checks whether a chart will work on a phone

  Flags risks such as fixed widths, crowded marks, hover-only details and tiny touch targets. It is static analysis only.

  Try: “Will this chart work on a phone screen?”

  Read · auditMobileVisualization

• Checks a chart against a stated purpose and evidence policy

  Evaluates an artifact contract (purpose, claims, evidence, timing, review) under a named policy, without guessing missing facts.

  Try: “Audit this chart contract under the strict policy.”

  Read · auditArtifact

• Compares a chart with other ways to present the result

  Compares chart and non-chart options against the data, claims, evidence and policy you supply.

  Try: “Should this finding be a chart or a table?”

  Read · recommendRepresentation

• Proposes fixes to a chart contract

  Suggests repairs to a chart contract and can fill missing identity fields. It never invents source, evidence, review or timing facts.

  Try: “Propose repairs for this chart contract.”

  Read · repairArtifact

• Explains why a chart should not be published yet

  Explains which policy obligations block publication or action and what safe follow-up work remains.

  Try: “Why was this chart refused, and what can I do?”

  Read · explainRefusal

• Builds a pre-filled GitHub bug report link

  Returns a link you can open to file a bug or feature request. It builds the URL only and does not post anything.

  Try: “Draft a bug report for this rendering problem.”

  Read · reportIssue

Watch out for

• Hosted option sends your data to a public server

  The Hosted setup sends chart data to a server you do not control. Use the local npx setup for anything private. github.com

• Local web mode is closed to browsers by default

  The optional HTTP mode binds to 127.0.0.1 and rejects browser requests unless you allow an origin. Only open it wider if you need to, and set an auth token. github.com

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