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CleanChart

by cleanchart.app · remote · no sign-in to list tools · v1.0.0 · published by app.cleanchart

Clean messy tabular data and render publication-ready PNG charts from your AI assistant.

Changes · 4
CompareRegistry entry

8 tools: 4 change things and 4 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http cleanchart https://www.cleanchart.app/api/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

8 tools

Changes things 4Claude Code: ask
  • apply_data_fixesClean tabular data with CleanChart's fix engine and get the cleaned rows back plus a change log.No findings

    Why it is in this group

    • The name "apply_data_fixes" says "apply": a word for a change.
    Description, as the server wrote it
    Clean tabular data with CleanChart's fix engine and get the cleaned rows back plus a change log. Options (all optional booleans unless noted): remove_duplicates, remove_empty_rows, remove_empty_columns, trim_whitespace, replace_invalid_values (turn N/A/-/? into null), nullify_missing, convert_types, missing_strategy ('fill_smart' fills gaps with column mean or 'Unknown'), date_standardization with date_columns (string[], converts recognized date formats to YYYY-MM-DD), strip_numeric_formatting with format_columns (string[]), strip_coded_values with coded_columns (string[]).
  • claim_chartRedeem a paid single-chart purchase (from create_checkout with kind 'single_chart') and receive the clean, full-resolution PNG.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Redeem a paid single-chart purchase (from create_checkout with kind 'single_chart') and receive the clean, full-resolution PNG. Call this after the user confirms payment. Returns payment_pending while the checkout is unpaid — wait for the user, do not poll in a loop. By default the image is only delivered inline and never stored; pass returnUrl:true if the user needs a downloadable file — the response then also includes chartUrl, a direct link to the PNG valid for 24 hours — surface it to the user.
  • create_checkoutCreate a payment link the USER must open in their browser — never call this without the user explicitly asking to purchase.No findings

    Why it is in this group

    • The name "create_checkout" says "create": a word for a change.
    Description, as the server wrote it
    Create a payment link the USER must open in their browser — never call this without the user explicitly asking to purchase. kind 'single_chart' (pass the exact data, chartType, and config to be rendered; after payment call claim_chart to receive the clean chart), 'day_pass' (24h unlimited clean exports), or 'subscription' (monthly unlimited). day_pass and subscription are account-based: after payment CleanChart emails a sign-in link, and an API key from the dashboard unlocks clean renders over MCP.
  • generate_chartRender a publication-ready chart from tabular data and return it as a PNG image.No findings

    Why it is in this group

    • The name "generate_chart" says "generate": a word for a change.
    Description, as the server wrote it
    Render a publication-ready chart from tabular data and return it as a PNG image. By default the image is only delivered inline and never stored — in chat UIs the user can save it straight from the conversation. If the user needs a downloadable file (e.g. your client cannot save inline images), pass returnUrl:true: the response then also includes chartUrl, a direct link to the PNG valid for 24 hours — surface it to the user. Without an API key the free tier applies: watermark and reduced resolution — mention the upgrade info from the response to the user if they want a clean export (create_checkout provides a payment link). With a CleanChart API key (Authorization: Bearer cc_...) and an active subscription or 24h day pass, output is clean and full resolution. Call validate_chart_config first; large datasets are sampled automatically.
Only reads 4Claude Code: allow
  • detect_data_issuesAnalyze tabular data for quality issues before charting: duplicates, missing values, whitespace, invalid tokens (N/A, -, ?), type mismatches, outliers, inconsistent date formats, a…No findings

    Why it is in this group

    • The description's first verb is "analyze": a word for reading.
    Description, as the server wrote it
    Analyze tabular data for quality issues before charting: duplicates, missing values, whitespace, invalid tokens (N/A, -, ?), type mismatches, outliers, inconsistent date formats, and per-column inferred types. Returns a report whose findings map directly to apply_data_fixes options.
  • get_entitlementsShow the caller's current CleanChart tier.No findings

    Why it is in this group

    • The name "get_entitlements" says "get": a word for reading.
    Description, as the server wrote it
    Show the caller's current CleanChart tier. Anonymous callers are free tier (watermarked, reduced resolution). With an API key (Authorization: Bearer cc_..., created in the CleanChart dashboard) this reflects the account's subscription or 24h day pass.
  • list_chart_typesList all chart types CleanChart can render, each with its default config object.No findings

    Why it is in this group

    • The name "list_chart_types" says "list": a word for reading.
    Description, as the server wrote it
    List all chart types CleanChart can render, each with its default config object. Use a default config as the starting point, override what you need (title, xColumn, yColumn, colors, ...), then call validate_chart_config before generate_chart.
  • validate_chart_configDry-run validation of a chart config for a given chart type.No findings

    Why it is in this group

    • The name "validate_chart_config" says "validate": a word for reading.
    Description, as the server wrote it
    Dry-run validation of a chart config for a given chart type. Returns valid:true or a list of human-readable problems to fix. Always call this before generate_chart — it is free and instant, while a failed render costs a rate-limited attempt.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http cleanchart https://www.cleanchart.app/api/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__cleanchart__list_chart_types",
      "mcp__cleanchart__validate_chart_config",
      "mcp__cleanchart__detect_data_issues",
      "mcp__cleanchart__get_entitlements"
    ],
    "ask": [
      "mcp__cleanchart__apply_data_fixes",
      "mcp__cleanchart__generate_chart",
      "mcp__cleanchart__create_checkout",
      "mcp__cleanchart__claim_chart"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as cleanchart. Review it before you use it.