Charts by Szum
by szum.io · remote · no sign-in to list tools · v2.0.0 · published by io.szum
Create, inspect, manage, and render charts and data visualizations as SVG/PNG or interactive embeds.
14 tools: 2 can delete or cancel things, 3 change things and 9 only read.
Scanned Oct 21, 2026
- Deletes or cancels2Claude Code: deny: see these tools
- Can't be undone0Claude Code: ask
- Changes things3Claude Code: ask: see these tools
- Only reads9Claude Code: allow: see these tools
No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.
claude mcp add --transport http charts https://szum.io/mcpTools
Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.
14 tools
Deletes or cancels 2Claude Code: deny
delete_chartUse this when the user explicitly wants to permanently delete one saved chart.No findings
Why it is in this group
- The name "delete_chart" says "delete": a word for removing or ending something.
- The description says "permanently delete".
- The server marks it destructive (destructiveHint: true).
Description, as the server wrote it Use this when the user explicitly wants to permanently delete one saved chart. Deletion cannot be undone, and retrying an already completed deletion succeeds; requires authentication.
Annotations the server declares
- title: Delete chart
- readOnlyHint: false
- openWorldHint: true
- destructiveHint: true
- idempotentHint: true
update_chartUse this when the user wants to replace and publish a saved chart's document while keeping its id and URLs.No findings
Why it is in this group
- The name "update_chart" says "update": a word for a change.
- The server marks it destructive (destructiveHint: true).
Description, as the server wrote it Use this when the user wants to replace and publish a saved chart's document while keeping its id and URLs. Validate each generated or changed chart input once before rendering, saving, or updating. Do not revalidate unchanged input; a successful render preflights it for later saves or updates. Errors block; warnings require explicit user approval for the exact chart input. Rendering may add layout warnings to the semantic findings before an action proceeds. Suggestions do not block. A suggestedDocument is a complete, validated replacement. Review the proposed changes before using it; validate again only if you modify it. Refuses charts with unpublished editor changes; requires authentication and saved-chart storage.
Annotations the server declares
- title: Update chart
- readOnlyHint: false
- openWorldHint: true
- destructiveHint: true
Changes things 3Claude Code: ask
rename_chartUse this when the user wants to change a saved chart's library title without changing its document, publication state, or public URLs; requires authentication.No findings
Why it is in this group
- The name "rename_chart" says "rename": a word for a change.
Description, as the server wrote it Use this when the user wants to change a saved chart's library title without changing its document, publication state, or public URLs; requires authentication.
Annotations the server declares
- title: Rename chart
- readOnlyHint: false
- openWorldHint: false
- destructiveHint: false
render_chartUse this when the user wants to preview or generate a chart.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 Use this when the user wants to preview or generate a chart. Validate each generated or changed chart input once before rendering, saving, or updating. Do not revalidate unchanged input; a successful render preflights it for later saves or updates. Errors block; warnings require explicit user approval for the exact chart input. Rendering may add layout warnings to the semantic findings before an action proceeds. Suggestions do not block. A suggestedDocument is a complete, validated replacement. Review the proposed changes before using it; validate again only if you modify it. Stores a 1 hour preview and returns public image URLs. Authenticated previews use the account's render allowance, and each image produced from a returned URL is another render. Anonymous previews are complimentary; their images use the anonymous image allowance.
Annotations the server declares
- title: Render chart
- readOnlyHint: false
- openWorldHint: true
- destructiveHint: false
save_chartUse this when the user wants to permanently save and publish a Szum chart document.No findings
Why it is in this group
- The name "save_chart" says "save": a word for a change.
Description, as the server wrote it Use this when the user wants to permanently save and publish a Szum chart document. Validate each generated or changed chart input once before rendering, saving, or updating. Do not revalidate unchanged input; a successful render preflights it for later saves or updates. Errors block; warnings require explicit user approval for the exact chart input. Rendering may add layout warnings to the semantic findings before an action proceeds. Suggestions do not block. A suggestedDocument is a complete, validated replacement. Review the proposed changes before using it; validate again only if you modify it. Supply one idempotencyKey per intended chart and reuse it for retries. Returns permanent public Image and Embed URLs plus Edit and Studio links; requires authentication and saved-chart storage.
Annotations the server declares
- title: Save chart
- readOnlyHint: false
- openWorldHint: true
- destructiveHint: false
Only reads 9Claude Code: allow
get_chartUse this when the user identifies a saved chart by id and wants to view it or retrieve its metadata and URLs.No findings
Why it is in this group
- The name "get_chart" says "get": a word for reading.
Description, as the server wrote it Use this when the user identifies a saved chart by id and wants to view it or retrieve its metadata and URLs. Displays the published chart when available and does not return its document; requires authentication.
Annotations the server declares
- title: Get chart
- readOnlyHint: true
- openWorldHint: false
- destructiveHint: false
get_chart_documentUse this when the user identifies a saved chart by id and needs its complete published Szum document for inspection or reuse.No findings
Why it is in this group
- The name "get_chart_document" says "get": a word for reading.
Description, as the server wrote it Use this when the user identifies a saved chart by id and needs its complete published Szum document for inspection or reuse. Does not return a newer editor draft; requires authentication.
Annotations the server declares
- title: Get chart document
- readOnlyHint: true
- openWorldHint: false
- destructiveHint: false
get_examplesGet complete Szum documents for validation, rendering, or saving, with guidance on when to use each pattern.No findings
Why it is in this group
- The name "get_examples" says "get": a word for reading.
Description, as the server wrote it Get complete Szum documents for validation, rendering, or saving, with guidance on when to use each pattern. No filters returns one starter per chart type. Any filter searches the complete catalog; all supplied filters intersect. Most data is illustrative; the Vinyl waterfall cites RIAA reports. Empty matches mean no example satisfies every filter; remove a filter to broaden the search.
Annotations the server declares
- title: Get example charts
- readOnlyHint: true
- openWorldHint: false
- destructiveHint: false
get_preview_stateUse this when the Szum chart App needs to restore a rendered preview as its current transient or saved view.No findings
Why it is in this group
- The name "get_preview_state" says "get": a word for reading.
Description, as the server wrote it Use this when the Szum chart App needs to restore a rendered preview as its current transient or saved view. It is read-only, owner-scoped when authenticated, and hidden from the model.
Annotations the server declares
- title: Get chart preview state
- readOnlyHint: true
- openWorldHint: false
- destructiveHint: false
- idempotentHint: true
get_schemaUse this before authoring an unfamiliar field instead of probing validate_chart for errors.No findings
Why it is in this group
- The name "get_schema" says "get": a word for reading.
Description, as the server wrote it Use this before authoring an unfamiliar field instead of probing validate_chart for errors. Returns the JSON Schema for the whole Szum document, covering config, data, presentation, size, and output, with every referenced definition included. Pass chart_type to keep only that family's config variants; omitting it returns every family and is much larger. Generated value lists are summarized rather than enumerated; validate_chart remains the authority.
Annotations the server declares
- title: Get chart document schema
- readOnlyHint: true
- openWorldHint: false
- destructiveHint: false
list_chart_typesUse this when choosing a chart family.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 Use this when choosing a chart family. Returns every current chart type with its shared and family-specific fields.
Annotations the server declares
- title: List chart types
- readOnlyHint: true
- openWorldHint: false
- destructiveHint: false
list_chartsUse this when the user wants to find charts in their saved library.No findings
Why it is in this group
- The name "list_charts" says "list": a word for reading.
Description, as the server wrote it Use this when the user wants to find charts in their saved library. Returns paginated metadata and URLs, not chart documents; requires authentication. Draft-only editor charts have publishedAt null, hasDraft true, and sizeBytes 0 because sizeBytes measures only the stored published document, not draft storage.
Annotations the server declares
- title: List charts
- readOnlyHint: true
- openWorldHint: false
- destructiveHint: false
list_themesUse this when choosing a visual theme for a chart.No findings
Why it is in this group
- The name "list_themes" says "list": a word for reading.
Description, as the server wrote it Use this when choosing a visual theme for a chart. Returns every built-in theme with guidance on where each works best and, when signed in, the workspace's shared themes.
Annotations the server declares
- title: List themes
- readOnlyHint: true
- openWorldHint: false
- destructiveHint: false
validate_chartUse this when a chart request or document will be rendered, saved, or updated.No findings
Why it is in this group
- The name "validate_chart" says "validate": a word for reading.
Description, as the server wrote it Use this when a chart request or document will be rendered, saved, or updated. Validate each generated or changed chart input once before rendering, saving, or updating. Do not revalidate unchanged input; a successful render preflights it for later saves or updates. Errors block; warnings require explicit user approval for the exact chart input. Rendering may add layout warnings to the semantic findings before an action proceeds. Suggestions do not block. A suggestedDocument is a complete, validated replacement. Review the proposed changes before using it; validate again only if you modify it. Read-only, free, and fast.
Annotations the server declares
- title: Validate chart input
- readOnlyHint: true
- openWorldHint: false
- destructiveHint: false
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 2.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http charts https://szum.io/mcpRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__charts__list_charts",
"mcp__charts__get_chart",
"mcp__charts__get_chart_document",
"mcp__charts__get_preview_state",
"mcp__charts__list_themes",
"mcp__charts__validate_chart",
"mcp__charts__list_chart_types",
"mcp__charts__get_examples",
"mcp__charts__get_schema"
],
"ask": [
"mcp__charts__render_chart",
"mcp__charts__save_chart",
"mcp__charts__rename_chart"
],
"deny": [
"mcp__charts__update_chart",
"mcp__charts__delete_chart"
]
}
}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 charts. Review it before you use it.