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Charts by Szum
szum.io/mcp
Excellent
Protocol
Tools
All tools have descriptions
All tools have non-empty descriptions
All tools have OpenAI behavior hints
All tools declare the three OpenAI behavior hints as booleans
Tool names use valid characters
All tool names use valid characters
Tool names follow the MCP 1–128 character range
All tool names follow the MCP recommended length
Tool names follow MCP uniqueness guidance
All tool names are unique
Tool input schemas have a valid object structure
All tool input schemas have a valid object structure
Tool input header annotations are valid
All x-mcp-header annotations satisfy Streamable HTTP requirements
Declared output schemas have a valid basic structure
6 output schema issue(s) found
How to fix: Fix the declared JSON Schema structure (for example, every required name must exist in properties). An outputSchema may describe any JSON value, including an array; returned structuredContent must match it at runtime.
Tool text has no hidden control characters
No invisible or control characters found in tool-facing text
Tool invocation metadata present
5 tool(s) missing openai/toolInvocation metadata
How to fix: For tools that render a UI resource, add openai/toolInvocation with string fields invoking and invoked (present-tense labels shown while the tool runs and after it finishes, e.g. "Searching…" / "Searched").
Tool-linked resource URI is readable
All tool-linked resource URIs are readable
Tool visibility metadata is valid
All explicit ui.visibility arrays are valid
MCP Apps
All discovered view resources were inspected
Inspected all 1 discovered view resource(s)
View resource envelope is valid
All view resources are readable and use ui:// with a supported MCP Apps HTML MIME type
View resource metadata complete
All view resources have a mimeType and widget description
CSP metadata covers literal external origins
All statically detectable external origins are declared in CSP metadata
View resources declare a domain
All view resources declare one shared HTTPS origin
Declared domains respond
All declared domains are reachable
Client compatibility
Skills over MCP resources are readable
Server does not advertise the Skills over MCP extension
Claude Code metadata fits its 2 KB fields
Tool descriptions and server instructions fit Claude Code's 2 KB fields
Claude tools declare applicable behavior hints
All tools include an applicable readOnlyHint or destructiveHint
Claude tool names are within 64 characters
All tool names are within Claude's 64-character limit
Cursor tool-name budget advisory
No tool name independently exhausts Cursor's observed 60-character combined budget
ChatGPT tool names are unique
All tool names are unique
All tools have a display title
All tools have a display title
OpenAI file parameters use valid schemas
All declared OpenAI file parameters use reviewer-valid schemas
Overview
- Author
- Bartosz Prusinowski
- Verification
- community
- Auth
- None — public endpoint
- Categories
- data-analyticsdeveloper-tools
- Works with
- claudeclaude-apiclaude-codeclaude-desktop
- Docs
- Documentation
delete_chartget_chartget_chart_configget_exampleslist_chartslist_markslist_themesrename_chartrender_chartsave_chartupdate_chartvalidate_chartRelated MCP servers
FAQ
Charts by Szum install, tools, readiness, and alternatives.
How do I add Charts by Szum to Claude, ChatGPT, or Cursor?
Add Charts by Szum to Claude, ChatGPT, or Cursor by connecting its remote MCP URL in each client's MCP settings. In Claude, add a custom connector. In ChatGPT, add an MCP app. In Cursor, add an MCP server under Settings. The MCP URL is https://szum.io/mcp.
Is Charts by Szum MCP ready for ChatGPT and Claude?
As of September 15, 2026, Charts by Szum scores 93/100 on Manufact's MCP publishing checklist. The scan does not yet meet ChatGPT publishing checks and does not yet meet Claude publishing checks.
What tools does the Charts by Szum MCP server provide?
Charts by Szum provides these MCP tools: delete_chart, get_chart, get_chart_config, get_examples, list_charts, list_marks, list_themes, rename_chart, render_chart, save_chart, update_chart, and validate_chart.
What are the best alternatives to Charts by Szum?
As of September 16, 2026, alternatives to Charts by Szum in data-analytics on the Manufact MCP catalog include Contract-Factory — Sociétés & SIREN, Credits.fm, Epicure, Inbin Pulse, and Keenable Web Search.
Does Charts by Szum MCP require authentication?
Charts by Szum does not require authentication. It is a public MCP endpoint you can connect without logging in.
Who develops Charts by Szum?
Charts by Szum is developed by Bartosz Prusinowski. It is listed as community on the Claude connector directory.
Not your MCP?
Scan any public or OAuth MCP URL against ChatGPT and Claude publishing checks. No account required.