Charts by Szum

REMOTE · SZUM.IO · SCANNED AUG 3

Create, inspect, manage, and render charts and data visualizations as SVG/PNG or interactive embeds.

Available components

+5 this week 71 71 Trust /100

Trust breakdown (6 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score →

Endpoint Security63

The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (update_chart). See how to fix → View diagnostics → Fail
HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail

Transport & Reachability100

Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass

Schema Quality & AI Usability82

100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
AI-judged instruction clarity (good).Pass
Tool/resource definitions use about 1682 tokens (~105/item across 16 items; 13 tools + 3 resources), lean.Pass
Usage-examples check failed: none of the tools include examples. See how to fix → Fail

Stability & Change Management27

Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial

Tool Coverage100

100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
100% of tool parameters carry a description.Pass
Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass

Capabilities100

Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Supports UI / widget rendering.Pass

Install

Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.

remote · szum.io

Claude Codex opencode OpenClaw Hermes Other

# add to Claude Code

claude mcp add --transport http io-szum-charts https://szum.io/mcp

# ~/.codex/config.toml

[mcp_servers.io-szum-charts]
url = "https://szum.io/mcp"

// opencode.json

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "io-szum-charts": {
      "type": "remote",
      "url": "https://szum.io/mcp",
      "enabled": true
    }
  }
}

# add to OpenClaw

openclaw mcp add io-szum-charts --url https://szum.io/mcp --transport streamable-http

# ~/.hermes/config.yaml

mcp_servers:
  io-szum-charts:
    url: "https://szum.io/mcp"

// mcp.json

{
  "mcpServers": {
    "io-szum-charts": {
      "type": "http",
      "url": "https://szum.io/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog Show cosmetic changes

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

3 Aug 26 +1
- The server rewrote its instructions, which are the text every model session reads security
- Tool “validate_chart” rewrote its description, which is the text the model reads security
2 Aug 26 +1
- The server rewrote its instructions, which are the text every model session reads security
- Schema quality: fail → pass ▲ functional
- “save_chart” reworded the description of “config” cosmetic
- “render_chart” reworded the description of “config” cosmetic
- “update_chart” reworded the description of “config” cosmetic
- “validate_chart” reworded the description of “config” cosmetic
1 Aug 26 +1

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.
31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
30 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
28 Jul 26 +1

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
27 Jul 26 −1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
26 Jul 26 67

First indexed and scored.

Show 6 earlier entries Hide earlier entries

Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 3 Aug 2026 · Probed https://szum.io/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject	Issuer	Valid from	Valid until	Key	Signature	Serial
CN=szum.io	CN=WE1,O=Google Trust Services,C=US	29 Jul 2026	27 Oct 2026	ECDSA 256	ECDSA-SHA256	4792d293ad781f8e1385800ad091cb21
SANs: szum.io, *.szum.io
CN=WE1,O=Google Trust Services,C=US (CA)	CN=GTS Root R4,O=Google Trust Services LLC,C=US	13 Dec 2023	20 Feb 2029	ECDSA 256	ECDSA-SHA384	7ff31977972c224a76155d13b6d685e3
CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA)	CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE	15 Nov 2023	28 Jan 2028	ECDSA 384	SHA256-RSA	7fe530bf331343bedd821610493d8a1b

DNSSEC insecure

Validation of szum.io. — Not signed

Zone	DS	Keys	Algorithms	Outcome
.	trust_anchor	20326, 38696	8, 8	Verified
io.	present	57355	8	Verified
szum.io.	absent			Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation

Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result	No authorisation required
HTTP status	200

Header	Value
strict-transport-security	max-age=31536000; includeSubDomains
x-content-type-options	nosniff
referrer-policy	strict-origin-when-cross-origin

Transports 2 probes

Transport	URL	Outcome	Status	Location
streamable-http	https://szum.io/mcp	Verified	200
http (plaintext)	http://szum.io/mcp	HTTPS enforced	301	https://szum.io/mcp

MCP tools — 13 exposed · ~1,234 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability.

Tool Tokens

delete_chart Delete chart ~55

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.

Input Output Examples

Name	Type	Req	Description
id	string	yes	Opaque 32-character saved-chart id

Name	Type	Req	Description
deleted	boolean	yes	—

No examples provided.

get_chart Get chart ~62

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 config; requires authentication.

Input Output Examples

Name	Type	Req	Description
id	string	yes	Opaque 32-character saved-chart id

Name	Type	Req	Description
configUrl	string	yes	Owner-only chart-config endpoint
createdAt	string	yes	ISO-8601 creation timestamp
editUrl	string	yes	—
embedUrl	string	yes	Interactive-embed URL
id	string	yes	Opaque 32-character saved-chart id
imageUrl	string	yes	Rendered-image URL
manageUrl	string	yes	—
publishedAt	—	yes	ISO-8601 publish timestamp, or null when public URLs are dark
sizeBytes	integer	yes	Compressed size of the stored published config, excluding drafts; 0 means no published config has been stored yet
source	string	yes	Chart origin; an open set of string values
title	string	yes	Saved chart title
updatedAt	string	yes	ISO-8601 last-update timestamp
view	string	yes	—

No examples provided.

get_chart_config Get chart config ~59

Use this when the user identifies a saved chart by id and needs its complete published Szum config for inspection or reuse. Does not return a newer editor draft; requires authentication.

Input Output Examples

Name	Type	Req	Description
id	string	yes	Opaque 32-character saved-chart id

Name	Type	Req	Description
attribution	boolean	—	Show a small "Made with Szum" credit in the bottom-right. Always on for free and keyless renders; Creator and Pro omit it by default and set true to opt in.
color	—	—	—
data	array	—	—
footer	string	—	Caption below the chart (a source line, methodology note, date). URLs, bare domains, and [label](url) links in it are auto-detected and rendered as inline links on every surface.
format	string	yes	—
headerAlign	string	—	—
height	integer	—	—
locale	string	—	Locale identifier accepted by JavaScript Intl and associated with the chart content, such as en, pl, or zh-Hant.
margin	object	—	—
marks	array	yes	—
plotHeight	integer	—	—
plotWidth	integer	—	—
scale	integer	—	—
subtitle	string	—	—
theme	string	—	—
themeOverrides	object	—	—
title	string	—	—
version	string	yes	—
width	integer	—	—
x	object	—	—
y	object	—	—

No examples provided.

get_examples Get example charts ~49

Use this when the model needs current, ready-to-use Szum chart configs or preferred semantic patterns. Optionally filters examples by mark type.

Input Output Examples

Name	Type	Req	Description
mark_type	string	—	Filter examples by mark type

Name	Type	Req	Description
examples	array	yes	—

No examples provided.

get_preview_state Get chart preview state ~64

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.

Input Output Examples

Name	Type	Req	Description
previewId	string	yes	Opaque 16-character chart-preview id

Name	Type	Req	Description
chart	object	—	—
status	string	yes	—

No examples provided.

list_charts List charts ~165

Use this when the user wants to find charts in their saved library. Returns paginated metadata and URLs, not chart configs; requires authentication. Draft-only editor charts have publishedAt null, hasDraft true, and sizeBytes 0 because sizeBytes measures only the stored published config, not draft storage.

Input Output Examples

Name	Type	Req	Description
cursor	string	—	Opaque nextCursor from the previous page
limit	integer	—	Page size; defaults to 100 and has a maximum of 1000
q	string	—	Case-insensitive title substring search; trimmed and limited to 100 characters
sort	string	—	Sort by creation time (default), update time, or title A-Z
source	—	—	Filter by one or more chart sources; omit to list all

Name	Type	Req	Description
items	array	yes	—
nextCursor	—	yes	Opaque cursor for the next page, or null on the last page
total	integer	—	Exact match count, present only for title searches

No examples provided.

list_marks List mark types ~28

Use this when choosing or configuring chart mark types. Returns every available mark with its properties and defaults.

Input Output Examples

Input schema present but exposes no named parameters.

Name	Type	Req	Description
marks	array	yes	—
shared	object	yes	—

No examples provided.

list_themes List themes ~32

Use this when choosing a visual theme for a chart. Returns every available theme and guidance on where each works best.

Input Output Examples

Input schema present but exposes no named parameters.

Name	Type	Req	Description
themes	array	yes	—

No examples provided.

rename_chart Rename chart ~71

Use this when the user wants to change a saved chart's library title without changing its config, publication state, or public URLs; requires authentication.

Input Output Examples

Name	Type	Req	Description
id	string	yes	Opaque 32-character saved-chart id
title	string	yes	New saved-chart title; trimmed and limited to 200 characters

Name	Type	Req	Description
configUrl	string	yes	Owner-only chart-config endpoint
createdAt	string	yes	ISO-8601 creation timestamp
editUrl	string	yes	—
embedUrl	string	yes	Interactive-embed URL
id	string	yes	Opaque 32-character saved-chart id
imageUrl	string	yes	Rendered-image URL
manageUrl	string	yes	—
publishedAt	—	yes	ISO-8601 publish timestamp, or null when public URLs are dark
sizeBytes	integer	yes	Compressed size of the stored published config, excluding drafts; 0 means no published config has been stored yet
source	string	yes	Chart origin; an open set of string values
title	string	yes	Saved chart title
updatedAt	string	yes	ISO-8601 last-update timestamp
view	string	yes	—

No examples provided.

render_chart Render chart ~159

Use this when the user wants to preview or generate a chart from a Szum config after preflighting a generated or materially changed config with validate_chart. Stores a one-hour preview and returns a public image URL; authenticated calls use the account's render allowance.

Input Output Examples

Name	Type	Req	Description
config	string	yes	JSON string of a complete chart config. Mark field references must match row keys. Chronological annual values use "YYYY" strings on an explicit UTC scale. Configure axes with top-level x and y; hide…

Name	Type	Req	Description
expiresAt	string	yes	—
format	string	yes	—
imageUrl	string	yes	—
mimeType	string	yes	—
title	string	yes	—
view	string	yes	—

No examples provided.

save_chart Save chart ~146

Use this when the user wants to permanently save and publish a chart from a Szum config. Returns permanent public Image and Embed URLs plus Edit and Studio links; requires authentication and saved-chart storage.

Input Output Examples

Name	Type	Req	Description
config	string	yes	JSON string of a complete chart config. Mark field references must match row keys. Chronological annual values use "YYYY" strings on an explicit UTC scale. Configure axes with top-level x and y; hide…

Name	Type	Req	Description
editUrl	string	yes	—
embedUrl	string	yes	—
format	string	yes	—
id	string	yes	—
imageUrl	string	yes	—
manageUrl	string	yes	—
mimeType	string	yes	—
title	string	yes	—
view	string	yes	—

No examples provided.

update_chart Update chart ~159

Use this when the user wants to replace and publish a saved chart's config while keeping its id and URLs. Refuses charts with unpublished editor changes; requires authentication and saved-chart storage.

Input Output Examples

Name	Type	Req	Description
config	string	yes	JSON string of a complete chart config. Mark field references must match row keys. Chronological annual values use "YYYY" strings on an explicit UTC scale. Configure axes with top-level x and y; hide…
id	string	yes	Opaque 32-character saved-chart id

Name	Type	Req	Description
configUrl	string	yes	Owner-only chart-config endpoint
createdAt	string	yes	ISO-8601 creation timestamp
editUrl	string	yes	—
embedUrl	string	yes	Interactive-embed URL
id	string	yes	Opaque 32-character saved-chart id
imageUrl	string	yes	Rendered-image URL
manageUrl	string	yes	—
publishedAt	—	yes	ISO-8601 publish timestamp, or null when public URLs are dark
sizeBytes	integer	yes	Compressed size of the stored published config, excluding drafts; 0 means no published config has been stored yet
source	string	yes	Chart origin; an open set of string values
title	string	yes	Saved chart title
updatedAt	string	yes	ISO-8601 last-update timestamp
view	string	yes	—

No examples provided.

validate_chart Validate chart config ~185

Use this when a chart config will be rendered, saved, or updated. You MUST call validate_chart with the exact current config before every render_chart, save_chart, or update_chart attempt and again after any change. Fix errors and warnings, then revalidate until none remain. Warnings may proceed only after explicit user approval; suggestions do not block. Read-only, free, and fast.

Input Output Examples

Name	Type	Req	Description
config	string	yes	JSON string of a complete chart config. Mark field references must match row keys. Chronological annual values use "YYYY" strings on an explicit UTC scale. Configure axes with top-level x and y; hide…

Name	Type	Req	Description
errors	array	yes	—
message	string	yes	—
valid	boolean	yes	—

No examples provided.

On this page

Handy links

Scoring key

80+ high trust
60–79 medium
below 60 low

How we score

Score history · last 30 days

26 Jul 3 Aug

Day	Score
26 Jul	67
27 Jul	66
28 Jul	67
29 Jul	67
30 Jul	68
31 Jul	68
1 Aug	69
2 Aug	70
3 Aug	71