CleanChart
REMOTE · WWW.CLEANCHART.APP
Clean messy tabular data and render publication-ready PNG charts from your AI assistant.
Available components
Last scanned (19 hours ago)
Scores higher than 53% of remote servers
Reachable. Last reached 4 Nov 2026.
Category Data and Analytics
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 → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 8 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- 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 Usability44
- 0% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Fail
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1184 tokens (~131/item across 9 items; 8 tools + 1 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management47
- Stability observed for 14 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage94
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 81% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 8 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
- Supports UI / widget rendering.Pass
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 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.
- 30 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.
- 28 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 26 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 23 Oct 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.
- 22 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- 21 Oct 26 61
First indexed and scored.
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 4 Nov 2026 · Probed https://www.cleanchart.app/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=cleanchart.app | CN=WE1,O=Google Trust Services,C=US | 25 Oct 2026 | 23 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | 635793946489445213af698857b3de20 |
| SANs: cleanchart.app, *.cleanchart.app | ||||||
| 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 |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of www.cleanchart.app. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| app. | present | 23684 | 8 | Verified |
| cleanchart.app. | 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=63072000 |
| content-security-policy | default-src 'self'; script-src 'self' 'unsafe-inline' https://cloud.umami.is https://accounts.google.com https://client.crisp.chat https://settings.crisp.chat https://*.clarity.ms; style-src 'self' 'unsafe-inline' https://client.crisp.chat https://fonts.googleapis.com; img-src 'self' data: https: blob:; font-src 'self' data: https://client.crisp.chat https://fonts.gstatic.com; connect-src 'self' https://cloud.umami.is https://api-gateway.umami.dev https://docs.google.com https://polar.sh https://api.polar.sh wss://client.crisp.chat https://client.crisp.chat https://*.execute-api.eu-north-1.amazonaws.com https://*.clarity.ms; worker-src 'self' blob:; child-src 'self' blob:; frame-src 'self' https://accounts.google.com https://game.crisp.chat; object-src 'none'; base-uri 'self'; form-action 'self'; frame-ancestors 'none' |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.cleanchart.app/api/mcp | Verified | 200 | |
| http (plaintext) | http://www.cleanchart.app/api/mcp | HTTPS enforced | 308 | https://www.cleanchart.app/api/mcp |
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. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
apply_data_fixes Apply data fixes ~206
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[]).
| Name | Type | Req | Description |
|---|---|---|---|
| data | array | yes | Tabular data as an array of row objects, e.g. [{"Month":"2026-01","Sales":120}, ...]. All rows should share the same keys (column names). |
| fixOptions | object | yes | Fix options object, e.g. {"remove_duplicates":true,"date_standardization":true,"date_columns":["Date"]} |
No output schema declared.
No examples provided.
claim_chart Claim purchased chart ~176
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.
| Name | Type | Req | Description |
|---|---|---|---|
| checkoutId | string | yes | – |
| purchaseId | string | yes | – |
| returnUrl | boolean | – | Set true to also get chartUrl, a 24h download link to the purchased PNG. This stores a copy on CleanChart's servers for 24 hours — leave unset for inline-only delivery. |
No output schema declared.
No examples provided.
create_checkout Create checkout ~162
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.
| Name | Type | Req | Description |
|---|---|---|---|
| chartType | string | – | single_chart only |
| config | object | – | single_chart only: validated chart config |
| data | array | – | single_chart only: the rows to render after payment |
| kind | string | yes | – |
No output schema declared.
No examples provided.
detect_data_issues Detect data issues ~112
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.
| Name | Type | Req | Description |
|---|---|---|---|
| data | array | yes | Tabular data as an array of row objects, e.g. [{"Month":"2026-01","Sales":120}, ...]. All rows should share the same keys (column names). |
No output schema declared.
No examples provided.
generate_chart Generate chart ~307
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.
| Name | Type | Req | Description |
|---|---|---|---|
| chartType | string | yes | Chart type id from list_chart_types |
| config | object | yes | Validated chart config |
| data | array | yes | Tabular data as an array of row objects, e.g. [{"Month":"2026-01","Sales":120}, ...]. All rows should share the same keys (column names). |
| returnUrl | boolean | – | Set true to also get chartUrl, a 24h download link to the PNG. This stores a copy of the rendered chart on CleanChart's servers for 24 hours — leave unset for the default privacy-preserving inline-on… |
No output schema declared.
No examples provided.
get_entitlements Get entitlements ~62
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.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
list_chart_types List chart types ~60
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.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
validate_chart_config Validate chart config ~92
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.
| Name | Type | Req | Description |
|---|---|---|---|
| chartType | string | yes | Chart type id from list_chart_types |
| config | object | yes | Chart config object (start from the type's defaultConfig) |
No output schema declared.
No examples provided.
How do I install the CleanChart MCP server?
CleanChart is a hosted endpoint at https://www.cleanchart.app/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · www.cleanchart.app
claude mcp add --transport http app-cleanchart-cleanchart 'https://www.cleanchart.app/api/mcp'
What is the CleanChart MCP server?
CleanChart is an MCP server listed in the public MCP registry as app.cleanchart/cleanchart. Clean messy tabular data and render publication-ready PNG charts from your AI assistant. This page covers its hosted endpoint (https://www.cleanchart.app/api/mcp).
Is the CleanChart MCP server safe to use?
CleanChart scores 67 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the CleanChart MCP server expose?
CleanChart exposes 8 tools: list_chart_types, validate_chart_config, detect_data_issues, apply_data_fixes, generate_chart, and 3 more. Their descriptions and schemas cost roughly 1,177 tokens of context every time the server is loaded.
Does the CleanChart MCP server require authentication?
No. We connected to CleanChart without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the CleanChart MCP server still maintained?
CleanChart is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.