DataClean

Name: DataClean
Author: ArceeDev

by ArceeDevversion 0.2.0i★ –iComputer or cloud

Registry nameio.github.ArceeDev/dataclean-mcp

Install

Overview

Description from the maker (original English)

Profile, clean and validate CSV/Excel data: schemas, dates, numbers, duplicates. Never guesses.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi3 of 3 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Computer or cloud
Transport: stdio, Streamable HTTP
Category: Docs, sheets & office work
You need to fill in: KEYFLINT_LICENSE

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 3 of 3 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: KEYFLINT_LICENSE

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet
PyPIPython’s uv installed (for the uvx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://mcp.keyflint.dev/dataclean/mcp

Or run it on your computer

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "dataclean": {
      "command": "uvx",
      "args": [
        "dataclean-mcp"
      ],
      "env": {
        "KEYFLINT_LICENSE": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add --transport http dataclean https://mcp.keyflint.dev/dataclean/mcp

Or run it on your computer

claude mcp add dataclean --env KEYFLINT_LICENSE=your-value -- uvx dataclean-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "dataclean": {
      "url": "https://mcp.keyflint.dev/dataclean/mcp"
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "dataclean": {
      "command": "uvx",
      "args": [
        "dataclean-mcp"
      ],
      "env": {
        "KEYFLINT_LICENSE": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "dataclean": {
      "type": "http",
      "url": "https://mcp.keyflint.dev/dataclean/mcp"
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "dataclean": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "dataclean-mcp"
      ],
      "env": {
        "KEYFLINT_LICENSE": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://mcp.keyflint.dev/dataclean/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

KEYFLINT_LICENSE secret required env
Your KeyFlint license (LIC-...). Get one, free trial included, at https://mcp.keyflint.dev

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

The server asks you to sign in before it lists its tools.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account ArceeDev, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
✓ Pass
Endpoint responds
Responded in 84 ms (HTTP 401)
✓ Pass
Sign-in with OAuth
Declares OAuth sign-in, so your AI app can take you to log in
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Docs, sheets & office worki

More stars than 0% of the other 2191 servers in this category
Published to the registry more recently than 100% of the other 2191 servers in this category
Basic checks equal to or better than 100% of the other 2191 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is DataClean safe?

It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: KEYFLINT_LICENSE

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.0) reached the registry today.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Agent-Native Calendar

by BuilderIO

Agent-Native Google Calendar - manage events, sync, and public booking

Runs in the cloud★ 7,620MITUpdated 2 months ago

Install

Excel MCP Server

by haris-musa

Lets AI create and edit Excel files itself, including formulas, charts and PivotTables, without Excel installed.

Runs on your computer★ 4,276MITUpdated 6 days ago

Install

MCP Server for Excel

by sbroenne

Excel automation for AI - Sheets, Power Query, DAX, VBA, Tables, Ranges and more. Windows only.

Runs on your computer★ 847MITUpdated 3 days ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

dataclean-mcp

An MCP server that cleans tables deterministically before an AI agent reasons over them. LLMs misread 1.250,50 €, swap day and month in 03/04/2026, choke on NUL bytes and mojibake (CafÃ©), and silently drop leading zeros. DataClean fixes these with rules, and it never guesses: an ambiguous value is kept as it was and flagged, and it is converted only when the rest of its column (or a parameter you pass) settles its meaning.

Tool	Credits	What it does
`profile_table`	1	Encoding, delimiter, header row, and for each column: real type (integer, decimal, date, datetime, boolean, email, url, phone, iban, text), number locale, date order, currency, nulls, distinct values, min/max, examples and problems. Also reports duplicate rows and a suggested schema.
`clean_table`	1	Returns a clean, typed copy as CSV, TSV, JSON, JSONL or typed .xlsx: text trimmed and repaired, numbers as plain decimals, dates in ISO 8601, phones in E.164, IBANs compacted, rows deduplicated, headers made unique or snake_case. Every value left unconverted is listed with its source row.
`validate_schema`	1	Checks every row against a schema (type, required, unique, min/max, min_length/max_length, enum, pattern) and returns errors with their row numbers.
`normalize_values`	1	Normalizes a list of up to 10,000 values (amounts, dates, phones, emails…) taken from a document or another tool.
`pricing`, `credits_balance`	0	Free helpers.

Charging works like this:

Unreadable input or invalid parameters are refused before any credits are charged.
A failure after charging is refunded.

What it fixes

Numbers: 1.250,50 €, $1,250.50, 1 234,5, 1'234.50, (45.30), SAP-style 1.250,50-, 12,5 %, EUR 12. The column decides whether a value like 1,250 uses a thousands or a decimal separator. If nothing in the column decides it, number_locale does, and without either the value is flagged ambiguous_number.
Dates: ISO, 13/04/2026 (day-first), 04/13/2026 (month-first), 5 de marzo de 2026, March 5, 2026, 5-Mar-26, 3. März 2026, and times with am/pm. 03/04/2026 is converted only when another value in the column, or date_order, settles the order. Dates in the minority order are flagged date_order_conflict.
Text: removes NUL, control and zero-width characters, turns NBSP into a normal space, repairs mojibake, applies Unicode NFC, and collapses and trims spaces. Null markers (NULL, N/A, #N/A, -, nan…) become empty.
IDs: digit strings with leading zeros or more than 15 digits (zip codes, card numbers, references) stay text and are never turned into numbers.
Files: CSV in UTF-8, UTF-16 or Windows-1252, delimiter detected automatically (, ; tab |), title rows above the header skipped, ragged rows padded, duplicate or empty headers renamed. Also reads .xlsx (via base64) and JSON/JSONL.
Safety: in CSV output, text cells starting with = + - @ get a ' prefix so spreadsheets do not run them as formulas. In .xlsx output they are stored as strings. Schema regexes with nested quantifiers are refused (ReDoS).

Install

Buy credits at https://mcp.keyflint.dev to get a license (LIC-...).
Add the server to your client:

"mcpServers": { "dataclean": { "command": "uvx", "args": ["dataclean-mcp"], "env": { "KEYFLINT_LICENSE": "LIC-..." } } } }

Claude Desktop also installs the .mcpb bundle attached to each GitHub release. Hosted mode runs dataclean-mcp --http (or uses the Dockerfile) and reads the license from each request's Authorization: Bearer LIC-... header.

Limits (set by environment variables): DATACLEAN_MAX_BYTES (20 MB), DATACLEAN_MAX_ROWS (200,000), DATACLEAN_MAX_OUTPUT (15 MB). Credit prices can be overridden with DATACLEAN_PRICES=clean_table=2,....

Visual cards (MCP Apps)

In Claude, ChatGPT, VS Code and Goose every paid tool and credits_balance renders as an interactive card in the chat: credit balance with a refill bar and a buy button, or a result summary (key figures, issues, table preview and credits charged). It is the ui://dataclean/card.html resource, self-contained with no network access. Other clients keep getting the same JSON as before.

Tests

pip install -e '.[test]'

pytest -q

The tests use a fake KeyFlint gateway and locally signed licenses, so they need no network.

License

Business Source License 1.1. Production use requires a KeyFlint license from the Licensor. On 2030-11-05 the code becomes Apache 2.0.

DataClean

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Or run it on your computer

Or run it on your computer

Or run it on your computer

Or run it on your computer

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Docs, sheets & office worki

Common questions

Alternatives

Agent-Native Calendar

Excel MCP Server

MCP Server for Excel

README from the maker

dataclean-mcp

What it fixes

Install

Visual cards (MCP Apps)

Tests

License