Sign inSign up
Download

Integrations: MCP

The ECU checksum MCP for Claude

Ask Claude to check or repair the checksum of a flash file on your PC. The CARTESIAN extension hands the file to the same engine the app uses and saves the repaired copy next to it.

Get the extension Supported control units
You

Repair the checksum of C:\Tuning\golf-stage1.bin

Claude
File
golf-stage1.bin
Control unit
Bosch EDC16C39
Checksum
3 of 4 blocks were right, 4 of 4 are right now
Repaired copy
C:\Tuning\golf-stage1-CKSUM.bin
An example of a repair as Claude reports it.
How it works

Three steps to the first repair

MCP, the Model Context Protocol, lets Claude use a tool on your computer. The CARTESIAN extension is such a tool: it reads the file you name and writes the answer back.

  1. 1

    Install the extension

    Download it from your account page and open it with Claude Desktop. It also runs in Claude Code.

  2. 2

    Paste your key

    Make a key on your account page, under Security, and put it into the extension's settings. The key belongs to the ULTIMATE plan.

  3. 3

    Ask Claude

    Name the file and say what you need: a check, or a repair. The repaired copy is saved next to your file as name-CKSUM.bin.

Tools

What Claude can do with your file

Four tools, three of them free. Claude picks the right one from what you ask.

ToolWhat it doesCost
Check a filecartesian_checksum_checkWhich control unit the file names, whether its checksum is right and whether it can be repaired.Free
Repair a filecartesian_checksum_repairA free reading first. A stale file is repaired and saved as a new copy; a file that is right or cannot be repaired costs nothing.One file of your day, only when a file is delivered
Supported control unitscartesian_checksum_supportedThe list on this page, filtered by a part of a name.Free
Your daycartesian_accountThe plan and how many files of today's allowance are used.Free
Good to know

Built like the app, used from a chat

Your file stays as it is

The file you name is never changed. The repair is a new file next to it, and never written over an existing one.

The same engine as the app

The extension holds no checksum code. A control unit or a checksum added to CARTESIAN works in Claude the same day, with nothing to update.

One allowance

A repair counts like a file in the app, from the same daily allowance, and appears in the app's History.

Correct or refused

Where a checksum cannot be repaired with certainty, such as a signed variant, the repair is refused and nothing is counted.

Coverage

Supported control units

Measured on real reads with the engine's own checksum code. The list follows the engine: it grows as control units are added.

243 checked and repaired219 checked only

Bosch

Continental

Delphi

Denso

Marelli

Valeo

Transtron

Visteon

Delco

Motorola

Temic

TRW

Phoenix

Sagem

A control unit that is not listed may still work. Checking a file is free, and the reading of your own file is the answer for it.

FAQ

Common questions

Which Claude apps does the checksum extension work with?

Claude Desktop on Windows and macOS, where the extension installs with a double click, and Claude Code. The Claude website and the phone apps cannot read a file from your PC, so they cannot use it.

Which plan includes the checksum for Claude?

The ULTIMATE plan. Checking a file is free; a repair counts as one file of the licence's daily allowance, the same allowance the app uses.

What happens to my file when Claude checks it?

It is sent to CARTESIAN for the reading, exactly as the app sends it, and the repaired copy is saved next to your file. The file itself is never changed.

My control unit is not in the list. Can I still try?

Yes. Checking a file is free, and the list only holds what was measured so far. Where CARTESIAN cannot repair a checksum with certainty it refuses, and nothing is counted.

Do I update the extension when new control units are added?

No. The extension holds no checksum code: a control unit or a checksum added to CARTESIAN works in Claude the same day.

Contact

Talk to the team

Questions, a licence, or a control unit you need added? Reach out and we will get back to you.

Email us

cartesianecu@gmail.com

Also available from our distributors