FEC Checker (French accounting file pre-audit)

Name: FEC Checker (French accounting file pre-audit)
Author: vincenz-cdf

by vincenz-cdfversion 0.1.2i★ –iComputer or cloud

Registry nameio.github.vincenz-cdf/fec-lint

Install

Overview

Description from the maker (original English)

Validate French FEC accounting files and flag audit risks before a tax audit.

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: Accounting, finance & tax

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.
The registry lists no key to fill in.

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.apify.com/?tools=highfiddle/fec-checker

Or run it on your computer

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

{
  "mcpServers": {
    "fec-lint": {
      "command": "uvx",
      "args": [
        "fec-lint"
      ]
    }
  }
}

Run this in your terminal

claude mcp add --transport http fec-lint 'https://mcp.apify.com/?tools=highfiddle/fec-checker'

Or run it on your computer

claude mcp add fec-lint -- uvx fec-lint

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "fec-lint": {
      "url": "https://mcp.apify.com/?tools=highfiddle/fec-checker"
    }
  }
}

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": {
    "fec-lint": {
      "command": "uvx",
      "args": [
        "fec-lint"
      ]
    }
  }
}

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": {
    "fec-lint": {
      "type": "http",
      "url": "https://mcp.apify.com/?tools=highfiddle/fec-checker"
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "fec-lint": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "fec-lint"
      ]
    }
  }
}

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.apify.com/?tools=highfiddle/fec-checker

Menu names can differ slightly by plan and over time.

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

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 vincenz-cdf, 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 317 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 Accounting, finance & taxi

More stars than 0% of the other 2903 servers in this category
Published to the registry more recently than 80% of the other 2903 servers in this category
Basic checks equal to or better than 100% of the other 2903 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 FEC Checker (French accounting file pre-audit) 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?

The registry does not list a required key, though some servers ask you to sign in on first use.

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 (0.1.2) reached the registry 6 days ago.

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: Finance Toolkit, SolidInvoice, Korea Tax Calculator

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

Finance Toolkit

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Computer or cloud★ 5,496MITUpdated yesterday

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SolidInvoice

by SolidInvoice

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Runs in the cloud★ 981MITUpdated 8 days ago

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Korea Tax Calculator

by UpstageAI

Korean tax calculation and tax-audit judgment MCP: 96 tools with statutory citations.

Runs on your computer★ 97MITUpdated yesterday

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.

fec-lint

[English](#english) · [Français](#français)

Technical check, not tax advice. fec-lint checks the structure of a file against the published FEC format. It does not certify a file or replace an accountant's review.

Contrôle technique, pas un conseil fiscal. fec-lint vérifie la structure d'un fichier au regard du format FEC publié. Il ne certifie pas un fichier et ne remplace pas la revue d'un expert-comptable.

English

**Free structural linter for French FEC files (*Fichier des Écritures Comptables*, art. A47 A-1 LPF), as a command line tool and an MCP server.**

What file does it check?

The FEC your accounting software exports (look for "FEC" or "Export DGFiP" in its year-end menu); you don't build it by hand. It is a text file named SIRENFECAAAAMMJJ.txt (SIREN, FEC, closing date), tab- or pipe-separated, with this header and one line per accounting line:

JournalCode|JournalLib|EcritureNum|EcritureDate|CompteNum|CompteLib|CompAuxNum|CompAuxLib|PieceRef|PieceDate|EcritureLib|Debit|Credit|EcritureLet|DateLet|ValidDate|Montantdevise|Idevise

VE|Ventes|000039|20250610|411000|Clients|CLI001|Atelier Durand|F2025-06|20250610|Facture F2025-06 Atelier Durand|3960,00|0,00|||20250610||

Dates are AAAAMMJJ; amounts use a decimal comma and no thousands separator. CompAuxNum/CompAuxLib, EcritureLet/DateLet and Montantdevise/Idevise may be empty, but only in pairs; every other field is required. The FEC Checker page has the full column-by-column table. Synthetic examples are in tests/fixtures/.

Install

pipx install fec-lint

Command line

fec-lint 123456782FEC20251231.txt

123456782FEC20251231.txt: FAILED (encoding utf-8, separator pipe, lines 214)

error date_invalid x3: Non-existent date in EcritureDate. - line(s) 21, 22, 23 error date_format x3: Wrong date format in EcritureDate (expected AAAAMMJJ). - line(s) 64, 65, 66 Structure has errors. Full pre-audit (balance, numbering, risk signals): https://apify.com/highfiddle/fec-checker

--json prints the full result: {ok, file, errors[], warnings[], stats}.
--name 123456782FEC20251231.txt sets the name checked against SIRENFECAAAAMMJJ.txt.
--quiet hides the last line.
Exit code: 0 when the structure is OK, 1 on errors, 2 when a file cannot be read. Several files can be given at once.
A .zip holding exactly one .txt FEC is unpacked first.

MCP server

Add it to your MCP client (Claude Desktop, Claude Code, Cursor…):

"mcpServers": { "fec-lint": { "command": "uvx", "args": ["--from", "fec-lint", "fec-lint-mcp"] } } }

Without uv, install with pipx install fec-lint and use "command": "fec-lint-mcp". The server exposes one tool, lint_fec(path), which takes a local file path and returns the same JSON as --json.

Full pre-audit as a hosted MCP server. The paid FEC Checker (balance, numbering, risk signals, AI fix list) runs on Apify and is reachable over MCP. Users sign in with Apify OAuth; agents can pay with x402 by adding &payment=x402:

claude mcp add --transport http fec-checker "https://mcp.apify.com/?tools=highfiddle/fec-checker"

Free vs full pre-audit

Check	fec-lint (free)	FEC Checker on Apify
File name `SIRENFECAAAAMMJJ.txt`, SIREN key	✅	✅
Encoding, separator, 18 headers	✅	✅
Field formats: dates, amounts, mandatory fields, pairs	✅	✅
Balance per entry and for the whole file	—	✅
EcritureNum gaps and duplicates, ValidDate chronology	—	✅
Risk signals: weekends, holidays, round amounts, Benford, cash 53x, suspense 471, after year end	—	✅
Verdict, 0-100 score, AI-written fix list (FR/EN)	—	✅
Runs	locally, nothing leaves your machine	on Apify, pay per file

Français

**Linter structurel gratuit pour les FEC (*Fichier des Écritures Comptables*, art. A47 A-1 LPF), en ligne de commande et en serveur MCP.**

Quel fichier contrôle-t-il ?

Le FEC exporté par votre logiciel comptable (cherchez « FEC » ou « Export DGFiP » dans le menu de clôture) ; vous ne le construisez pas à la main. C'est un fichier texte nommé SIRENFECAAAAMMJJ.txt (SIREN, FEC, date de clôture), séparé par tabulations ou barres verticales, avec l'en-tête et le type de ligne montrés plus haut.

Les dates sont au format AAAAMMJJ ; les montants utilisent la virgule décimale, sans séparateur de milliers. CompAuxNum/CompAuxLib, EcritureLet/DateLet et Montantdevise/Idevise peuvent être vides, mais seulement par paires ; tous les autres champs sont obligatoires. La page FEC Checker détaille chaque colonne. Des exemples fictifs sont dans tests/fixtures/.

Installation

pipx install fec-lint

Ligne de commande

fec-lint 123456782FEC20251231.txt

--json affiche le résultat complet : {ok, file, errors[], warnings[], stats}.
--name 123456782FEC20251231.txt indique le nom à contrôler selon SIRENFECAAAAMMJJ.txt.
--quiet masque la dernière ligne.
Code de sortie : 0 si la structure est correcte, 1 en cas d'erreur, 2 si un fichier est illisible. Plusieurs fichiers peuvent être passés à la fois.
Un .zip contenant un seul FEC .txt est décompressé d'abord.

Les messages sont en anglais ; les codes de règle (date_invalid, header_missing…) sont stables.

Serveur MCP

Ajoutez-le à votre client MCP (Claude Desktop, Claude Code, Cursor…) avec la configuration ci-dessus. L'outil lint_fec(path) prend le chemin d'un fichier local et renvoie le même JSON que --json.

Pré-audit complet en serveur MCP hébergé. Le FEC Checker payant (équilibre, numérotation, signaux de risque, plan de correction IA) tourne sur Apify et s'utilise en MCP via https://mcp.apify.com/?tools=highfiddle/fec-checker (connexion Apify OAuth ; les agents peuvent payer en x402 avec &payment=x402).

Gratuit ou pré-audit complet

Contrôle	fec-lint (gratuit)	FEC Checker sur Apify
Nom `SIRENFECAAAAMMJJ.txt`, clé du SIREN	✅	✅
Encodage, séparateur, 18 colonnes	✅	✅
Formats : dates, montants, champs obligatoires, couples de champs	✅	✅
Équilibre par écriture et du fichier	—	✅
Ruptures et doublons d'EcritureNum, chronologie de ValidDate	—	✅
Signaux de risque : week-ends, jours fériés, montants ronds, Benford, caisse 53x, attente 471, après clôture	—	✅
Verdict, score 0-100, plan de correction rédigé par IA (FR/EN)	—	✅
Exécution	en local, rien ne quitte votre machine	sur Apify, paiement par fichier

Development

python -m venv .venv

.venv/bin/pip install -e ".[test]" # Windows: .venv\Scripts\pip pytest

The fixtures in tests/fixtures/ are synthetic FEC files (fictitious SIREN 123456782). MIT license.

FEC Checker (French accounting file pre-audit)

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

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 Accounting, finance & taxi

Common questions

Alternatives

Finance Toolkit

SolidInvoice

Korea Tax Calculator

README from the maker

fec-lint

English

What file does it check?

Install

Command line

MCP server

Free vs full pre-audit

Français

Quel fichier contrôle-t-il ?

Installation

Ligne de commande

Serveur MCP

Gratuit ou pré-audit complet

Development