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Catalogue/MCP servers/Mx Fiscal MCP Server

Mx Fiscal MCP Server

marco.odev · MCP server

Gives an AI assistant Mexican tax and banking capabilities. It validates RFC, CURP, CLABE and NSS numbers using their real check digits, converts CFDI invoice XML into structured data with each SAT code labelled, checks both RFCs and the arithmetic, asks the SAT's public service whether an invoice is still live and looks up the SAT's code tables. It can also generate fake people and companies as test data. It reads invoices rather than creating them, and needs no API keys, CSD certificate or PAC contract.

Written by ooruby from the README of mx-fiscal-mcp-server 1.1.0.

Not claimed by its maker. Is this yours? Prove it and answer the findings

Why it's useful

Your agent can validate Mexican identifiers with their real check-digit rules and read invoices without a certificate or a PAC contract.

What you could do with it

  1. 1Paste a CFDI invoice into the chat and ask your agent whether it is still valid at the SAT.
  2. 2Give your agent a mixed list of RFC, CURP, CLABE and NSS numbers to classify and validate.
  3. 3Generate valid fake people or companies with matching RFC, CURP and CLABE values to seed a test file.

Written from its documentation: what it says it can do, not what our checks found.

MFMCP serverFinance & ops

Maintenance

Not measured

No release date is on record for this package yet. The nightly publisher check records one as it reaches each npm package, about once every ten nights.

Release activity only: it says nothing about quality or safety, and a finished small package can be fine without releases. How it is measured

Not yet tested

What this does not cover

  • ·Everything. Treat it as you would software from anywhere else.

Receipt history: every signed receipt for every version of this listing, and what changed between them.

In its maker's words

MCP server for Mexican tax and banking data — validate RFC, CURP, CLABE and NSS, read CFDI 4.0 invoices, query the SAT status service and look up SAT catalogues. Read-only, no API keys required.

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How far this has been checked

Static scanned

What it establishes
Its published package, or for a hosted server its source repository at a recorded commit, was read file by file, without running it, by every check in our current scan.
What it does not
How it behaves when it runs, or anything the scan does not read yet: several rubric checks, the repository's history, and compiled code in folders named dist or build. For a hosted server, that the endpoint runs the code that was read. The ooruby Index sets out exactly what was read.
Exactly what was read
Version 1.1.0, the file with digest sha512-jCYqqplXMErTH9whX33aCECU+rZ1L62KNz0AUViON1rGDjZplbN7j15gqN2HJ95GLatlLe6scApiVFsUJnaJqw==, as the registry publishes it. A published version cannot be replaced, so this names the same bytes for anyone who checks.
Authentication
Runs locally. No hosted endpoint is listed for this package. You run it on your own machine, so there is no endpoint of ours to authenticate against.
How the rungs work

Adding it

Paste this into your client's MCP configuration.

{
  "mcpServers": {
    "mx-fiscal-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "mx-fiscal-mcp-server@1.1.0"
      ]
    }
  }
}

Or run it directly.

npx -y mx-fiscal-mcp-server@1.1.0

Pinned to 1.1.0, which is the version the findings above were found in. Drop the version to take whatever is newest, and the report on this page stops describing what you installed.

Where this came from

Registry
npm
Package
mx-fiscal-mcp-server
Version read
1.1.0
Resolved
2026-10-10
Open the source(opens in a new tab)

Built from source, attested

npm publishes a signed statement that this exact package was built from the repository below, at this commit. It is verifiable without taking our word for it.

Repository
github.com/ortamarco/mx-fiscal-mcp-server
Commit
bd84e719e94a
Built by
github.com/actions/runner/github-hosted
Registry publish attestation
signed by npm · 2026-10-10
Checked
2026-10-10

The badge, if this is your listing

It renders the current rung (static scanned) and links back here, where what that does and does not establish is one click away. It updates itself as the evidence deepens.

[![ooruby: static scanned](https://ooruby.com/api/badge/mx-fiscal-mcp-server)](https://ooruby.com/market/mx-fiscal-mcp-server)

About this listing

Kind
MCP server
Category
Finance & ops
Pricing
Free
Sandbox
No
Hosted
No
Updated
2026-10-07
Price
Free
Get it freeVisit maker
Rating
no reviews yet
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Verification records what our published tests found on a specific version at a specific date. It is not a warranty, and it does not certify that software is free of defects.