@ansvar/mexican-law-mcp

v2.0.0

Published

a day ago

Mexican federal law database covering data protection (LFPDPPP), fintech, cybercrime, commercial law, and consumer protection with Spanish full-text search

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mcp model-context-protocol mexican-law lfpdppp data-protection fintech cybercrime inai consumer-protection legislation legal compliance latin-america ansvar

Mexican Law MCP Server

The Camara de Diputados alternative for the AI age.

Query 185 Mexican federal statutes -- from the Constitucion and LFPDPPP to the Ley Fintech, Codigo Penal Federal, and more -- directly from Claude, Cursor, or any MCP-compatible client.

If you're building legal tech, compliance tools, or doing Mexican legal research, this is your verified reference database.

Built by Ansvar Systems -- Stockholm, Sweden

Why This Exists

Mexican legal research is scattered across diputados.gob.mx, the Diario Oficial de la Federacion, ordenjuridico.gob.mx, and dozens of state-level sites. Whether you're:

A lawyer validating citations in a contract or brief
A compliance officer checking data protection requirements (LFPDPPP, LGPDPPSO)
A legal tech developer building tools on Mexican law
A fintech company navigating Ley Fintech requirements
A researcher tracing legislative reforms

...you shouldn't need 47 browser tabs and manual PDF cross-referencing. Ask Claude. Get the exact provision. With context.

This MCP server makes Mexican law searchable, cross-referenceable, and AI-readable.

Quick Start

Use Remotely (No Install Needed)

Connect directly to the hosted version -- zero dependencies, nothing to install.

Endpoint: https://mexican-law-mcp.vercel.app/mcp

| Client | How to Connect | |--------|---------------| | Claude.ai | Settings > Connectors > Add Integration > paste URL | | Claude Code | claude mcp add mexican-law --transport http https://mexican-law-mcp.vercel.app/mcp | | Claude Desktop | Add to config (see below) | | GitHub Copilot | Add to VS Code settings (see below) |

Claude Desktop -- add to claude_desktop_config.json:

{
  "mcpServers": {
    "mexican-law": {
      "type": "url",
      "url": "https://mexican-law-mcp.vercel.app/mcp"
    }
  }
}

GitHub Copilot -- add to VS Code settings.json:

{
  "github.copilot.chat.mcp.servers": {
    "mexican-law": {
      "type": "http",
      "url": "https://mexican-law-mcp.vercel.app/mcp"
    }
  }
}

Use Locally (npm)

npx @ansvar/mexican-law-mcp

Claude Desktop -- add to claude_desktop_config.json:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "mexican-law": {
      "command": "npx",
      "args": ["-y", "@ansvar/mexican-law-mcp"]
    }
  }
}

Cursor / VS Code:

{
  "mcp.servers": {
    "mexican-law": {
      "command": "npx",
      "args": ["-y", "@ansvar/mexican-law-mcp"]
    }
  }
}

Example Queries

Once connected, just ask naturally:

"What does Article 1 of the LFPDPPP say about data protection scope?"
"Find provisions about datos personales in Mexican law"
"What are the cybercrime provisions in the Codigo Penal Federal?"
"What does the Ley Fintech say about virtual assets?"
"List all Mexican federal laws related to consumer protection"
"What are the ARCO rights under Mexican data protection law?"
"Find provisions about firma electronica in the e-signature law"
"What does Article 6 of the Constitution say about the right to information?"

What's Included

| Category | Count | Details | |----------|-------|---------| | Constitution | 1 | Constitucion Politica de los Estados Unidos Mexicanos | | Federal Codes | 9 | Civil, Commercial, Criminal, Tax, Procedure, Military Justice | | Federal Laws | 116 | Data protection, fintech, telecom, labor, competition, etc. | | General Laws | 43 | Health, education, environment, transparency, anti-corruption | | Organic Laws | 9 | Judiciary, Congress, Public Administration, Attorney General | | Regulatory Laws | 6 | Agrarian, mining, nuclear energy, professional practice | | Other | 1 | Statutes | | Total Statutes | 185 | Comprehensive Mexican federal legislation | | Provisions | 583 | Full-text searchable with FTS5 (unicode61 for Spanish) | | Definitions | 56 | Legal term definitions extracted from statutes | | Database Size | ~0.7 MB | Optimized SQLite, portable |

Verified data only -- every citation is validated against official sources (diputados.gob.mx). Zero LLM-generated content.

Key Law Categories

Data Protection and Privacy

LFPDPPP -- Federal Law on Protection of Personal Data Held by Private Parties (2010)
LGPDPPSO -- General Law on Protection of Personal Data Held by Public Bodies (2017)

Financial Technology and Banking

Ley Fintech -- Law to Regulate Financial Technology Institutions (2018)
LIC -- Credit Institutions Law
LMV -- Securities Market Law
Ley Banxico -- Bank of Mexico Law

Cybercrime and Digital

Codigo Penal Federal -- Federal Criminal Code (Articles 211 bis 1-7: cybercrime)
Ley de Firma Electronica -- Advanced Electronic Signature Law (2012)
Codigo de Comercio -- Commercial Code (e-commerce provisions)

Consumer Protection and Competition

LFPC -- Federal Consumer Protection Law
LFCE -- Federal Economic Competition Law

Corporate and Commercial

LGSM -- General Law on Commercial Companies
Ley de Concursos -- Commercial Insolvency Law

Anti-Money Laundering

Ley Antilavado -- Federal Anti-Money Laundering Law

Transparency and Access to Information

LFTAIP -- Federal Transparency and Access to Public Information Law
LGTAIP -- General Transparency and Access to Public Information Law

Available Tools (8)

Core Legal Research Tools (8)

| Tool | Description | |------|-------------| | search_legislation | FTS5 search on 583 provisions with BM25 ranking | | get_provision | Retrieve specific provision by law + article number | | list_laws | List all 185 statutes with metadata | | get_preparatory_works | Get linked reform history for a statute | | validate_citation | Validate citation against database (zero-hallucination check) | | build_legal_stance | Aggregate citations from multiple statutes | | format_citation | Format citations per Mexican conventions (DOF reference) | | check_currency | Check if statute is in force, amended, or repealed |

Data Sources and Freshness

All content is sourced from authoritative Mexican legal databases:

Camara de Diputados -- Official federal legislation compilation
Diario Oficial de la Federacion -- Official gazette for all legislation
Orden Juridico Nacional -- Federal Legal Order reference

Automated Freshness Checks (Daily)

A daily GitHub Actions workflow monitors data sources for reforms published in the Diario Oficial de la Federacion.

Security

This project uses multiple layers of automated security scanning:

| Scanner | What It Does | Schedule | |---------|-------------|----------| | CodeQL | Static analysis for security vulnerabilities | Weekly + PRs | | Semgrep | SAST scanning (OWASP top 10, secrets, TypeScript) | Every push | | Gitleaks | Secret detection across git history | Every push | | Trivy | CVE scanning on filesystem and npm dependencies | Daily | | Socket.dev | Supply chain attack detection | PRs | | Dependabot | Automated dependency updates | Weekly |

See SECURITY.md for the full policy and vulnerability reporting.

Important Disclaimers

Legal Advice

THIS TOOL IS NOT LEGAL ADVICE
Statute text is sourced from official Camara de Diputados publications. However:
This is a research tool, not a substitute for professional legal counsel
Verify critical citations against primary sources (DOF, diputados.gob.mx) for court filings
Mexican law is complex -- federal vs. state jurisdiction matters
Reforms may have transitional provisions not fully captured

Before using professionally, read: DISCLAIMER.md | PRIVACY.md

Client Confidentiality

Queries go through the Claude API. For privileged or confidential matters, use on-premise deployment. See PRIVACY.md for guidance.

Development

Setup

git clone https://github.com/Ansvar-Systems/mexican-law-mcp
cd mexican-law-mcp
npm install
npm run build
npm test

Running Locally

npm run dev                                       # Start MCP server
npx @anthropic/mcp-inspector node dist/index.js   # Test with MCP Inspector

Data Management

npm run census                             # Enumerate all federal laws
npm run ingest                             # Full corpus ingestion from census
npm run ingest -- --resume                 # Resume interrupted ingestion
npm run ingest -- --limit 5                # Test with 5 laws
npm run ingest -- --skip-fetch             # Reuse cached HTML
npm run build:db                           # Rebuild SQLite database
npm run check-updates                      # Check for amendments

Census-First Workflow

census.ts -> data/census.json (185 laws)
    |
ingest.ts -> data/seed/*.json (per-law provision JSON)
    |
build-db.ts -> data/database.db (SQLite + FTS5)

Performance

Search Speed: <100ms for most FTS5 queries
Database Size: ~0.7 MB (efficient, portable)
FTS5 Tokenizer: unicode61 (optimized for Spanish accented text)

Related Projects: Complete Compliance Suite

This server is part of Ansvar's Compliance Suite -- MCP servers that work together for end-to-end compliance coverage:

Contributing

Contributions welcome! See CONTRIBUTING.md for guidelines.

Priority areas:

Full corpus re-ingestion when diputados.gob.mx is accessible
State-level legislation coverage
Reglamentos (federal regulations) ingestion
Jurisprudencia (judicial precedent) integration
English translations for key statutes

Roadmap

[x] Census-first architecture -- 185 federal laws enumerated
[x] Core law ingestion -- LFPDPPP, Ley Fintech, Codigo Penal, and 7 more fully parsed
[x] FTS5 with unicode61 -- Optimized for Spanish text search
[ ] Full corpus re-ingestion (pending diputados.gob.mx availability)
[ ] Reglamentos coverage (80+ federal regulations)
[ ] State-level legislation
[ ] Jurisprudencia (SCJN case law)
[ ] English translations for key statutes

Citation

If you use this MCP server in academic research:

@software{mexican_law_mcp_2026,
  author = {Ansvar Systems AB},
  title = {Mexican Law MCP Server: Federal Legislation Research Tool},
  year = {2026},
  url = {https://github.com/Ansvar-Systems/mexican-law-mcp},
  note = {185 Mexican federal statutes with Spanish full-text search}
}

License

Apache License 2.0. See LICENSE for details.

Data Licenses

Federal Legislation: Mexican Government (public domain under Article 14 of the Federal Copyright Law -- government works are not subject to copyright)
Source: Camara de Diputados, diputados.gob.mx/LeyesBiblio

About Ansvar Systems

We build AI-accelerated compliance and legal research tools. This MCP server makes Mexican federal law searchable, cross-referenceable, and AI-readable.

ansvar.eu -- Stockholm, Sweden