Chilean Law MCP Server

The BCN alternative for the AI age.

Query Chilean legislation -- from the Ley 19.628 de Protección de la Vida Privada and Código Penal to the Código Civil, Ley de Delitos Informáticos, and more -- directly from Claude, Cursor, or any MCP-compatible client.

Si estás construyendo herramientas legales, herramientas de cumplimiento normativo, o haciendo investigación jurídica chilena, esta es tu base de datos de referencia verificada.

Built by Ansvar Systems -- Stockholm, Sweden

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Por qué existe esto / Why This Exists

La investigación jurídica chilena está dispersa entre la Biblioteca del Congreso Nacional (BCN), el portal leychile.cl, y el Diario Oficial. Ya seas:

• Un abogado validando citas en un escrito o contrato
• Un oficial de cumplimiento verificando obligaciones bajo la Ley 19.628 o la nueva Ley 21.719 de protección de datos personales
• Un desarrollador legal tech construyendo herramientas sobre derecho chileno
• Un investigador trazando la evolución legislativa desde el BCN

...no deberías necesitar docenas de pestañas del navegador y referencias cruzadas manuales. Pregunta a Claude. Obtén la disposición exacta. Con contexto.

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

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Quick Start

Use Remotely (No Install Needed)

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

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

Client	How to Connect
Claude.ai	Settings > Connectors > Add Integration > paste URL
Claude Code	claude mcp add chilean-law --transport http https://chilean-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": {
    "chilean-law": {
      "type": "url",
      "url": "https://chilean-law-mcp.vercel.app/mcp"
    }
  }
}

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

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

Use Locally (npm)

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

Cursor / VS Code:

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

Example Queries

Una vez conectado, pregunta de forma natural (consultas en español):

• "¿Qué dice la Ley 19.628 sobre protección de datos personales?"
• "¿Está vigente la Ley 21.719 sobre protección de datos personales?"
• "Buscar disposiciones sobre 'responsabilidad civil' en el Código Civil chileno"
• "¿Qué dice el Código Penal sobre delitos informáticos?"
• "Buscar 'sociedad anónima' en el derecho societario chileno"
• "¿Qué dice la Ley de Defensa del Consumidor (Ley 19.496) sobre cláusulas abusivas?"
• "¿Cómo se cita correctamente el artículo 5 de la Ley 19.628?"
• "Buscar leyes chilenas que regulen la firma electrónica"

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What's Included

Category	Count	Details
Statutes	Ingestion in progress	Laws from BCN (bcn.cl) and leychile.cl
Provisions	Ingestion in progress	Full-text searchable with FTS5
Language	Spanish	Chile's official language
Daily Updates	Automated	Freshness checks against BCN / leychile.cl

Coverage note: The Chilean law database is actively being built. The MCP server infrastructure is production-ready. Provision counts will be updated as ingestion completes. The remote endpoint is live and returns available data.

Verified data only -- every citation is validated against official sources (BCN / leychile.cl). Zero LLM-generated content.

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See It In Action

Why This Works

Verbatim Source Text (No LLM Processing):

• All statute text is ingested from BCN (Biblioteca del Congreso Nacional) and leychile.cl
• Provisions are returned unchanged from SQLite FTS5 database rows
• Zero LLM summarization or paraphrasing -- the database contains statute text, not AI interpretations

Smart Context Management:

• Search returns ranked provisions with BM25 scoring (safe for context)
• Provision retrieval gives exact text by law number and article
• Cross-references help navigate without loading everything at once

Technical Architecture:

BCN / leychile.cl --> Parse --> SQLite --> FTS5 snippet() --> MCP response
                        ^                        ^
                 Provision parser         Verbatim database query

Traditional Research vs. This MCP

Traditional Approach	This MCP Server
Buscar en BCN por número de ley	Buscar en español: "protección de datos consentimiento"
Navegar artículos manualmente	Obtener la disposición exacta con contexto
Referencias cruzadas manuales entre leyes	build_legal_stance agrega de múltiples fuentes
"¿Está esta ley vigente?" -- verificar manualmente	check_currency -- respuesta en segundos
Buscar marcos internacionales -- revisar documentos OEA	get_eu_basis -- instrumentos internacionales vinculados
Sin API, sin integración	Protocolo MCP -- nativo para IA

Tradicional: Buscar en leychile.cl --> Descargar PDF --> Ctrl+F --> Verificar en Diario Oficial --> Repetir

This MCP: "¿Qué dice la nueva Ley 21.719 sobre protección de datos personales respecto al consentimiento?" --> Done.

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Available Tools (13)

Core Legal Research Tools (8)

Tool	Description
search_legislation	FTS5 full-text search across provisions with BM25 ranking
get_provision	Retrieve specific provision by law number and article
validate_citation	Validate citation against database (zero-hallucination check)
build_legal_stance	Aggregate citations from statutes for a legal topic
format_citation	Format citations per Chilean conventions (full/short/pinpoint)
check_currency	Check if a law is in force, amended, or repealed
list_sources	List all available statutes with metadata and data provenance
about	Server info, capabilities, dataset statistics, and coverage summary

International Law Integration Tools (5)

Tool	Description
get_eu_basis	Get international instruments that Chilean laws align with
get_chilean_implementations	Find Chilean laws implementing a specific international standard
search_eu_implementations	Search international documents with Chilean alignment counts
get_provision_eu_basis	Get international law references for a specific Chilean provision
validate_eu_compliance	Check alignment status of Chilean laws against international standards

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International Law Alignment

Chile is an active member of the Organization of American States (OAS) and a MERCOSUR associate member, participating in regional legal harmonization frameworks.

Framework	Relevance
OAS Inter-American Conventions	Chile has ratified the Inter-American Convention against Corruption and other OAS instruments
MERCOSUR	Associate member -- participates in Southern Common Market trade and regulatory frameworks
OECD	Chile joined OECD in 2010 -- implementation of OECD anti-bribery, tax, and governance standards
Trans-Pacific Partnership	Chile is a CPTPP member -- digital trade, IP, and data governance obligations

Chile's new data protection law (Ley 21.719, approved 2024) significantly updates the framework established by Ley 19.628, moving toward GDPR-equivalent standards. The international bridge tools help identify where Chilean law aligns with international standards.

Note: Chile is not an EU adequacy jurisdiction under GDPR, but the new Ley 21.719 substantially modernizes Chilean data protection to align with global best practices. The international tools help identify alignment relationships.

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Data Sources & Freshness

All content is sourced from authoritative Chilean legal databases:

• BCN -- Biblioteca del Congreso Nacional -- Official legislative library and research arm
• leychile.cl -- Official consolidated statute portal (BCN)
• Diario Oficial -- Chile's Official Gazette

Data Provenance

Field	Value
Authority	Biblioteca del Congreso Nacional de Chile
Retrieval method	BCN / leychile.cl consolidated statute database
Language	Spanish
License	Open access (official government sources)

Automated Freshness Checks (Daily)

A daily GitHub Actions workflow monitors BCN/leychile.cl for changes:

Check	Method
Law amendments	Drift detection against known provision anchors
New laws	Comparison against BCN index
Repealed laws	Status change detection

Verified data only -- every citation is validated against official sources. Zero LLM-generated content.

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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
Docker Security	Container image scanning + SBOM generation	Daily
Socket.dev	Supply chain attack detection	PRs
OSSF Scorecard	OpenSSF best practices scoring	Weekly
Dependabot	Automated dependency updates	Weekly

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

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Important Disclaimers

Legal Advice

THIS TOOL IS NOT LEGAL ADVICE

Statute text is sourced from BCN/leychile.cl (official Chilean legal publications). However:

• This is a research tool, not a substitute for professional legal counsel
• Court case coverage is not included -- do not rely solely on this for case law research
• Verify critical citations against primary sources (leychile.cl / Diario Oficial) for court filings
• Ley 21.719 (new data protection law) may have transitional provisions -- verify current status against BCN
• International cross-references reflect alignment relationships, not binding obligations

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.

For guidance from your bar association: Colegio de Abogados de Chile

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Documentation

• Integration Guide -- Detailed integration documentation
• Security Policy -- Vulnerability reporting and scanning details
• Disclaimer -- Legal disclaimers and professional use notices
• Privacy -- Client confidentiality and data handling

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Development

Setup

git clone https://github.com/Ansvar-Systems/Chilean-law-mcp
cd Chilean-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 ingest                          # Ingest statutes from BCN/leychile.cl
npm run ingest:all-laws-fulltext        # Full-text ingestion of all laws
npm run fetch:all-laws-index            # Fetch laws index from BCN
npm run build:db                        # Rebuild SQLite database
npm run drift:detect                    # Run drift detection against anchors
npm run verify:provisions               # Verify provision coverage
npm run check-updates                   # Check for amendments and new laws

Performance

• Search Speed: <100ms for most FTS5 queries
• Database Size: Optimized SQLite (efficient, portable)
• Reliability: Production-ready ingestion pipeline

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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:

@ansvar/eu-regulations-mcp

Query 49 EU regulations directly from Claude -- GDPR, AI Act, DORA, NIS2, MiFID II, eIDAS, and more. Full regulatory text with article-level search. npx @ansvar/eu-regulations-mcp

@ansvar/chilean-law-mcp (This Project)

Query Chilean legislation directly from Claude -- Ley 19.628, Ley 21.719, Código Civil, Código Penal, and more. npx @ansvar/chilean-law-mcp

@ansvar/peruvian-law-mcp

Query Peruvian legislation -- Ley 29733, Código Civil, Código Penal, and more. npx @ansvar/peruvian-law-mcp

@ansvar/uruguayan-law-mcp

Query Uruguayan legislation -- Ley 18.331, Código Civil, Código Penal, and more. npx @ansvar/uruguayan-law-mcp

@ansvar/security-controls-mcp

Query 261 security frameworks -- ISO 27001, NIST CSF, SOC 2, CIS Controls, SCF, and more. npx @ansvar/security-controls-mcp

70+ national law MCPs covering Africa, the Americas, Europe, Asia, and more.

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Contributing

Contributions welcome! See CONTRIBUTING.md for guidelines.

Priority areas:

• Full statute corpus ingestion from BCN
• Supreme Court (Corte Suprema de Chile) case law
• Ley 21.719 (new data protection law) full coverage
• Historical statute versions and Diario Oficial amendment tracking

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Roadmap

• MCP server infrastructure (production-ready)
• International law alignment tools
• Vercel Streamable HTTP deployment
• npm package publication
• Full statute corpus ingestion from BCN/leychile.cl
• Court case law (Corte Suprema de Chile)
• Ley 21.719 full-text with transitional provisions
• Historical statute versions (Diario Oficial tracking)
• OECD and OAS cross-reference database

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Citation

If you use this MCP server in academic research:

@software{chilean_law_mcp_2026,
  author = {Ansvar Systems AB},
  title = {Chilean Law MCP Server: AI-Powered Legal Research Tool},
  year = {2026},
  url = {https://github.com/Ansvar-Systems/Chilean-law-mcp},
  note = {Chilean legislation sourced from Biblioteca del Congreso Nacional (BCN) and leychile.cl}
}

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License

Apache License 2.0. See LICENSE for details.

Data Licenses

• Statutes: Biblioteca del Congreso Nacional de Chile (open access)
• International Metadata: Public domain treaty databases

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About Ansvar Systems

We build AI-accelerated compliance and legal research tools for the global market. This MCP server brings Chile's official legislation into any AI client -- no browser tabs, no PDFs, no manual cross-referencing.

ansvar.eu -- Stockholm, Sweden

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_{Built with care in Stockholm, Sweden}