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Lex API MX — servidor MCP

Servidor Model Context Protocol que conecta Claude Desktop, Claude Code, Cursor o cualquier agente MCP con la legislación federal mexicana vigente de Lex API MX.

El servidor es un adaptador ligero y de código abierto (MIT): no contiene el corpus. Cada llamada consulta la API de Lex API MX con tu clave y devuelve el paquete normativo tal cual, con cita canónica, vigencia, fuente oficial y checksum SHA-256 del texto.

Herramientas

Herramienta Endpoint Para qué
resolve_legal_citation POST /api/v1/resolve Resolver una cita o situación a un paquete normativo verificable.
search_mexican_law GET /api/v1/articulos/search Buscar artículos vigentes por texto, norma o materia.
get_norm_structure GET /api/v1/normas/{slug}/estructura Recorrer el árbol de una norma; el texto (include_text, por páginas de nodos con page) requiere un plan de la API.

Todas exigen fecha ("vigente" o YYYY-MM-DD). Las de búsqueda y resolución exigen además jurisdiccion; hoy la única cobertura es "federal".

Instalación

Requiere uv y una clave de Lex API MX. El plan gratuito incluye 500 créditos al mes: crea tu cuenta con tu correo y genera la clave en lexapi.mx/#cuenta.

{
  "mcpServers": {
    "lex-api-mx": {
      "command": "uvx",
      "args": ["lex-api-mx-mcp"],
      "env": { "LEX_API_MX_KEY": "tu_clave" }
    }
  }
}
  • Claude Desktop: Settings → Developer → Edit Config y pega el bloque anterior en claude_desktop_config.json; reinicia la aplicación.
  • Claude Code: claude mcp add lex-api-mx --env LEX_API_MX_KEY=tu_clave -- uvx lex-api-mx-mcp
  • Cursor: el mismo bloque en ~/.cursor/mcp.json (global) o .cursor/mcp.json (proyecto).

Pruébalo preguntando: ¿Cuáles son las causas de rescisión de la relación de trabajo sin responsabilidad para el patrón? Cita el artículo exacto.

Variables de entorno

Variable Obligatoria Valor por defecto
LEX_API_MX_KEY Sí —
LEX_API_MX_BASE_URL No https://api.lexapi.mx

Errores

Los errores de la API llegan al modelo como errores de herramienta legibles: clave inválida (401), permiso faltante (403), saldo agotado (402) y límite de peticiones (429).

Código fuente

github.com/Julio-Patron/lexapi-mx (licencia MIT). También está en el MCP Registry como io.github.Julio-Patron/lex-api-mx.

Metadata

Release files for lex-api-mx-mcp 0.2.1

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lex_api_mx_mcp-0.2.1-py3-none-any.whl Python 3 none any Details

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0.2.1 This release

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