cobra-mcp

cobra-mcp

MCP server for SRI electronic invoicing in Ecuador, enabling AI agents to emit invoices, credit notes, retention documents, and more via natural language through the Cobra API.

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README

cobra-mcp — Servidor MCP de facturación electrónica SRI (Ecuador)

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El primer MCP de facturación electrónica del SRI de Ecuador. Factura al SRI hablándole a tu agente de IA. · 🌐 facturacobra.com/mcp · 📘 Docs / OpenAPI · 📇 En el registro oficial MCP como com.facturacobra/cobra.

Expone la facturación de Cobra (factura, nota de crédito, nota de débito, retención) como herramientas MCP para agentes de IA (Claude Desktop, Cursor, Claude Code). Es un cliente apátrida de la API Cobra /v1: no tiene base de datos ni ve tu certificado .p12 — la API hace todo el trabajo fiscal (firma, transmisión al SRI, validación, idempotencia).

¿Solo quieres usarlo? No necesitas clonar nada. Cobra corre un servidor MCP remoto en https://facturacobra.com/mcp. Genera una llave en facturacobra.com → Config → Desarrolladores y conéctate (ver Remoto). Este repo es para quien quiera self-hostear el bridge stdio o inspeccionar/contribuir.

Instalar

cd cobra-mcp && npm install

Configurar (Claude Desktop / Cursor)

Agrega a tu claude_desktop_config.json (o el equivalente de tu cliente):

{
  "mcpServers": {
    "cobra": {
      "command": "node",
      "args": ["/ruta/a/cobra-mcp/index.js"],
      "env": {
        "COBRA_API_KEY": "mfact_xxxxxxxx_...",
        "COBRA_API_URL": "https://facturacobra.com/api/v1"
      }
    }
  }
}
  • COBRA_API_KEY (requerida): tu llave de Cobra. Usa una llave sandbox (ambiente=1) para probar: nunca emite un comprobante fiscal real. Genera llaves con scopes read, emit, annul, contacts:write, products:write.
  • COBRA_API_URL (opcional): default https://facturacobra.com/api/v1.

Herramientas

whoami · consultar_ruc · emitir_factura · emitir_documento (factura/NC/ND/retención) · consultar_estado · listar_documentos · anular_documento · crear_contacto · crear_producto.

Ejemplo de uso desde el agente: "factura $10 de consultoría a consumidor final" → emitir_factura. La idempotencia es automática: reintentar con los mismos datos no duplica.

Contrato completo de la API: https://facturacobra.com/api/v1/docs

Remoto (HTTP, multi-tenant) — sin instalar nada

También hay un transporte HTTP (http.js) para hostear UNA instancia que atiende a todos los tenants: la llave viaja por request en Authorization: Bearer mfact_.... Los clientes MCP que soportan servidores remotos se conectan así:

{
  "mcpServers": {
    "cobra": {
      "url": "https://facturacobra.com/mcp",
      "headers": { "Authorization": "Bearer mfact_xxxxxxxx_..." }
    }
  }
}

Correr el server HTTP: MCP_PORT=4201 COBRA_API_URL=http://127.0.0.1:4099/api/v1 node http.js (detrás de nginx/TLS). Es stateless: cada POST /mcp es autocontenido. Salud: GET /health.

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