Paraguay Invoices (SIFEN e-Kuatia via FacturaSend) MCP server

Issue a Paraguay electronic invoice (factura electrónica, Documento Electrónico for SIFEN / e-Kuatia) through FacturaSend, which generates, digitally signs and transmits it to the DNIT (tax authority) from YOUR OWN FacturaSend account — this server only forwards the call and never holds your certificate. It wraps POST /{tenant}/lote/create with a single DE. Amounts are in Paraguayan guaraníes (PYG), which have NO decimals — pass unit prices as INTEGERS, and prices are TAX-INCLUSIVE (IVA incluido). IVA (VAT) rate per line: 10 (standard), 5 (reduced), or 0 (exempt); the server liquidates the IVA portion locally (10% -> price*10/110, 5% -> price*5/105). Set draft=true to build the DE WITHOUT transmitting it to SIFEN (offline test, no fiscal effect). On success you get the 44-digit cdc, the numero (establecimiento-punto-numero), and the SIFEN estado (Aprobado / Aprobado con observacion / Rechazado). Required credential headers (set once in your MCP client, per-request, never stored): x-facturasend-tenant (your FacturaSend tenant/company id, in the URL path) + x-facturasend-key (your FacturaSend API key; the free test environments never reach SIFEN production). Optional owner-policy headers x-agentpay-max-amount / x-agentpay-approval-above / x-agentpay-allowed-tools.

Look up a previously-created Paraguay DE by its cdc (the 44-digit control code) OR by its FacturaSend internal id — pass exactly one of { cdc } or { id }. Wraps GET /{tenant}/de/cdc/{cdc} or GET /{tenant}/de/id/{id}. Returns the document metadata FacturaSend holds: id, cdc, fecha, situacion (SIFEN situation code), lote_id, lote_estado, and info_codigo/info_descripcion (e.g. "CDC duplicado"). To get the live SIFEN approval status use get_document_status instead. Safe to call anytime. Required credential headers (set once in your MCP client, per-request, never stored): x-facturasend-tenant (your FacturaSend tenant/company id, in the URL path) + x-facturasend-key (your FacturaSend API key; the free test environments never reach SIFEN production). Optional owner-policy headers x-agentpay-max-amount / x-agentpay-approval-above / x-agentpay-allowed-tools.

Consult the live SIFEN status of a Paraguay DE by its cdc — wraps POST /{tenant}/de/estado. FacturaSend queries DNIT/SIFEN and returns the estado: "Aprobado" (approved, fiscally valid), "Aprobado con observacion" (approved with an observation), or "Rechazado" (rejected — read respuesta_mensaje, fix, and re-issue). Also returns situacion, fecha, respuesta_codigo and respuesta_mensaje (the SIFEN message, e.g. "0260 Autorización del DE satisfactoria"). Required credential headers (set once in your MCP client, per-request, never stored): x-facturasend-tenant (your FacturaSend tenant/company id, in the URL path) + x-facturasend-key (your FacturaSend API key; the free test environments never reach SIFEN production). Optional owner-policy headers x-agentpay-max-amount / x-agentpay-approval-above / x-agentpay-allowed-tools.