"Ayuda para mejorar el diseño de aplicaciones en Flutter" matching MCP connectors:

Verify ZUGFeRD/Factur-X e-invoices, convert PDF invoices to ZUGFeRD, check VAT IDs and Peppol.

Reads and validates any European e-invoice a business receives — XRechnung, UBL, CII, ZUGFeRD/Factur-X PDF, Peppol BIS 3, FatturaPA, KSeF FA(3) — into canonical EN 16931 JSON with plain-language fix hints in EN/DE/PL/IT/FR, plus PDF, CSV and DATEV export. Nothing is stored; works without a key on a small daily quota.

QuickBooks Online in Claude and ChatGPT: 221 tools, full ledger, multi-company, Canada + US, FR/EN.

Generate, validate and read EN 16931 and Peppol BIS 3.0 e-invoices, in UBL and CII.

Daily history trivia EN/ES. Preview free; question $0.01, with answer $0.03 USDC (x402, Base).

XRechnung/ZUGFeRD erstellen, gegen EN 16931 prüfen, Fehler mit Regel-ID erklären. Ohne Konto.

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Incorporate a German GmbH or UG in chat, then finish and pay on a secure link.

Comgás: 2nd Copy Download, official-source lookup. Platform-hosted, pay per query with prepaid credi

Generate & validate EN 16931 e-invoices (Factur-X, ZUGFeRD, XRechnung); verification certificates

Interest and penalty calculation for AI: apply simple or compound interest, penalty and official cor

SEFAZ BA: Emitir guia de IPVA, official-source lookup. Platform-hosted, pay per query with prepaid c

Receita Federal: Simples (Listagem de Períodos para Issuance de DAS), official-source lookup. Platfo

Prefeitura SP Jundiaí: Certificate Tributária de IPTU, official-source lookup. Platform-hosted, pay

DETRAN SC: Guias de Debts, official-source lookup. Platform-hosted, pay per query with prepaid credi

Prefeitura SP Sumaré: NFS-e (Nota Fiscal Eletrônica de Serviços), official-source lookup. Platform-h

Prefeitura RJ Rio de Janeiro: NFS-e (Nota Fiscal Eletrônica de Serviços), official-source lookup. Pl

Prefeitura MS Campo Grande: NFS-e (Nota Fiscal Eletrônica de Serviços), official-source lookup. Plat

FGTS: Guia de Arrecadação, official-source lookup. Platform-hosted, pay per query with prepaid credi

DETRAN RJ: Multas (Guia de Recolhimento de Multas), official-source lookup. Platform-hosted, pay per

DETRAN ES: Issuance de Documento Único de Arrecadação (DUA), official-source lookup. Platform-hosted