Hi - I answer from the OpenSmartRoute documentation: routing, the API, plans and quotas, self-hosting. Ask away, or open a support ticket if you need a person.
Grounded in the docs - follow a source before acting on it.
DF-e - Tool - OpenSmartRoute
Toolv0.1.0
DF-e
Brazilian SEFAZ e-invoices (NF-e, CT-e) issued against your company. A1 cert, DANFE PDF.