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.
SEFAZ SC: NFE - Tool - OpenSmartRoute
Toolv0.1.0
SEFAZ SC: NFE
SEFAZ SC: NFE, official-source lookup. Platform-hosted, pay per query with prepaid credit.