FiscalTech · Invoicing API

wLumen

Brazilian fiscal issuance without intermediaries.

A unified API for NF-e, NFS-e and NFC-e, with certificate handling, contingency flows and white-label delivery for software vendors.

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00 / Context

Where wLumen creates value.

A unified API for NF-e, NFS-e and NFC-e, with certificate handling, contingency flows and white-label delivery for software vendors.

Best fit

  • ISVs, ERPs, marketplaces and platforms that need Brazilian fiscal document issuance.
  • High-volume operations that need predictable fiscal infrastructure costs.
  • Engineering teams that want to reduce maintenance across municipal and SEFAZ integrations.

Outcomes

  • Less operational variance between NF-e, NFS-e and NFC-e workflows.
  • Planned fiscal contingency to reduce issuance outages in production.
  • White-label fiscal capability without exposing tax complexity to end customers.

Connects with

  • SEFAZ, ABRASF municipalities, A1 certificates and sandbox environments.
  • ERPs, billing platforms, marketplaces and invoicing systems.
  • Fiscal webhooks, REST APIs and secure storage for authorized XML files.
01 / Features

Everything you need.

Each feature was designed from a real production problem.

wLumen

Unified invoice models

NF-e, NFS-e and NFC-e under the same engine and SDK.

Certificate handling

Encrypted tenant vault for A1 certificates, with expiration alerts and safe rotation.

Automatic contingency

Fallback routes when tax authorities are unavailable.

White-label for ISVs

Your brand, your URL and your customer experience.

Predictable fixed cost

Volume-based plans instead of charging per issued invoice.

Compliance updates

Schemas and fiscal layouts updated as regulation changes.

02 / How it works

From zero to live in days.

An adoption process designed for teams that cannot waste time.

  1. 01

    Configure issuer data

    CNPJ, state registration, certificate and environment through the panel.

  2. 02

    Connect your application

    REST API and sandbox keys available from the start.

  3. 03

    Issue in production

    Asynchronous, idempotent transmission with authorized XML and document events through webhooks.

  4. 04

    Monitor with webhooks

    Statuses, cancellations and contingency events in real time.

03 / FAQ

Frequently asked questions.

Questions about wLumen? We answer the most common ones here.

Does wLumen support all Brazilian states?

The roadmap targets national NF-e coverage and the largest NFS-e municipalities.

How does white-label work?

You use the fiscal engine behind your brand, subdomain and customer experience.

What happens if the tax authority is down?

The system routes to contingency strategies or queues events for retry when service returns.

Let us start

Ready to put wLumen in orbit?

Talk to our team. We will respond within 1 business day with an initial proposal.