MEI Fácil (Neon) API Integration & Open Finance Solutions

Consolidated MEI services for Brazil: OpenData/OpenFinance protocol analysis, onboarding, DAS/DASN, certificates, and card management with compliant API delivery.

Starting at $300 • Compliance-driven
OpenData · OpenFinance · Protocol Analysis · Pix / Boleto

Securely connect MEI Fácil’s finances, billing & tax features to your backend

We provide end-to-end integration for MEI-oriented services via compliant interfaces: MEI/CNPJ onboarding, DAS payments, annual DASN reporting, certificates (CCMEI), and Cartão CNPJ management, with OpenData/Open Finance aligned APIs, SDKs and test cases.

One-stop MEI onboarding — Open MEI/CNPJ onboarding, DAS payments, annual DASN filing, certificate retrieval (CCMEI), and Cartão CNPJ management APIs.
Payments & collections integration — Pix callbacks, boleto invoicing and reconciliation, credit/debit card payments, automated bill reconciliation and status aggregation.
Accounting & reporting automation — automatic synchronization of transaction streams, DAS/IRS-compliant reports (CSV/Excel/PDF) and ERP integration mapping.
Security & compliance — LGPD/Open Banking/Open Finance aligned, minimal data access, audit logs and consent records.
Get a Quote View Deliverables

What we deliver (examples)

Standard Deliverables

  • OpenAPI / Swagger specs with interactive docs
  • Protocol and authorization flow analysis (device fingerprint, token lifecycle)
  • Runnable backend implementations (Node.js / Python), with authentication middleware and webhook management
  • Front-end / SDK samples (React / Android / iOS / Flutter optional)
  • Automated tests, acceptance criteria and deployment guide
  • Compliance guidance (data retention, audits, privacy)

Interface Example: DAS Payment (pseudo-code)

# POST /api/v1/neon/mei/das/pay
Content-Type: application/json
Authorization: Bearer <CLIENT_TOKEN>

{
  'cnpj': '12.345.678/0001-90',
  'period': '2025-09',
  'amount': 123.45,
  'payment_method': 'boleto'  // or 'pix'
}

# Response: { 'status': 'SUCCESS', 'payment_id': 'PAY_abc123', 'due_date':'2025-10-05' }

Onboarding Scenarios

- Automatically create a new MEI's CNPJ and obtain CCMEI; - Schedule and send DAS (Boleto or Pix) in bulk and aggregate payment receipts; - Sync transactions to accounting systems and generate annual DAS/DASN reports; - Provide Neon with access-controlled third-party accounting/ERP integration.

API Integration Quick Guide

  1. Provide target App name (MEI case already provided) and specific needs (e.g., DAS automation, Pix callbacks, annual report export).
  2. We perform protocol analysis and return feasibility and security assessment (2-5 business days).
  3. Sign NDA / compliance commitment if required, and provide test accounts or credentials (if available).
  4. Development delivery: API implementation, OpenAPI docs, SDK and automated tests (typically 5-15 business days, depending on complexity).
  5. Post-delivery support: 14 days of bug fixes and deployment assistance; longer-term maintenance available via monthly contract.

Compliance & Privacy

All work is based on client authorization or publicly available APIs; we provide data minimization recommendations, audit logs and consent records, and can sign an NDA if needed.

About Our Studio

We are a studio focused on mobile app protocol analysis and third-party API integration. Our team brings fintech, banking and cloud-native experience to deliver compliant, production-ready API and SDK solutions for global clients.

  • OpenAPI, SDKs, testing scripts and deployment guides
  • Multi-language support (English, Portuguese, Chinese, etc.)
  • NDA available and security/audit support
  • Transparent pricing: starting at $300, with pay-on-delivery options

Contact Us

Ready to start? Visit our contact page to submit the App name and requirements. We will respond within 24 hours with an initial proposal and quote.

Go to Contact Page

📦 Full App Description (collapsed) — MEI Fácil / Neon

MEI Fácil has been integrated into the Neon app, offering MEI/CNPJ onboarding, DAS management and payments, accounting services, annual DASN, MEI certificate (CCMEI), and Cartão CNPJ features, while leveraging Neon financial services (earnings as credit, Neon CD yields higher than savings, no-fee card, support for Pix and Boleto).

Additional Neon advantages include instant access to financial products and seamless integration with Neon services, enabling MEI solutions to scale efficiently.