MODO API integration services (Argentina OpenFinance)

Deliverables checklist

• OpenAPI 3.1 specification covering authentication, balances, statements, transfers, MODO+ catalog, and webhooks
• Protocol report: app authorization chain, device-binding, token refresh and per-bank challenge handling
• Runnable Python and Node.js source for login, statement query, and transfer-status polling
• Integration test suite with sandbox fixtures and a Postman collection
• Compliance notes: BCRA interoperable wallet rules, Argentina Law 25.326 (PDPA), and Decree 353/2025 alignment

Engagement models

• Source code delivery from $300 — runnable code plus full docs handed over; payment after delivery upon satisfaction.
• Pay-per-call hosted API — point your stack at our endpoints and pay only for calls actually made; ideal for ramp-up and seasonal load.
• Optional dedicated maintenance retainer when MODO upgrades its app or when a partner bank changes its auth flow.

1. Multi-bank treasury for SMEs

An Argentine SME holding accounts in Galicia, Macro, and Credicoop installs our connector. Every 15 minutes the connector calls the balance API and writes a normalized record to the company ERP. The same pipeline pulls QR receipts so the controller can match them to invoices without opening three different home-banking sites. Maps to OpenFinance "account information" use case.

2. Reconciliation for QR-accepting merchants

An 800-store retailer that accepts MODO QR receives a webhook on every confirmed payment. The webhook payload includes the originating bank, the promo applied, and the settlement timestamp. Our adapter posts each event into the retailer's POS system so the cashier sees real-time confirmation and finance reconciles by close-of-day. Maps to OpenFinance "payment initiation + confirmation" with merchant-side ingestion.

3. PFM and budgeting export

A budgeting app lets users link MODO and pulls 24 months of categorized statements (QR, transfers, MODO+ purchases) for spend analysis. Categorization uses MCC plus MODO's promo metadata to label transit, mobile top-ups, and entertainment automatically. Maps to OpenData personal finance access under Argentina's Decree 353/2025 framework.

4. Cross-border accounting sync

A Latam-focused accounting SaaS exports MODO transactions for Argentine clients into a unified ledger that already covers Brazilian Pix and Mexican CoDi. Our integration tags each row with its source rail (MODO QR, MODO transfer, debit-card QR USD) so multi-currency reports stay auditable. Maps to OpenBanking-style aggregation across regional rails.

5. Fraud and risk monitoring

A risk team subscribes to transfer events and runs velocity rules across MODO and other linked wallets. Suspicious patterns — multiple small contact transfers, unusual MODO+ gift-card purchases — generate alerts in their SIEM. Maps to regulated-entity monitoring under BCRA digital-payment guidance.

Authentication and device binding

POST /api/v1/modo/auth/login
Content-Type: application/json

{
  "phone": "+5491155551234",
  "device_fingerprint": "<sha256-of-device-id>",
  "client_id": "ofl-modo-connector"
}

# 200 OK
{
  "challenge_id": "ch_8f2a...",
  "challenge_type": "sms_otp",
  "expires_in": 300
}

Statement query (per bank, normalized)

POST /api/v1/modo/statement
Authorization: Bearer <ACCESS_TOKEN>
Content-Type: application/json

{
  "account_id": "modo:gx:0023-89",
  "bank_code": "GAL",
  "from_date": "2026-04-01",
  "to_date":   "2026-04-30",
  "types": ["QR_PAYMENT","TRANSFER","MODO_PLUS"],
  "page": 1, "page_size": 100
}

# 200 OK
{
  "items": [
    {
      "id": "mv_01HZ...",
      "ts": "2026-04-12T18:42:11-03:00",
      "type": "QR_PAYMENT",
      "amount": "-4350.00",
      "currency": "ARS",
      "merchant": "Coto",
      "mcc": "5411",
      "promo_id": "GAL_VISA_15OFF",
      "bank_ref": "GAL-887421"
    }
  ],
  "next_page": null
}

Webhook: merchant payment confirmed

POST https://your-host/webhooks/modo
X-Modo-Signature: t=1714498800,v1=<hmac_sha256>
Content-Type: application/json

{
  "event": "payment.confirmed",
  "occurred_at": "2026-04-30T20:10:00-03:00",
  "merchant_id": "mc_7781",
  "payment_id": "py_01HZAB",
  "amount": "12990.00",
  "currency": "ARS",
  "method": "qr_credit",
  "card_brand": "visa",
  "issuing_bank": "BBVA",
  "promo_applied": null
}

# Recommended: verify HMAC, then 200 OK within 5s
# Retry policy: 4 retries, exponential backoff up to 30 min

Argentine regulatory context

MODO operates inside the BCRA (Banco Central de la República Argentina) interoperable e-wallet framework. Since April 2024, every interoperable wallet must accept QR payments from any other; from April 2025 the rule extends to debit-card QR in pesos and US dollars. We follow the official BCRA interoperable e-wallets guidance for QR routing, and align consent records with Decree 353/2025, which created Argentina's Open Finance System (regulation pending at BCRA).

Data protection

We work only under documented user authorization or authorized public APIs. PII is minimized at ingestion, tokens are rotated, and audit logs retain consent IDs. Our default model satisfies Argentina's Personal Data Protection Law 25.326, the BCRA's Comunicación "A" series on payment data, and is compatible with cross-border GDPR scopes for clients operating in the EU. NDAs and data-residency options are available for sensitive deployments.

OpenFinance Lab

We are an independent technical studio focused on App protocol analysis and authorized API integration. Our team's hands-on background spans mobile engineering, payment networks (UPI, Pix, BCRA QR), and bank-side data platforms. For Argentine fintech, we have shipped connectors for both bank-consortium wallets and standalone fintechs, and we keep current with BCRA's interoperability rules and the still-forming Open Finance System under Decree 353/2025.

• Coverage across LATAM payment rails: MODO QR, transfers 3.0, Pix, CoDi
• Custom Python / Node.js / Go SDKs and adapters with full test harnesses
• End-to-end pipeline: protocol analysis → build → validation → compliance review
• Source code delivery from $300 — receive runnable API source code and full documentation; pay after delivery upon satisfaction
• Pay-per-call hosted API — no upfront cost; ideal for usage-based budgets

Contact

For quotes, sandbox access, or to submit your target app and requirements, open our contact page:

Contact page

Typical response time within one business day. We sign NDAs before sharing reference implementations.

Engagement workflow

1. Scope confirmation: which MODO data flows you need (auth, balances, statements, webhooks).
2. Protocol analysis & API design — 2–5 business days.
3. Build and internal validation — 3–8 business days, including replay tests against fixtures.
4. Documentation, samples, Postman collection — 1–2 business days.
5. Typical first delivery: 5–15 business days; bank-side approvals can extend timelines.

FAQ

What do you need from me to start a MODO integration?

How long does delivery take for a MODO API drop?

How do you handle compliance with BCRA and Argentine privacy law?

Can the integration cover all 35+ partner banks of MODO?