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Open Banking and YÖS: Service Provider License + API Security

TL;DR

YÖS lisansı (Yetkili Ödeme Servisleri) + Açık Bankacılık API güvenliği + KVKK uyumu paralel.

17 Şubat 2026 Financial Law 1 dk okuma 8 görüntülenme Son güncelleme: 10 Mayıs 2026

Open Banking is a great opportunity for fintech; However, if the license + security + KVKK triangle is not established from the beginning, the risk is great.

YÖS license

  • BRSA regulation + 6493 SK.
  • Minimum capital 5M TL.
  • Internal control + risk + compliance.

API security

  • OAuth 2.0 + OpenID Connect.
  • mTLS certificate.
  • Rate limit + anomaly detection.

Bank stakeholder agreements

  • SLA + uptime.
  • Data responsibility sharing.
  • Communication in case of breach.

Frequently asked

How should customer consent be obtained?

Explicit + specific + revocable; e-signature is recommended.

How long does the bank API last?

180 days is standard; It can be extended with an additional contract.

Who is responsible if there is a data breach?

Fintech in general; Shared if there is a violation via the bank API.

Relevant legislation

  • Law No. 6493 — Payment & electronic money; licensing, operating permit.
  • BRSA Regulations — Payment institution / EML permission, capital, reporting.
  • 5549 SKMASAK; KYC, STR, regular activity.
  • KVKK + GDPR — Data security, cross-border transfer.
  • PCI-DSS — Card storage; PCI level 1-4 compliance.
Legal notice: This article is for general information purposes; A meeting with a lawyer is required for a concrete case.

Kaynaklar ve referanslar

Kaynaklar

Açık Bankacılık ve YÖS: Hizmet Sağlayıcı Lisans + API Güvenlik içeriği hazırlanırken resmi mevzuat ve yüksek yargı kaynakları esas alınmıştır.

Telif bildirimi This content and all related Q&A texts are protected under Turkish Copyright Law No. 5846. Unauthorized copying, reproduction, publication, adaptation, bulk extraction, or commercial use is prohibited; legal and criminal remedies are reserved in case of infringement.

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