Core Pix domains
DICT — Pix Key Directory
The DICT is the national registry of Pix keys. It maps simple identifiers (CPF/CNPJ, phone, email, random key) to transactional accounts. Users send and receive Pix without full bank details.Pix Transactions
This domain manages the execution lifecycle of an instant payment — authorization, validation, settlement, status updates, and traceability. Every transaction flows through regulated paths and must settle within seconds in the SPI infrastructure.QR Codes
Pix supports static and dynamic QR Codes for payment initiation. Static codes are reusable. Pix generates a dynamic code for each transaction. The dynamic code can carry the amount, metadata, and expiration.MED — Special Refund Mechanism
The Mecanismo Especial de Devolução governs fraud-related refund scenarios. It defines mandatory rules, timelines, and workflows for disputes, error handling, and fraud investigation across institutions.Additional Pix characteristics
Pix also follows system-wide principles for safety, inclusiveness, and nationwide compatibility.
Universal interoperability
Every participant in Pix communicates through shared standards — no closed networks, no proprietary protocols. Any participant can send and receive Pix with any other.Regulatory standardization
BACEN defines the rules, message formats, limits, fraud controls, and operational requirements. All participants must follow the same specifications.Open participation model
Pix supports many types of institution:- Banks
- Payment institutions
- Fintechs
- Digital wallets
- Cooperatives
- Government entities
Security posture
Pix enforces a strict security framework with:- Strong encryption
- Standardized authentication and authorization
- Mandatory fraud-prevention processes
- Full auditability and traceability of every event