ISO 20022

ISO 20022 is an international standard for financial messaging that provides a shared data dictionary and a consistent set of message definitions, expressed in XML and increasingly JSON. Rather than defining a single message, it defines a common modeling methodology and business vocabulary so that payments, securities, trade, cards, and cash-management systems can exchange richly structured, unambiguous data.

• Common data dictionary - A single, reusable set of business components and elements that every message type draws from for consistency.
• Structured message definitions - Machine-readable XML/JSON schemas for concrete flows like credit transfers, direct debits, and reporting.
• Rich, granular data - Far more structured remittance and party information than legacy formats, improving reconciliation and reducing manual repair.
• Global governance - Maintained through a registration authority and industry submission process that keeps the catalogue current and interoperable.

For financial APIs, ISO 20022 is the payload standard behind the modern rails — SWIFT’s cross-border migration, real-time payment systems, and open-banking schemes increasingly model their messages on it. As banks expose these flows through APIs and, now, through agent-facing interfaces, ISO 20022 provides the structured, well-governed vocabulary that lets payment instructions and reporting move between institutions without lossy translation.