A Python package (on PYPI) to create or parse ISO20022 messages.

The FedNow ISO 20022 specifications

A comprehensive, high-performance, open-source Rust library for parsing, generating, validating, and transforming ISO 20022 (MX) financial messages.

FRB Services Status Checker

An open-source, high-performance payment message processing runtime built on top of the mx20022 message library. This is the transaction processing engine — the layer that turns a parsing library into a payment platform.

Open, machine-readable dataset of payment-rail capabilities (limits, cut-offs, settlement, identifiers) across UK/EU/US/CA, with typed accessors. Every fact is sourced and dated.

Cross River Bank — banking-as-a-service / sponsor bank

Open-source middleware connecting legacy core banking systems to U.S. instant payment rails — FedNow and RTP.