real-time-payments

ISO20022 messages in Go for Real Time Payments (RTP)

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Superstream is a Solana-based real-time streaming payments protocol

Increase is a bank-grade payments and financial infrastructure platform that exposes a single REST API for moving and holding money in the United States - ACH transfers, real-time payments (RTP and FedNow), domestic and international wires, physical and mailed checks, deposit accounts and account numbers, card issuing and card acquiring, ledgering…

Open-source assessment framework and reference implementation for fraud prevention and operational resilience in irrevocable instant-payment systems. Deterministic, explainable, auditable decisioning with a strict in-path latency budget.

Pre-send fraud triage console for Interac e-Transfer and Real-Time Rail payments: explainable risk scoring, analyst brief, human hold/release gate, audit log

Paymentus — independent third-party profile of a public API surface, by API Evangelist. Paymentus (NYSE: PAY) is a Addison, Texas-based cloud billing and payment technology company founded in 2004 that operates one of the largest electronic bill presentment and payment (EBPP) networks in North America.

📺 Stream and monetize live content effortlessly with QR payments and contextual ads, enhancing engagement for creators and viewers alike.

Aciworldwide — ACI Worldwide is a global real-time payments software company (NASDAQ: ACIW) whose Open Payment Platform — the PAY.ON / OPPWA gateway — exposes a single unified RESTful API for accepting and managing electronic payments worldwide.

DuitNow-style real-time interbank payment switch: Spring Boot routes ISO 20022 transfers (pacs.008/002, camt.056/029) between Go bank simulators, with proxy lookup, net debit caps, timeout reversals, end-of-day settlement and a live dashboard.

Volt — independent third-party profile of a public API surface, by API Evangelist. Volt is a London-headquartered real-time payments company that operates a global account-to-account (A2A) "pay by bank" network built on open banking rails. Founded in 2019, Volt connects merchants to bank-initiated payments across the UK (Faster Payments / Open Bank

Service virtualization is a software engineering technique that simulates how certain application components behave

Form3 — independent third-party profile of a public API surface, by API Evangelist. Form3 is a United Kingdom-headquartered, cloud-native payments technology company offering account-to-account payment processing as a single, unified REST API to banks and fintechs. Founded in 2016 and headquartered in London, Form3 runs a fully managed, Payments-as

Real-time payments clearing & settlement rail - ISO 20022-style messages over Kafka, exactly-once RTGS settlement on a double-entry PostgreSQL ledger, audit-replay reconciliation, and a natural-language AI ops copilot. Java · Python · Kafka · PostgreSQL · MongoDB

Zepto — independent third-party profile of a public API surface, by API Evangelist. Zepto is a Gold Coast, Australia based account-to-account (A2A) payments company that gives merchants and platforms programmable, real-time access to Australia's core money-movement rails.

Cuscal — independent third-party profile of a public API surface, by API Evangelist. Cuscal Limited is Australia's largest independent provider of payments and regulated data services outside the Big Four banks, founded in 1966 and listed on the ASX (ticker CCL). An Authorised Deposit-taking Institution regulated by APRA and ASIC, Cuscal supplies t

Enterprise-grade real-time payment settlement system (RTPS) built using event-driven microservices architecture with Kafka, transactional outbox, ACID consistency, and resilient failure recovery.

Nivelo — independent third-party profile of a public API surface, by API Evangelist. Nivelo is a New York City fintech that operates a payments risk and money-movement platform for the payroll industry, serving payment service providers (PSPs) and professional employer organizations (PEOs).

Zai — independent third-party profile of a public API surface, by API Evangelist. Zai (hellozai.com, formerly Assembly Payments / Assembly) is an Australian payments and Payments-as-a-Service provider headquartered in Melbourne. Zai gives platforms, marketplaces and vertical software companies a programmable way to onboard users, hold funds in mana

Runnable,reference implementation of payment-side execution finality for agentic, API, and automated payments. Implements Candidate Act, evidence-before-authority, and consume-once Settlement Sink verification against live instructions. Companion repo to IETF Internet-Draft draft-das-payment-execution-finality-01. Python 3.10+, 52 tests.