Open source, composable payments platform | PCI compliant | SaaS and Self-host options | Enables connectivity to multiple payment, payout, fraud, vault and tokenization providers | Uplifts authorization with intelligent routing and revenue recovery | Reduce payment processing costs with cost observability | Reduces payment ops with reconciliation

Polar — A billing platform for the intelligence era

On-chain crypto payment platform for individuals and businesses.

The Linux Kernel Of Payments Infrastructures ; Enterprise Payments Aggregator for immutable reliability and forensic auditability. Rooted in Linux principles Of Community . No vendor lock-in—governance, code, and ledger all verifiable. Implements: idempotency, distributed retries, circuit-breaker

The service facilitates payment tracking within the TON blockchain, offering a user-friendly API for generating invoices in multiple currencies (TON, Jettons).

Practical examples of our Embed button, API and Webhooks!

Bringing Web2's subscription simplicity to Web3. Tributary enables any Solana-based business to offer truly automated recurring payments

«Твои платежи»: Интеграция на PHP

Ruby library for the Zai Payment API.

Mega framework focused on providing rapid, well-structured and also free open banking and fintech service

🏎️ The fastest checkout experience in Web3 ⚡

Decentralized P2P micropayment channels for autonomous AI agents

Soul streams is a payment streaming service on the Solana blockchain

This is demo project with full payment gateway integration in Flutter. I have Properly handle the user cancel payment operations and payment successfull operations.

Lunoss Pay is a full-stack payment gateway on Solana — a single API that takes you from payment creation to on-chain confirmation to webhook delivery, without touching an RPC node. Built for product teams who want to ship crypto payments, not become blockchain engineers.

«Твои платежи»: Интеграция на Go

«Твои платежи»: Интеграция на Python

B2B embedded payment platform built with Spring Boot. Provides merchant registration, API credential generation, transaction management, standardized error handling, and 2FA capabilities, backed by MySQL and Docker. Developed as a multidisciplinary project focused on software architecture, quality, security, databases, and web engineering.

An unofficial Go SDK for the GSPAY2 Payment Gateway API. This SDK provides a comprehensive, idiomatic Go interface for payment processing, payouts, and balance queries.

A real-time incident monitoring system for the Safaricom Daraja M-Pesa API. Probes all major Daraja endpoints on a schedule, aggregates results through a Kafka event pipeline, automatically opens and resolves incidents, and fans out notifications to subscribers across multiple channels.