payment-testing

Local-first billing and payment virtualization layer — emulate payment providers offline: checkout flows, subscriptions, and webhooks.

Payment cryptography workflow library. EMV, DUKPT, PIN blocks, MAC, card validation, TR-31/TR-34, and HSM command inspection. Inspectable recipes for development, testing, and interoperability.

This fork extends CyberChef with a focused set of payment cryptography operations intended for engineering, debugging, and interoperability work in regulated payment environments.

Risk-based API and webhook QA lab with Playwright, TypeScript, idempotency, payment state testing and API-to-ledger reconciliation.

A PayPal payment reliability lab for testing checkout failures, state reconciliation, idempotency, and webhook handling.

Universal test suite for MCP servers — dual-rail payment testing (x402 + MPP/Tempo), 402 challenge validation, security audit, load testing. Works with any MCP-compatible server.

NumGen - A card number generator with Luhn validation. Generates test numbers for educational and testing purposes only. Supports multiple languages.

A research-backed B2B payments capstone testing financial correctness under delayed, duplicated, out-of-order, and conflicting payout events.

QA case study covering SaaS workflow testing, UTM/link management, QR codes, analytics/GA4, geo and device targeting, payment, email/SMTP, end-to-end and regression testing.

Luhn-valid Visa test card number generator with CLI and JSONL output (learning/testing only — not bound to any real account)

Reliability CI for stablecoin payment integrations. Inject deterministic payment failures and verify financial state correctness.

Self-built mock payment API (Node.js/Express) with full-stack test automation — UI testing via Playwright, API testing via RestAssured, covering success/decline/insufficient-funds payment flows.

Payment gateway API test automation against Stripe's test-mode sandbox — REST Assured + Postman/Newman

AI-assisted QA lab for fintech payment systems: risk analysis, test generation, API checks, and quality reports. Public

Synthetic payment-testing platform with deterministic failures, durable async webhooks, chaos scenarios, SDKs, and observability.

Reproducible x402 V2 payment-policy examples: five synthetic fixtures, Node.js runner and GitHub Actions CI. No wallets or payments.

x402 V2 HTTP conformance and payment-policy checks, offline signature verification, CLI/CI evidence and MCP tools. No payments or on-chain settlement verification.

Um gerador de IBANs portugueses válidos (em formato) para testes de software, desenvolvimento e demonstrações.