Live sandbox — Standard (v1) flow. Payment calls run on cc.firmly.work, everything else on api.firmly.work — the Explorer targets the right host per endpoint. Start with Bootstrap a browser session below. For a full runnable purchase, see the Standard Checkout Guide. The Agentic Pay group needs the separate Agentic Pay API token and network sandbox test cards — see Agentic Pay in the sandbox; iframe-based steps can't be completed here. Its order call, wallet-complete-order, is the one /api/v2 endpoint in this Explorer.