Try it against sandbox. Every request from this page targets https://sandbox.bankconnector.com by default. The demo bank channel never moves real money by construction and responds in ~4 seconds; a real bank connection is only money-safe if your company there is provisioned sandboxOnly — see Going Live. Stateless discovery/convert/validate routes are prefilled with a public, read-only sandbox key so you can run them with zero setup. Anything tenant-scoped (payments, connections, approvals) needs your own sandbox API key — never paste a production key into this page.