generated: '2026-07-22' method: searched source: https://weboneapi.activfinancial.com/playground/ notes: >- The Web One API ships a public in-browser playground (a live code editor seeded from every tutorial snippet, e.g. /playground/connect-disconnect) wired to the replay gateway host documented in the tutorials. Tutorial code uses the placeholder credentials __ACTIV_SESSION_USER_ID__ / __ACTIV_SESSION_PASSWORD__ which the hosted playground substitutes at runtime; the docs note "You may have to update the userId and password fields". No standalone test credentials are published - live entitled credentials come from sales. Recorded verbatim; nothing invented. playground: url: https://weboneapi.activfinancial.com/playground/ type: in-browser code playground (WebAssembly client, live editor) example: https://weboneapi.activfinancial.com/playground/connect-disconnect test_environment: host: aop-ny4-replay.activfinancial.com transport: wss note: Replay gateway host used throughout the public tutorials. test_credentials: published: false placeholders: [__ACTIV_SESSION_USER_ID__, __ACTIV_SESSION_PASSWORD__] note: Substituted by the hosted playground; live credentials are sales-provisioned and entitlement-managed. fixtures: examples_repo: https://github.com/activfinancial/one-api-examples hosted_examples: https://weboneapi.activfinancial.com/examples