Pick a version. Each version documents the API contract as of a specific date. The latest version is always safe to start from; older versions are kept for plugins that integrated before a contract change.
Vault-first subscriptions: setup-token (no-charge) vaulting for PayPal + card/PayPal trials and non-trial PayPal; capture-first kept for Venmo/Apple Pay. Vault charges use usage: SUBSEQUENT; retired total_cycles/cycles_left.
Initial public release. Onboarding flow + Bearer auth + the mock-swap contract. Immutable - kept for plugins integrated before vault-first.
Auto-redirecting to the latest version in 2 seconds. Or pick one above to stay here.