Boulevard Tokenization API
A narrow, non-GraphQL REST endpoint (`POST https://vault.blvd.co/cards/tokenize`, confirmed in the public `promotion-demo` reference client's source) used to exchange raw card details for a reusable payment token client-side, before that token is attached to a cart via the Client API's `AddCartCardPaymentMethod` mutation. Keeps merchant integrations out of PCI DSS scope by ensuring card numbers never transit the integrator's own servers.