Create a card top-up link
Purchase credits by dollar amount. amountCents is the dollar amount in cents (e.g. 500 = $5).
Default (no savedCardId): returns a checkout URL from the selected payment provider for hosted checkout.
When savedCardId is set: the referenced vaulted card is charged off-session on the same provider (no redirect) and checkoutUrl is empty on success. checkoutUrl is only populated when the provider requires an interactive step (e.g. a 3DS/SCA re-authentication) to complete the charge. savedCardId and saveCard=true are mutually exclusive. Requires workspace role owner or admin.
Authorizations
OAuth 2.1 authorization-code flow with PKCE.
Headers
Workspace this request operates in — the workspace id (wksp_…) or the organization id, from GET /workspaces. Required with an API key, which carries no workspace (400 WORKSPACE_REQUIRED without it). With an OAuth token it defaults to the workspace the token was issued for. Responds 403 WORKSPACE_FORBIDDEN when the caller is not a current member, rather than falling back to another workspace.
Optional client-generated key. A repeated request with the same key, method and path (by the same caller in the same workspace) replays the original response, with Idempotency-Replayed: true, for 24 hours instead of running again — safe retries. The same key with a different body is refused with 422 IDEMPOTENCY_KEY_REUSED (nothing runs): use a new key for each new request. A 5xx answer is not remembered (a retry runs).