Create card deposit session
Auth context: sub-user — On-Behalf-Of required. Rate limit: 50/min.
Returns a whitelabelUrl to redirect the sub-user to. After payment,
the on-ramp partner posts a callback and the sub-user’s wallet is
credited; subscribe to deposit.completed WS events to react.
Authorizations
Your raw API key. Generate, rotate, and revoke keys from the merchant
dashboard. Keys can optionally be bound to one or more allowed source
IPs — requests from any other IP are rejected with API_KEY_IP_DENIED.
Headers
Sub-user UUID or the merchant's externalId for that sub-user.
Required for sub-user-context routes; rejected (via requireMerchant)
on merchant-context routes.
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