OPEN RAMBO · VIRTUAL CARD ISSUING PLATFORM

Virtual Card API: Create, Top Up, Freeze and Track Cards

Build card workflows with explicit controls for creation, wallet-funded top-ups, freezing, unfreezing, closure, and transaction lookup.

Who this is for

Developers building card-management features into business software, finance operations, or customer-facing payment products.

Core capabilities

Supported USDT network funding and platform-wallet crediting
Database-configured card products, issuance fees, and minimum funding
Card top-up, freeze, unfreeze, close, and status controls
Separate platform-wallet and issuer-side card transaction records
Scoped issuing API access with idempotent mutations

Operating workflow

Create an account

Complete the required account and business information in the secure workspace.

Fund the platform wallet

Use only the supported network and current address shown in the account.

Select a card product

Review the fee, minimum funding, usage notes, and live status.

Issue and fund the card

Wallet deductions and card credits are recorded separately.

Use at a supported merchant

Start with a controlled amount and do not use repeated tests to evade review.

Reconcile transactions

Distinguish authorization, settlement, reversal, refund, and fee events.

Operational focus for this use case

virtual card lifecycle automation: Treat every mutation as a financial operation. Persist the request ID, idempotency key, response status, internal ledger entry, and upstream reference before showing the final state to a user.

Risk and acceptance boundaries

Merchant acceptance varies by merchant, geography, card network, issuing program, and real-time controls. OPEN RAMBO does not guarantee that any card will work in every payment scenario. Cards must not be used for illegal activity, cash-out, abusive refunds, review evasion, or repeated decline testing.

FAQ

Why is idempotency required?

It prevents a retry from creating a second card or duplicate card funding operation when the first response is delayed.

Should wallet and card transactions use one balance?

No. The platform wallet and each card account have different balances and transaction lifecycles, even when shown in one interface.