# Verify a customer's card with a zero-value authorization.

Verify a customer's card with a zero-value authorization.

1. Verify the customer's card details with a zero-value authorization. Primary path shown is a keyed plain-text card (card.type = card, entryMethod = keyed). Requires an Idempotency-Key header. Do not treat a 200 as success on its own: check the response verified flag (and transactionResult.status) - a valid request can still return verified = false when the card is rejected.
 [verifyCard](/api/verify-card)

## Workflow diagram

```mermaid
flowchart TD
  step0["1. card verification request · API"]
```