Idempotency-Key ensures that repeated requests (e.g. due to network errors) for card deposit or withdrawal are processed only once, preventing duplicate transactions.
How to use
Include the header in your API request: Copy- The key must be unique for each new operation (within the account).
- To retry the same operation, reuse the same key.
Recommendations
- Use UUIDs or another reliable unique key generator.
- The lifetime of an Idempotency-Key is not strictly defined, but guaranteed for at least one month.
- Reusing the same key for different requests will result in an error.

