# Idempotency

All critical POST endpoints are secured with Idempotency keys to allow users to make identical requests multiple times with no side effects. 

Idempotency keys are input by the users in the `Idempotency-Key` header, We advise you use a uuid generator to create such keys.

Please find below an example of such request using an Idempotency key to secure the call:

```bash
curl --location 'https://staging.api.rialtobridge.xyz/api/client/v1/transactions' \
    -X POST \
    --header 'Idempotency-Key: fe5ebcc4-e0fc-4cf3-81dd-705a171effba' \
    --header 'Content-Type: application/json' \
    --header 'RIALTO_API_KEY: ab3bcq9ynhJ2Om85fLSlEfn3YXiolngd4m3n0rDm8Sg=' \
    --data '{
        "transactionType": "ONRAMP",
        "bankAccountId": "90ce9ee9-7d7f-48a2-ae47-b93e49b8aef2",
        "blockchainWalletId": "d9094448-a872-4a86-aa4f-b5953806d8c4",
        "blockchainAsset": "usdc",
        "transactionAmount": 10123.87
    }'
```