---
title: "Simulate an out-of-band (OOB) authentication request."
method: POST
path: "/issuing/simulate/oob/authentication"
tags: ["Out-of-band authentication simulator"]
---

# Simulate an out-of-band (OOB) authentication request.

`POST /issuing/simulate/oob/authentication`

## Request

- Base URL: `https://{prefix}.api.sandbox.checkout.com`
- URL: `https://{prefix}.api.sandbox.checkout.com/issuing/simulate/oob/authentication`
- Auth: OAuth 2
  - Client credentials
  - Token URL: `string` scopes: `issuing:card-management-read`
- TypeScript: <https://skmtc.dev/checkout/apis/checkout-com-api-reference/docs/issuing/simulate/oob/authentication/post.ts> (a function with typed inputs; its response is checked against the schema)

Simulate a request to your back-end from an out-of-band (OOB) authentication provider.

## Request body

- SimulateOobAuthenticationRequest
  - `card_id` string, required: The card's unique identifier.
  - `transaction_details` OobSimulateTransactionDetails: Details for the simulated transaction.
    - `last_four` string: The last four digits of the card number, also known as the PAN.
    - `merchant_name` string: The merchant's name.
    - `purchase_amount` number: The amount of the simulated transaction.
    - `purchase_currency` string, ISO4217: The issuing currency, as a three-letter <a href="https://docs.checkout.com/docs/currency-codes" target="blank">ISO currency code</a>.

## Response `204`

No content

## Other responses

- `401`: Unauthorized
- `404`: Card not found
- `422`: Invalid data was sent
- `500`: Internal Server Error

---

[API](https://skmtc.dev/checkout/apis/checkout-com-api-reference.md) - [All operations](https://skmtc.dev/checkout/apis/checkout-com-api-reference/llms.txt) - [OpenAPI document](https://skmtc.dev/checkout/apis/checkout-com-api-reference/revisions/0f1abdb1c3e9?raw)