# Simulate that the Next Credential Scan Will Succeed

* [Request Parameters](https://docs.seam.co/latest/~/revisions/DFdrUdS2jQOnbJTNDT5a/api/acs/encoders/simulate/..#request-parameters)
* [Response](https://docs.seam.co/latest/~/revisions/DFdrUdS2jQOnbJTNDT5a/api/acs/encoders/simulate/..#response)
* [Examples](https://docs.seam.co/latest/~/revisions/DFdrUdS2jQOnbJTNDT5a/api/acs/encoders/simulate/..#examples)

Simulates that the next attempt to scan a [credential](https://docs.seam.co/latest/~/revisions/DFdrUdS2jQOnbJTNDT5a/capability-guides/access-systems/managing-credentials) using the specified [encoder](https://docs.seam.co/latest/~/revisions/DFdrUdS2jQOnbJTNDT5a/capability-guides/access-systems/working-with-card-encoders-and-scanners) will succeed. You can only perform this action within a [sandbox workspace](https://docs.seam.co/latest/~/revisions/DFdrUdS2jQOnbJTNDT5a/core-concepts/workspaces#sandbox-workspaces).

{% tabs %}
{% tab title="Signature" %}

```
POST /acs/encoders/simulate/next_credential_scan_will_succeed ⇒ void
```

{% endtab %}
{% endtabs %}

<details>

<summary>Authentication Methods</summary>

* API key
* Personal access token\
  Must also include the `seam-workspace` header in the request.

To learn more, see [Authentication](https://docs.seam.co/latest/api/authentication).

</details>

## Request Parameters

**`acs_encoder_id`** *String* (Required)

ID of the `acs_encoder` that will be used in the next request to scan the `acs_credential`.

***

**`acs_credential_id_on_seam`** *String*

ID of the Seam `acs_credential` that matches the `acs_credential` on the encoder in this simulation.

***

**`scenario`** *String*

Scenario to simulate.

***

## Response

void