> For the complete documentation index, see [llms.txt](https://docs.flashback.tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flashback.tech/support-reference/platform-api-reference/mfa-multi-factor-authentication/post__passkey_auth-options.md).

# post\_\_passkey\_auth-options

#### Code Samples

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

```shell
# You can also use wget
curl -X POST https://backend.flashback.tech/mfa/passkey/auth-options \
  -H 'Accept: application/json' \
  -H 'Authorization: Bearer {access-token}'
```

{% endtab %}

{% tab title="HTTP" %}

```http
POST https://backend.flashback.tech/mfa/passkey/auth-options HTTP/1.1
Host: localhost:3000
Accept: application/json
Authorization: Bearer {access-token}
```

{% endtab %}

{% tab title="JavaScript" %}

```javascript
const headers = {
  'Accept':'application/json',
  'Authorization':'Bearer {access-token}'
};

fetch('https://backend.flashback.tech/mfa/passkey/auth-options',
{
  method: 'POST',
  headers: headers
})
.then(function(res) {
    return res.json();
}).then(function(body) {
    console.log(body);
});
```

{% endtab %}

{% tab title="Ruby" %}

```ruby
require 'rest-client'
require 'json'

headers = {
  'Accept' => 'application/json',
  'Authorization' => 'Bearer {access-token}'
}

result = RestClient.post 'https://backend.flashback.tech/mfa/passkey/auth-options',
  params: {
  }, headers: headers

p JSON.parse(result)
```

{% endtab %}

{% tab title="Python" %}

```python
import requests
headers = {
  'Accept': 'application/json',
  'Authorization': 'Bearer {access-token}'
}

r = requests.post('https://backend.flashback.tech/mfa/passkey/auth-options', headers = headers)

print(r.json())
```

{% endtab %}

{% tab title="PHP" %}

```php
<?php

require 'vendor/autoload.php';

$headers = array(
    'Accept' => 'application/json',
    'Authorization' => 'Bearer {access-token}',
);

$client = new \GuzzleHttp\Client();

try {
    $response = $client->request('POST','https://backend.flashback.tech/mfa/passkey/auth-options', array(
        'headers' => $headers,
       )
    );
    print_r($response->getBody()->getContents());
 }
 catch (\GuzzleHttp\Exception\BadResponseException $e) {
    // handle exception or api errors.
    print_r($e->getMessage());
 }

 // ...
```

{% endtab %}

{% tab title="Java" %}

```java
URL obj = new URL("https://backend.flashback.tech/mfa/passkey/auth-options");
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Accept", "application/json");
con.setRequestProperty("Authorization", "Bearer {access-token}");
int responseCode = con.getResponseCode();
BufferedReader in = new BufferedReader(
    new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
    response.append(inputLine);
}
in.close();
System.out.println(response.toString());
```

{% endtab %}

{% tab title="Go" %}

```go
package main

import (
       "bytes"
       "net/http"
)

func main() {

    headers := map[string][]string{
        "Accept": []string{"application/json"},
        "Authorization": []string{"Bearer {access-token}"},
    }

    data := bytes.NewBuffer([]byte{})
    req, err := http.NewRequest("POST", "https://backend.flashback.tech/mfa/passkey/auth-options", data)
    req.Header = headers

    client := &http.Client{}
    resp, err := client.Do(req)
    // ...
}
```

{% endtab %}
{% endtabs %}

`POST /mfa/passkey/auth-options`

*Generate Passkey Authentication Options*

Generate authentication options for WebAuthn passkey verification. This endpoint creates the challenge and configuration needed for passkey authentication.

> Example responses

> 200 Response

```json
{
  "success": true,
  "data": {
    "challenge": "dGVzdCBjaGFsbGVuZ2U=",
    "rpId": "flashback.tech",
    "userVerification": "required",
    "timeout": 60000
  }
}
```

> 500 Response

```json
{
  "success": false,
  "error": "Failed to generate authentication options"
}
```

#### Responses <a href="#post__passkey_auth-options-responses" id="post__passkey_auth-options-responses"></a>

| Status | Meaning                                                                    | Description                                   | Schema |
| ------ | -------------------------------------------------------------------------- | --------------------------------------------- | ------ |
| 200    | [OK](https://tools.ietf.org/html/rfc7231#section-6.3.1)                    | Authentication options generated successfully | Inline |
| 500    | [Internal Server Error](https://tools.ietf.org/html/rfc7231#section-6.6.1) | Internal server error                         | Inline |

#### Response Schema <a href="#post__passkey_auth-options-responseschema" id="post__passkey_auth-options-responseschema"></a>

Status Code **200**

| Name                | Type    | Required | Restrictions | Description                              |
| ------------------- | ------- | -------- | ------------ | ---------------------------------------- |
| » success           | boolean | false    | none         | Indicates if the request was successful  |
| » data              | object  | false    | none         | Passkey authentication challenge options |
| »» challenge        | string  | false    | none         | Base64-encoded challenge for WebAuthn    |
| »» rpId             | string  | false    | none         | Relying party identifier                 |
| »» userVerification | string  | false    | none         | User verification requirement            |
| »» timeout          | integer | false    | none         | Challenge timeout in milliseconds        |

Status Code **500**

| Name      | Type    | Required | Restrictions | Description                             |
| --------- | ------- | -------- | ------------ | --------------------------------------- |
| » success | boolean | false    | none         | Indicates if the request was successful |
| » error   | string  | false    | none         | Error message describing the issue      |

**Enumerated Values**

| Parameter          | Value       | Description                                     |
| ------------------ | ----------- | ----------------------------------------------- |
| » userVerification | required    | User verification is required                   |
| » userVerification | preferred   | User verification is preferred but not required |
| » userVerification | discouraged | User verification is discouraged                |


---

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