> ## Documentation Index
> Fetch the complete documentation index at: https://developers.argosidentity.com/llms.txt
> Use this file to discover all available pages before exploring further.

# FACE-LIVE-PSV

> Returns a 0–100 liveness score showing whether a single selfie was taken of a live person.

Send a single selfie, and FACE-LIVE-PSV returns a score from 0 to 100 for how likely it was taken of a live person rather than a photo, screen, or mask. It is passive: the user does not have to perform any action, such as turning their head.

* **It does not decide pass or fail.** You set the pass threshold using `livenessScore`.
* If no face is found, the call returns `502 FACE_NOT_DETECTED` and is not billed.

## Billing

The billing unit is `response`, and each call has a `count` of 1.

| KOR | USA |
| :-: | :-: |
| 0.08 | 0.12 |

## Specification

> [card] [FACE-LIVE-PSV specification](https://client-api.argosidentity.com/docs#en/tag/unit-api/POST/v1/units/face-live-psv)
>
> Check the endpoint, request and response fields with examples, and errors.

For errors that apply to all APIs, see [Error Codes](https://developers.argosidentity.com/en/idcheck/unit-api/errors.md).


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