> For the complete documentation index, see [llms.txt](https://docs.vida.id/identity-stack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vida.id/identity-stack/authentication/authentication-factors/biometric-device-selfie-id/integration-methods/selfie-id-api/api/mock-data.md).

# Mock Data

## Face Match

Utilize the mock template image URL to simulate both successful and unsuccessful liveness and face match scenarios. The URL format includes 'lvs' for adjusting the liveness score and 'fms' for manipulating the face match score. Simply modify the values to achieve your desired testing outcomes.

URL: `https://mock-images.foobar.vida.id/mock-lv-fm?lvs=0.94&fms=0.90`

**Parameters**

* Lvs (Liveness Score): Any value `> 0.97` triggers a liveness error. 
* Fms (Face Match Score): Any value below `0.90` triggers a face match error.

**Configurable Thresholds**

* Liveness Score Threshold: Default value is `0.97`, and it can be customized.
* Face Match Score Threshold: Default value is `0.90`, and it can be customized.