---
title: "PATCH /largefacelists/{largeFaceListId}/persistedfaces/{persistedFaceId}"
method: PATCH
path: "/largefacelists/{largeFaceListId}/persistedfaces/{persistedFaceId}"
---

# PATCH /largefacelists/{largeFaceListId}/persistedfaces/{persistedFaceId}

`PATCH /largefacelists/{largeFaceListId}/persistedfaces/{persistedFaceId}`

Update a persisted face's userData field.

## Path parameters

- `largeFaceListId` string, required
- `persistedFaceId` string, uuid, required

## Request body

- UpdateFaceRequest — Request to update face data.
  - `userData` string — User-provided data attached to the face. The size limit is 1KB.

## Response `200`

A successful call returns an empty response body.

## Other responses

- `default` — Error response.

---

[API](https://skmtc.net/azure/apis/face-client.md) · [All operations](https://skmtc.net/azure/apis/face-client/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/azure/face-client/versions/106051bfd7b7/schema)