---
title: "Batch update custom field values"
method: POST
path: "/v1/custom-fields/batch-update-contacts"
tags: ["custom-fields"]
---

# Batch update custom field values

`POST /v1/custom-fields/batch-update-contacts`

Set or update custom field values for multiple contacts in a single request. Useful for bulk-populating custom fields across your contact database.

## Request body

- object
  - `custom_fields` object[], required
    - `contact_id` string, uuid, required
    - `custom_field_id` string, uuid, required
    - `text_value` string
    - `date_value` string
    - `array_value` string[]

## Response `200`

Successful response

- object
  - `error` boolean, required
  - `data` object, required
    - `count` integer, required

## Other responses

- `400` — Request body failed validation.
- `401` — Missing or invalid API key.
- `403` — Valid key, insufficient permission.
- `404` — Resource does not exist.
- `429` — Rate limit exceeded.
- `500` — Unexpected server error.

---

[API](https://skmtc.net/getdex/apis/dex-public-api.md) · [All operations](https://skmtc.net/getdex/apis/dex-public-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/getdex/dex-public-api/versions/6f01cd52ac12/schema)