---
title: "/fields/:id"
method: PUT
path: "/fields/{id}"
---

# /fields/:id

`PUT /fields/{id}`

## Request

- Base URL: `https://api.mailerlite.com/api/v2`
- URL: `https://api.mailerlite.com/api/v2/fields/{id}`
- Auth: API key in header `X-MailerLite-ApiKey`

Update custom field in account

## Path parameters

- `id` integer, required

## Request body

- object
  - `title` string: Title of field

## Response `200`

200

- object
  - `id` integer
  - `title` string
  - `key` string
  - `type` string
  - `date_updated` string
  - `date_created` string

## Other responses

- `400`: 400
- `404`: 404

## Changes

- **2026-11-03** `6f921caf37b1`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/mailerlite/apis/v2-production/changes/fields/:id/put.md)

---

[API](https://skmtc.dev/mailerlite/apis/v2-production.md) - [All operations](https://skmtc.dev/mailerlite/apis/v2-production/llms.txt) - [OpenAPI document](https://skmtc.dev/mailerlite/apis/v2-production/revisions/6f921caf37b1?raw)