---
title: "Create a new Activity Custom Field"
method: POST
path: "/custom_field/activity/"
tags: ["custom_fields.activity"]
---

# Create a new Activity Custom Field

`POST /custom_field/activity/`

Activity Custom Fields belong to Custom Activities, and have additional attributes:

- `custom_activity_type_id` – the ID of the Custom Activity Type this Field
  should belong to.
- `required` – whether the Field will be required to publish the activity.

## Response `200`

Successful response

## Other responses

- `400` — Bad request
- `401` — Unauthorized
- `404` — Not found

---

[API](https://skmtc.net/close/apis/close-api.md) · [All operations](https://skmtc.net/close/apis/close-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/close/close-api/revisions/0dcf3303e9d7/schema)