---
title: "Show custom field with provided ID"
method: GET
path: "/api/v2/custom_fields/{id}"
tags: ["Custom Fields"]
---

# Show custom field with provided ID

`GET /api/v2/custom_fields/{id}`

## Request

- Base URL: `https://yournation.nationbuilder.com`
- URL: `https://yournation.nationbuilder.com/api/v2/custom_fields/{id}`
- Auth: HTTP bearer

Returns the custom field that matches the given ID.

## Response `200`

The requested custom field.

- CustomFieldShowResponse: The JSON:API top-level document shape for responses returning a single resource under the data member.
  - `data` object, required: A JSON:API resource identifier object, the type/id pair that uniquely identifies a single resource.
    - `id` string, required: Unique identifier of the resource.
    - `type` 'custom_fields', required: The JSON:API resource type.
    - `attributes` CustomFieldReadOnlyAttributes: The read-only attributes of a custom_field.
      - `created_at` string, date-time
      - `field_type` string, nullable: The field type.
      - `name` string, nullable: The name of the field.
      - `options` object, nullable: Multiple choice options.
      - `position` integer, nullable: The position in order of custom fields on the assigned model.
      - `resource_type` string, nullable: The resource the field belongs to. Can be 'Signup' or 'Donation'
      - `slug` string, nullable: A unique identifier for the field.
      - `updated_at` string, date-time
  - `included` Resource[]: Sideloaded resources requested via the include query parameter. Each entry is a full resource object whose shape is documented under its own resource type.
    - `id` string, required: Unique identifier of the resource.
    - `type` string, required: The JSON:API resource type.
    - `attributes` object: The attributes of the resource, as documented for its resource type.
    - `relationships` object: References from this resource to other resources in the document.
  - `meta` object: Non-standard information about the document. Empty unless the endpoint has metadata to convey.

## Other responses

- `401`: The access token is missing, expired, or not authorized to access this resource.
- `404`: No resource exists with the provided ID.
- `429`: The access token has exceeded its request quota for the current rate-limit window.

## Changes

- **2026-11-05** `d5c88ca497ac`: 2 breaking, 5 info
  - the response's body type changed from `object` to no type for status `200`
  - removed the required property `data` from the response with the `200` status
  - added `#/components/schemas/show_document, subschema #2` to the response body `allOf` list for the response status `200`
  - media type `application/json` was changed to a more specific media type `application/vnd.api+json` for the response status `200`
  - …3 more

[Operation history](https://skmtc.dev/nationbuilder/apis/nationbuilder-v2-api/changes/api/v2/custom_fields/:id/get.md)

---

[API](https://skmtc.dev/nationbuilder/apis/nationbuilder-v2-api.md) - [All operations](https://skmtc.dev/nationbuilder/apis/nationbuilder-v2-api/llms.txt) - [OpenAPI document](https://skmtc.dev/nationbuilder/apis/nationbuilder-v2-api/revisions/d5c88ca497ac?raw)