---
title: "Read a Custom Field"
method: GET
path: "/custom_fields/{custom_field_id}"
tags: ["Custom Fields"]
---

# Read a Custom Field

`GET /custom_fields/{custom_field_id}`

Get Custom Field definition by ID

## Path parameters

- `custom_field_id` integer, required

## Response `200`

Successfully retrieved Custom Field

- object

## Other responses

- `401` — Invalid credentials
- `403` — You do not have permission to access specified Custom Field.
- `404` — Custom Field not found
- `default` — Unexpected error

---

[API](https://skmtc.dev/optimizely/apis/optimizely-api.md) · [All operations](https://skmtc.dev/optimizely/apis/optimizely-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/optimizely/optimizely-api/revisions/5151fe6a2297/schema)