---
title: "Update a custom object instance"
method: PUT
path: "/api/v1/custom-objects/by-id/{id}"
tags: ["customObjects"]
---

# Update a custom object instance

`PUT /api/v1/custom-objects/by-id/{id}`

## Path parameters

- `id` integer, required

## Headers

- `X-Api-Key` string, required
- `X-Workspace-Id` string

## Request body

- object
  - `form_fields` ApiV1CustomObjectsByIdIdPutRequestBodyContentApplicationJsonSchemaFormFields — Partial custom field values keyed by field reference_key. To rename the object, send form_fields.display_name. If absent, the existing display name is preserved. If present, it is trimmed, must be non-empty/ non-whitespace, and must be at most 255 characters.

## Response `200`

Successful response

- CustomObjectsPutapiV1CustomObjectsByIdIdResponse200 — Empty response body

---

[API](https://skmtc.net/atomicwork/apis/atomicwork-public-api.md) · [All operations](https://skmtc.net/atomicwork/apis/atomicwork-public-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/atomicwork/atomicwork-public-api/versions/2e7047b35062/schema)