---
title: "Delete custom column"
method: DELETE
path: "/v1/column/{column_id}"
tags: ["CustomColumns"]
---

# Delete custom column

`DELETE /v1/column/{column_id}`

## Request

- Base URL: `https://api.braintrust.dev`
- URL: `https://api.braintrust.dev/v1/column/{column_id}`
- Auth: one of:
  - HTTP bearer
  - none

Delete a custom column object by its id. Requires delete permission on the scoping object.

## Path parameters

- `column_id` string, uuid, required: CustomColumn id

## Response `200`

Returns the deleted custom column object

- CustomColumn
  - `id` string, uuid, required: Unique identifier for the custom columns
  - `object_type` 'organization' | 'project' | 'experiment' | 'dataset' | 'prompt' | 'prompt_session' | 'group' | 'role' | 'org_member' | 'project_log' | 'org_project' | 'org_audit_logs' | 'project_group' | 'project_group_projects' | 'ai_secret' | 'org_ai_secret' | 'org_account', required: The object type that the ACL applies to
  - `object_id` string, uuid, required: The id of the object the custom column is scoped for
  - `subtype` union, required: The object type that the ACL applies to
    - 'organization' | 'project' | 'experiment' | 'dataset' | 'prompt' | 'prompt_session' | 'group' | 'role' | 'org_member' | 'project_log' | 'org_project' | 'org_audit_logs' | 'project_group' | 'project_group_projects' | 'ai_secret' | 'org_ai_secret' | 'org_account': The object type that the ACL applies to
    - ''
  - `variant` 'project' | 'experiment' | 'dataset' | 'project_log' | 'experiment_list', required: The table variant that the custom column applies to
  - `name` string, required: The name of the custom column
  - `expr` string, required: The expression used to extract the value for the custom column
  - `created` string, date-time, nullable: Date of custom columns creation

## Other responses

- `400`: The request was unacceptable, often due to missing a required parameter
- `401`: No valid API key provided
- `403`: The API key doesn’t have permissions to perform the request
- `429`: Too many requests hit the API too quickly. We recommend an exponential backoff of your requests
- `500`: Something went wrong on Braintrust's end. (These are rare.)

## Changes

- **2026-11-04** `19184ec94018`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/braintrustdata/apis/braintrust-api/changes/v1/column/:column_id/delete.md)

---

[API](https://skmtc.dev/braintrustdata/apis/braintrust-api.md) - [All operations](https://skmtc.dev/braintrustdata/apis/braintrust-api/llms.txt) - [OpenAPI document](https://skmtc.dev/braintrustdata/apis/braintrust-api/revisions/19184ec94018?raw)