---
title: "Delete a custom parameter"
type: reference
method: POST
path: /rest-api/custom-parameters/{parameterId}/delete.do
tag: "Custom Parameters"
---

# Delete a custom parameter

`POST https://YOUR-NETWORK-DOMAIN/rest-api/custom-parameters/{parameterId}/delete.do`

Removes a parameter from the registry. Targeting rules that read it keep working, but a list parameter's rules go back to comparing the whole request value. A built-in parameter cannot be deleted. Requires the CUSTOM_PARAMETERS admin permission (Admin → Targeting presets → Custom parameters).

## Path params

| Name | Type | Required | Example | Description |
|---|---|---|---|---|
| `parameterId` | string | yes | `genre` | Parameter id or name |

## Responses

- `200` — {success}
- `400` — The parameter is built in
- `401` — Authentication error
- `403` — Insufficient permissions, naming the missing one
- `404` — No parameter with this id or name

## Example request

```bash
curl --request POST \
  --url 'https://YOUR-NETWORK-DOMAIN/rest-api/custom-parameters/genre/delete.do' \
  --header 'X-Api-Key: YOUR_API_KEY'
```

Source: https://epom.com/ad-server/docs/api/custom-parameters/post-custom-parameters-delete