# Delete defs

URL: https://docs.hanzo.ai/docs/openapi/flag/delete-flag-defs-by-key

> Removes one flag definition by key and records the deletion in the change log.

`DELETE /v1/flag/defs/{key}`

> [Flag →](https://docs.hanzo.ai/docs/openapi/flag) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides)

|               |                                           |
| ------------- | ----------------------------------------- |
| **Address**   | `https://api.hanzo.ai/v1/flag/defs/{key}` |
| **Method**    | `DELETE`                                  |
| **Operation** | `delete_flag_defs_by_key`                 |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`    |

Removes one flag definition by key and records the
deletion in the change log. A key the caller's store does not hold is a 404.
A staged capability's key is a SuperAdmin's to remove, as it is to set, and
every other key an owner's or admin's of the org.

## Request

1 field.

| Field | In   | Type   | Required | Description                                   |
| ----- | ---- | ------ | -------- | --------------------------------------------- |
| `key` | path | string | yes      | Key is the flag key to act on, from the path. |

## Response

| Status    | Body            | Meaning |
| --------- | --------------- | ------- |
| `200`     | flag.deletedOut | ok      |
| `default` | problem-details | refused |

`200` body — 1 field.

| Field     | In   | Type   | Always | Description                               |
| --------- | ---- | ------ | ------ | ----------------------------------------- |
| `deleted` | body | string | —      | Deleted is the key that no longer exists. |

Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors).

## Examples

**CLI**

```bash
hanzo flag defs rm <key>
```

**SDK**

**.ts**

```ts
import { Configuration, FlagApi } from 'hanzoai';

const api = new FlagApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.deleteFlagDefsByKey({ key: 'key' });
```

**.py**

```python
from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import FlagApi

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = FlagApi(client).delete_flag_defs_by_key(key='key')
```

**.go**

```go
cfg := hanzoai.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := hanzoai.NewAPIClient(cfg)

resp, _, err := client.FlagAPI.DeleteFlagDefsByKey(context.Background()).Execute()
if err != nil {
	return err
}
```

**.rs**

```rust
use hanzo_client::apis::{configuration::Configuration, flag_api};

let mut cfg = Configuration::new();
cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok();

let result = flag_api::delete_flag_defs_by_key(&cfg, Default::default()).await?;
```

**.java**

```java
import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.FlagApi;

ApiClient client = new ApiClient();
client.setBearerToken(System.getenv("HANZO_API_KEY"));

var result = new FlagApi(client).deleteFlagDefsByKey();
```

**HTTP**

```bash
curl -X DELETE https://api.hanzo.ai/v1/flag/defs/<key> \
  -H "Authorization: Bearer $HANZO_API_KEY"
```

**MCP**

MCP reaches **flag** through the `flag` tool, which names its 8 operations with its own verbs — this one among them, under a name only MCP declares. `describe` explains any of them:

```bash
curl -X POST https://api.hanzo.ai/v1/mcp \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "describe",
         "arguments": {
           "op": "get_flag_activity"
         }
       }
     }'
```

---

[Flag API](https://docs.hanzo.ai/docs/openapi/flag) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)