# Create alerts

URL: https://docs.hanzo.ai/docs/openapi/billing/post-billing-alerts

> Opens a spend cap on the caller's own org.

`POST /v1/billing/alerts`

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

|               |                                          |
| ------------- | ---------------------------------------- |
| **Address**   | `https://api.hanzo.ai/v1/billing/alerts` |
| **Method**    | `POST`                                   |
| **Operation** | `post_billing_alerts`                    |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`   |

Opens a spend cap on the caller's own org.

At least one limit must mean something: a threshold above zero (a spend cap)
or a requests-per-minute above zero (a rate limit). A row that bounds neither
is refused rather than stored, because a ceiling nothing measures against is a
ceiling a customer believes in and does not have.

The cap is keyed on the caller's own billing subject, resolved server-side —
the SAME key the verdict looks it up under, which is what makes enforcement
bind rather than merely record.

A named handler, not a closure, so zipdoc can lift this prose into the registry.

## Request

9 fields, body `application/json` (required).

| Field          | In   | Type            | Required | Description |
| -------------- | ---- | --------------- | -------- | ----------- |
| `currency`     | body | string          | —        |             |
| `enforce`      | body | boolean         | —        |             |
| `project`      | body | string          | —        |             |
| `rateLimitRpm` | body | integer (int64) | —        |             |
| `service`      | body | string          | —        |             |
| `softPct`      | body | integer (int64) | —        |             |
| `subject`      | body | string          | —        |             |
| `threshold`    | body | integer (int64) | —        |             |
| `title`        | body | string          | —        |             |

## Response

| Status    | Body            | Meaning |
| --------- | --------------- | ------- |
| `201`     | billing.Alert   | created |
| `default` | problem-details | refused |

`201` body — 18 fields.

| Field              | In   | Type            | Always | Description |
| ------------------ | ---- | --------------- | ------ | ----------- |
| `createdAt`        | body | string          | —      |             |
| `currency`         | body | string          | —      |             |
| `enforce`          | body | boolean         | —      |             |
| `id`               | body | string          | —      |             |
| `over`             | body | boolean         | —      |             |
| `period`           | body | string          | —      |             |
| `periodSpentCents` | body | integer (int64) | —      |             |
| `project`          | body | string          | —      |             |
| `rateLimitRpm`     | body | integer (int64) | —      |             |
| `resetsAt`         | body | string          | —      |             |
| `service`          | body | string          | —      |             |
| `softPct`          | body | integer (int64) | —      |             |
| `threshold`        | body | integer (int64) | —      |             |
| `title`            | body | string          | —      |             |
| `triggeredAt`      | body | string          | —      |             |
| `updatedAt`        | body | string          | —      |             |
| `userId`           | body | string          | —      |             |
| `warn`             | body | boolean         | —      |             |

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

## Examples

**CLI**

```bash
hanzo billing alerts create
```

**SDK**

**.ts**

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

const api = new BillingApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.postBillingAlerts({ currency: "<currency>", enforce: false });
```

**.py**

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

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = BillingApi(client).post_billing_alerts(currency="<currency>", enforce=False)
```

**.go**

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

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

**.rs**

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

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

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

**.java**

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

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

var result = new BillingApi(client).postBillingAlerts();
```

**HTTP**

```bash
curl -X POST https://api.hanzo.ai/v1/billing/alerts \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "currency": "<currency>",
       "enforce": false
     }'
```

**MCP**

MCP reaches **billing** through the `billing` tool, which names its 39 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": "list_billing_accounts"
         }
       }
     }'
```

---

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