# Create buckets

URL: https://docs.hanzo.ai/docs/openapi/s3/post-s3-buckets

> Makes a new bucket for the caller's org and answers 201 with it.

`POST /v1/s3/buckets`

> [S3 →](https://docs.hanzo.ai/docs/openapi/s3) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides)

|               |                                        |
| ------------- | -------------------------------------- |
| **Address**   | `https://api.hanzo.ai/v1/s3/buckets`   |
| **Method**    | `POST`                                 |
| **Operation** | `post_s3_buckets`                      |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY` |

Makes a new bucket for the caller's org and answers 201 with it.

The physical name is derived from the caller's validated org, so a tenant can
only ever create inside its own namespace and no request field can redirect
that. A name already taken in the org is 409.

Billed per call: the balance is checked BEFORE anything is touched, so an
unfunded org is refused with nothing created, and the debit lands only once the
bucket exists.

## Request

1 field, body `application/json` (required).

| Field  | In   | Type   | Required | Description                                                                                   |
| ------ | ---- | ------ | -------- | --------------------------------------------------------------------------------------------- |
| `name` | body | string | —        | Name is the bucket's friendly name, matching ^[a-z0-9](https://docs.hanzo.ai/docs/openapi)?$. |

## Response

| Status    | Body            | Meaning |
| --------- | --------------- | ------- |
| `201`     | s3.bucketItem   | created |
| `default` | problem-details | refused |

`201` body — 2 fields.

| Field       | In   | Type            | Always | Description   |
| ----------- | ---- | --------------- | ------ | ------------- |
| `createdAt` | body | integer (int64) | —      | unix seconds  |
| `name`      | body | string          | —      | friendly name |

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

## Examples

**CLI**

```bash
hanzo s3 buckets create
```

**SDK**

**.ts**

```ts
import { Configuration, S3Api } from 'hanzoai';

const api = new S3Api(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.postS3Buckets({ name: "<name>" });
```

**.py**

```python
from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import S3Api

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = S3Api(client).post_s3_buckets(name="<name>")
```

**.go**

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

resp, _, err := client.S3API.PostS3Buckets(context.Background()).Execute()
if err != nil {
	return err
}
```

**.rs**

```rust
use hanzo_client::apis::{configuration::Configuration, s3_api};

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

let result = s3_api::post_s3_buckets(&cfg, Default::default()).await?;
```

**.java**

```java
import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.S3Api;

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

var result = new S3Api(client).postS3Buckets();
```

**HTTP**

```bash
curl -X POST https://api.hanzo.ai/v1/s3/buckets \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "name": "<name>"
     }'
```

**MCP**

MCP reaches **s3** through the `s3` tool, which names its 6 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_s3_buckets"
         }
       }
     }'
```

---

[S3 API](https://docs.hanzo.ai/docs/openapi/s3) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)