# Create audiences

URL: https://docs.hanzo.ai/docs/openapi/marketing/post-marketing-audiences

> Saves a cohort filter for the caller's org.

`POST /v1/marketing/audiences`

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

|               |                                               |
| ------------- | --------------------------------------------- |
| **Address**   | `https://api.hanzo.ai/v1/marketing/audiences` |
| **Method**    | `POST`                                        |
| **Operation** | `post_marketing_audiences`                    |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`        |

Saves a cohort filter for the caller's org. Name is required.
Omitting event saves the WHOLE-ORG audience — every mailable customer — which
needs no analytics warehouse; naming one narrows that roster to the customers
who fired it within windowDays.

## Request

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

| Field        | In   | Type            | Required | Description                                                                                                               |
| ------------ | ---- | --------------- | -------- | ------------------------------------------------------------------------------------------------------------------------- |
| `createdAt`  | body | integer (int64) | —        | CreatedAt is unix seconds when the filter was saved, server-assigned.                                                     |
| `event`      | body | string          | —        | Event is the analytics event a member must have fired.                                                                    |
| `id`         | body | string          | —        | ID is the server-assigned audience id ("aud\_" + 128 random bits).                                                        |
| `name`       | body | string          | —        | Name is the audience's label.                                                                                             |
| `updatedAt`  | body | integer (int64) | —        | UpdatedAt is unix seconds of the last write, server-assigned, and the key the audience list is ordered by (newest first). |
| `windowDays` | body | integer (int64) | —        | WindowDays is how far back the event counts, ending now.                                                                  |

## Response

| Status    | Body               | Meaning |
| --------- | ------------------ | ------- |
| `200`     | marketing.Audience | ok      |
| `default` | problem-details    | refused |

`200` body — 6 fields.

| Field        | In   | Type            | Always | Description                                                                                                               |
| ------------ | ---- | --------------- | ------ | ------------------------------------------------------------------------------------------------------------------------- |
| `createdAt`  | body | integer (int64) | —      | CreatedAt is unix seconds when the filter was saved, server-assigned.                                                     |
| `event`      | body | string          | —      | Event is the analytics event a member must have fired.                                                                    |
| `id`         | body | string          | —      | ID is the server-assigned audience id ("aud\_" + 128 random bits).                                                        |
| `name`       | body | string          | —      | Name is the audience's label.                                                                                             |
| `updatedAt`  | body | integer (int64) | —      | UpdatedAt is unix seconds of the last write, server-assigned, and the key the audience list is ordered by (newest first). |
| `windowDays` | body | integer (int64) | —      | WindowDays is how far back the event counts, ending now.                                                                  |

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

## Examples

**CLI**

```bash
hanzo marketing audiences create
```

**SDK**

**.ts**

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

const api = new MarketingApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.postMarketingAudiences({ createdAt: 0, event: "<event>" });
```

**.py**

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

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = MarketingApi(client).post_marketing_audiences(created_at=0, event="<event>")
```

**.go**

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

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

**.rs**

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

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

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

**.java**

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

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

var result = new MarketingApi(client).postMarketingAudiences();
```

**HTTP**

```bash
curl -X POST https://api.hanzo.ai/v1/marketing/audiences \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "createdAt": 0,
       "event": "<event>"
     }'
```

**MCP**

MCP reaches **marketing** through the `marketing` tool, which names its 35 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_marketing_audiences"
         }
       }
     }'
```

---

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