# Create suppressions

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

> Records an opt-out for the org (admin / self-service management).

`POST /v1/marketing/suppressions`

> [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/suppressions` |
| **Method**    | `POST`                                           |
| **Operation** | `post_marketing_suppressions`                    |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`           |

Records an opt-out for the org (admin / self-service
management). Address is required; channel defaults to email. It is idempotent:
re-suppressing the same tuple keeps the original record rather than erroring.
From here on the ONE send gate refuses that recipient on that channel.

## Request

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

| Field       | In   | Type            | Required | Description                                                                                                                          |
| ----------- | ---- | --------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------ |
| `address`   | body | string          | —        | Address is the recipient, normalized (lower-cased, trimmed) so an opt-out cannot be slipped past on a case or whitespace difference. |
| `channel`   | body | string          | —        | Channel is the surface opted out of: email, sms, social, meta, google or tiktok.                                                     |
| `createdAt` | body | integer (int64) | —        | CreatedAt is unix seconds, server-assigned.                                                                                          |
| `reason`    | body | string          | —        | Reason is a free-text note, capped at 1024 bytes.                                                                                    |

## Response

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

`200` body — 4 fields.

| Field       | In   | Type            | Always | Description                                                                                                                          |
| ----------- | ---- | --------------- | ------ | ------------------------------------------------------------------------------------------------------------------------------------ |
| `address`   | body | string          | —      | Address is the recipient, normalized (lower-cased, trimmed) so an opt-out cannot be slipped past on a case or whitespace difference. |
| `channel`   | body | string          | —      | Channel is the surface opted out of: email, sms, social, meta, google or tiktok.                                                     |
| `createdAt` | body | integer (int64) | —      | CreatedAt is unix seconds, server-assigned.                                                                                          |
| `reason`    | body | string          | —      | Reason is a free-text note, capped at 1024 bytes.                                                                                    |

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

## Examples

**CLI**

```bash
hanzo marketing suppressions 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.postMarketingSuppressions({ address: "<address>", channel: "<channel>" });
```

**.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_suppressions(address="<address>", channel="<channel>")
```

**.go**

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

resp, _, err := client.MarketingAPI.PostMarketingSuppressions(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_suppressions(&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).postMarketingSuppressions();
```

**HTTP**

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

**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)