# Replace values

URL: https://docs.hanzo.ai/docs/openapi/cloudflare/put-cloudflare-kv-namespaces-by-namespace-values-by-key

> Stores one KV key on the org's OWN Cloudflare account.

`PUT /v1/cloudflare/kv/namespaces/{namespace}/values/{key}`

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

|               |                                                                             |
| ------------- | --------------------------------------------------------------------------- |
| **Address**   | `https://api.hanzo.ai/v1/cloudflare/kv/namespaces/{namespace}/values/{key}` |
| **Method**    | `PUT`                                                                       |
| **Operation** | `put_cloudflare_kv_namespaces_by_namespace_values_by_key`                   |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`                                      |

Stores one KV key on the org's OWN Cloudflare account. The REQUEST BODY IS THE VALUE, forwarded verbatim under the caller's own Content-Type (`text/plain` when none is sent), so a value is never re-encoded on the way in — which is why this is not a typed op. `expiration` and `expiration_ttl` may ride the query string and are passed through to Cloudflare. Requires ORG ADMIN (403 otherwise); the same namespace and key validation as the read answers 400; 503 if the org has never connected a Cloudflare token.

## Request

2 fields.

| Field       | In   | Type   | Required | Description |
| ----------- | ---- | ------ | -------- | ----------- |
| `namespace` | path | string | yes      |             |
| `key`       | path | string | yes      |             |

## Response

The document declares no response body for this operation. It answers `200` on success and the platform error shape on failure — see [Errors](https://docs.hanzo.ai/docs/errors).

## Examples

**CLI**

```bash
hanzo cloudflare kv namespaces values set <namespace> <key>
```

**SDK**

**.ts**

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

const api = new CloudflareApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.putCloudflareKvNamespacesByNamespaceValuesByKey({ namespace: 'namespace', key: 'key' });
```

**.py**

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

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = CloudflareApi(client).put_cloudflare_kv_namespaces_by_namespace_values_by_key(namespace='namespace', key='key')
```

**.go**

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

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

**.rs**

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

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

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

**.java**

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

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

var result = new CloudflareApi(client).putCloudflareKvNamespacesByNamespaceValuesByKey();
```

**HTTP**

```bash
curl -X PUT https://api.hanzo.ai/v1/cloudflare/kv/namespaces/<namespace>/values/<key> \
  -H "Authorization: Bearer $HANZO_API_KEY"
```

**MCP**

MCP reaches **cloudflare** through the `cloudflare` tool, which names its 29 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_cloudflare_d1_databases"
         }
       }
     }'
```

---

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