--- title: Write multiple key-value pairs --- [Skip to content](#_top) [API Reference](https://developers.cloudflare.com/api/python) [KV](https://developers.cloudflare.com/api/python/resources/kv) [Namespaces](https://developers.cloudflare.com/api/python/resources/kv/subresources/namespaces) Copy Markdown Open in **Claude**Open in **ChatGPT**Open in **Cursor** --- **Copy Markdown****View as Markdown** # Write multiple key-value pairs kv.namespaces.bulk\_update(strnamespace\_id, NamespaceBulkUpdateParams\*\*kwargs) -> [NamespaceBulkUpdateResponse]() PUT/accounts/{account\_id}/storage/kv/namespaces/{namespace\_id}/bulk Writes up to 10,000 key-value pairs to the specified Workers KV namespace from a JSON array, with optional metadata and expiration settings for each pair. Existing values and expirations are overwritten. If neither `expiration` nor `expiration_ttl` is specified, the key-value pair will not expire. If both are set, `expiration_ttl` takes precedence. The entire request must be 100 megabytes or less. The result reports the number of successful writes and any keys that failed and should be retried. ##### Security
API Token The preferred authorization scheme for interacting with the Cloudflare API. Create a token. **Example:**Authorization: Bearer Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY
API Email + API Key The previous authorization scheme for interacting with the Cloudflare API, used in conjunction with a Global API key. **Example:**X-Auth-Email: user@example.com The previous authorization scheme for interacting with the Cloudflare API. When possible, use API tokens instead of Global API keys. **Example:**X-Auth-Key: 144c9defac04969c7bfad8efaa8ea194
##### Accepted Permissions (at least one required) `Workers KV Storage Write` ##### ParametersExpand Collapse account\_id: str ID of the Cloudflare account that owns the Workers KV namespaces. maxLength32 [Link to this property](<#(resource)%20kv.namespaces%20%3E%20(method)%20bulk_update%20%3E%20(params)%20default%20%3E%20(param)%20account_id%20%3E%20(schema)>) namespace\_id: str ID of the Workers KV namespace. maxLength32 [Link to this property](<#(resource)%20kv.namespaces%20%3E%20(method)%20bulk_update%20%3E%20(params)%20default%20%3E%20(param)%20namespace_id%20%3E%20(schema)>)
body: Iterable\[Body] key: str A key’s name. The name may be at most 512 bytes. All printable, non-whitespace characters are valid. maxLength512 Link to this property value: str A UTF-8 encoded string to be stored, up to 25 MiB in length. maxLength26214400 Link to this property base64: Optional\[bool] Indicates whether or not the server should base64 decode the value before storing it. Useful for writing values that wouldn’t otherwise be valid JSON strings, such as images. Link to this property expiration: Optional\[float] Expires the key at a certain time, measured in number of seconds since the UNIX epoch. Link to this property expiration\_ttl: Optional\[float] Number of seconds until the key expires. Must be at least 60. Takes precedence over expiration when both are specified. minimum60 Link to this property metadata: Optional\[object] Arbitrary JSON that is associated with a key. Link to this property
[Link to this property](<#(resource)%20kv.namespaces%20%3E%20(method)%20bulk_update%20%3E%20(params)%20default%20%3E%20(param)%20body%20%3E%20(schema)>) ##### ReturnsExpand Collapse
class NamespaceBulkUpdateResponse: … successful\_key\_count: Optional\[float] Number of keys successfully written or deleted by the bulk operation. Link to this property unsuccessful\_keys: Optional\[List\[str]] Names of keys that failed to be written or deleted. Retry the operation for these keys. Link to this property
[Link to this property](<#(resource)%20kv.namespaces%20%3E%20(model)%20namespace_bulk_update_response%20%3E%20(schema)>) ### Write multiple key-value pairs Python HTTPTypeScriptPythonGoTerraform ``` import os from cloudflare import Cloudflare client = Cloudflare( api_token=os.environ.get("CLOUDFLARE_API_TOKEN"), # This is the default and can be omitted ) response = client.kv.namespaces.bulk_update( namespace_id="0f2ac74b498b48028cb68387c421e279", account_id="023e105f4ecef8ad9ca31a8372d0c353", body=[{ "key": "My-Key", "value": "Some string", }], ) print(response.successful_key_count) ``` 200 example ``` { "errors": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "messages": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "success": true, "result": { "successful_key_count": 100, "unsuccessful_keys": [ "string" ] } } ``` ##### Returns Examples 200 example ``` { "errors": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "messages": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "success": true, "result": { "successful_key_count": 100, "unsuccessful_keys": [ "string" ] } } ```