---
title: Write multiple key-value pairs
---
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[KV](https://developers.cloudflare.com/api/resources/kv)
[Namespaces](https://developers.cloudflare.com/api/resources/kv/subresources/namespaces)
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# Write multiple key-value pairs
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`
##### P ath ParametersExpand Collapse
account\_id: string
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: string
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 ParametersJSONExpand Collapse
body: array of object {key, value, base64, 3 more }
key: string
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: string
A UTF-8 encoded string to be stored, up to 25 MiB in length.
maxLength26214400
Link to this property
base64: optional boolean
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 number
Expires the key at a certain time, measured in number of seconds since the UNIX epoch.
Link to this property
expiration\_ttl: optional number
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 unknown
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)%200%20%3E%20(param)%20body%20%3E%20(schema)>)
##### ReturnsExpand Collapse
errors: array of ResponseInfo { code, message, documentation\_url, source }
code: number
minimum1000
Link to this property
message: string
Link to this property
documentation\_url: optional string
Link to this property
source: optional object {pointer }
pointer: optional string
Link to this property
Link to this property
[Link to this property](<#(resource)%20kv.namespaces%20%3E%20(method)%20bulk_update%20%3E%20(network%20schema)%20%3E%20(property)%20errors>)
messages: array of ResponseInfo { code, message, documentation\_url, source }
code: number
minimum1000
Link to this property
message: string
Link to this property
documentation\_url: optional string
Link to this property
source: optional object {pointer }
pointer: optional string
Link to this property
Link to this property
[Link to this property](<#(resource)%20kv.namespaces%20%3E%20(method)%20bulk_update%20%3E%20(network%20schema)%20%3E%20(property)%20messages>)
success: true
Whether the API call was successful.
[Link to this property](<#(resource)%20kv.namespaces%20%3E%20(method)%20bulk_update%20%3E%20(network%20schema)%20%3E%20(property)%20success>)
result: optional object {successful\_key\_count, unsuccessful\_keys }
successful\_key\_count: optional number
Number of keys successfully written or deleted by the bulk operation.
Link to this property
unsuccessful\_keys: optional array of string
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(method)%20bulk_update%20%3E%20(network%20schema)%20%3E%20(property)%20result>)
### Write multiple key-value pairs
HTTP
HTTPTypeScriptPythonGoTerraform
```
curl https://api.cloudflare.com/client/v4/accounts/$ACCOUNT_ID/storage/kv/namespaces/$NAMESPACE_ID/bulk \
-X PUT \
-H 'Content-Type: application/json' \
-H "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
-d '[
{
"key": "My-Key",
"value": "Some string",
"base64": true,
"expiration": 1578435000,
"expiration_ttl": 300,
"metadata": {}
}
]'
```
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"
]
}
}
```