---
title: Change Origin Post-Quantum Encryption setting
---
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[API Reference](https://developers.cloudflare.com/api)
[Origin Post Quantum Encryption](https://developers.cloudflare.com/api/resources/origin_post_quantum_encryption)
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# Change Origin Post-Quantum Encryption setting
Deprecated
PUT/zones/{zone\_id}/cache/origin\_post\_quantum\_encryption
Instructs Cloudflare to use Post-Quantum (PQ) key agreement algorithms when connecting to your origin. Preferred instructs Cloudflare to opportunistically send a Post-Quantum keyshare in the first message to the origin (for fastest connections when the origin supports and prefers PQ), supported means that PQ algorithms are advertised but only used when requested by the origin, and off means that PQ algorithms are not advertised.
##### 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)
`Zone Settings Write``Zone Write`
##### P ath ParametersExpand Collapse
zone\_id: string
Identifier.
maxLength32
[Link to this property](<#(resource)%20origin_post_quantum_encryption%20%3E%20(method)%20update%20%3E%20(params)%20default%20%3E%20(param)%20zone_id%20%3E%20(schema)>)
##### Body ParametersJSONExpand Collapse
value: "preferred"or "supported"or "off"
Value of the Origin Post Quantum Encryption Setting.
One of the following:
"preferred"
Link to this property
"supported"
Link to this property
"off"
Link to this property
[Link to this property](<#(resource)%20origin_post_quantum_encryption%20%3E%20(method)%20update%20%3E%20(params)%200%20%3E%20(param)%20value%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)%20origin_post_quantum_encryption%20%3E%20(method)%20update%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)%20origin_post_quantum_encryption%20%3E%20(method)%20update%20%3E%20(network%20schema)%20%3E%20(property)%20messages>)
success: true
Whether the API call was successful.
[Link to this property](<#(resource)%20origin_post_quantum_encryption%20%3E%20(method)%20update%20%3E%20(network%20schema)%20%3E%20(property)%20success>)
result: optional object {id, editable, value, modified\_on }
id: "origin\_pqe"
The identifier of the caching setting.
Link to this property
editable: boolean
Whether the setting is editable.
Link to this property
value: "preferred"or "supported"or "off"
Value of the Origin Post Quantum Encryption Setting.
One of the following:
"preferred"
Link to this property
"supported"
Link to this property
"off"
Link to this property
Link to this property
modified\_on: optional string
Last time this setting was modified.
formatdate-time
Link to this property
[Link to this property](<#(resource)%20origin_post_quantum_encryption%20%3E%20(method)%20update%20%3E%20(network%20schema)%20%3E%20(property)%20result>)
### Change Origin Post-Quantum Encryption setting
HTTP
HTTPTypeScriptPythonGoTerraform
```
curl https://api.cloudflare.com/client/v4/zones/$ZONE_ID/cache/origin_post_quantum_encryption \
-X PUT \
-H 'Content-Type: application/json' \
-H "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
-d '{
"value": "preferred"
}'
```
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": {
"id": "origin_pqe",
"editable": true,
"value": "preferred",
"modified_on": "2014-01-01T05:20:00.12345Z"
}
}
```
##### 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": {
"id": "origin_pqe",
"editable": true,
"value": "preferred",
"modified_on": "2014-01-01T05:20:00.12345Z"
}
}
```