---
title: Create Content Scanning custom expressions for a zone.
---
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[API Reference](https://developers.cloudflare.com/api)
[Content Scanning](https://developers.cloudflare.com/api/resources/content_scanning)
[Payloads](https://developers.cloudflare.com/api/resources/content_scanning/subresources/payloads)
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# Create Content Scanning custom expressions for a zone.
POST/zones/{zone\_id}/content-upload-scan/payloads
Create one or more Content Scanning custom expressions, appending them to the existing list of the zone, and return the updated list. Each expression reaches content objects the scanner cannot find automatically, for example `lookup_json_string(http.request.body.raw, "file")`.
##### 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 WAF Write``Account WAF Write`
##### P ath ParametersExpand Collapse
zone\_id: string
Defines an identifier.
maxLength32
[Link to this property](<#(resource)%20content_scanning.payloads%20%3E%20(method)%20create%20%3E%20(params)%20default%20%3E%20(param)%20zone_id%20%3E%20(schema)>)
##### Body ParametersJSONExpand Collapse
body: array of object {payload }
payload: string
Defines the custom content extraction expression used to reach content objects in the request.
Link to this property
[Link to this property](<#(resource)%20content_scanning.payloads%20%3E%20(method)%20create%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)%20content_scanning.payloads%20%3E%20(method)%20create%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)%20content_scanning.payloads%20%3E%20(method)%20create%20%3E%20(network%20schema)%20%3E%20(property)%20messages>)
result: array of object {id, payload }
id: optional string
Defines the unique ID for this Content Scanning custom expression.
maxLength32
Link to this property
payload: optional string
Defines the custom content extraction expression used to reach content objects in the request.
Link to this property
[Link to this property](<#(resource)%20content_scanning.payloads%20%3E%20(method)%20create%20%3E%20(network%20schema)%20%3E%20(property)%20result>)
success: true
Whether the API call was successful.
[Link to this property](<#(resource)%20content_scanning.payloads%20%3E%20(method)%20create%20%3E%20(network%20schema)%20%3E%20(property)%20success>)
### Create Content Scanning custom expressions for a zone.
HTTP
HTTPTypeScriptPythonGoTerraform
```
curl https://api.cloudflare.com/client/v4/zones/$ZONE_ID/content-upload-scan/payloads \
-H 'Content-Type: application/json' \
-H "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
-d '[
{
"payload": "lookup_json_string(http.request.body.raw, \\"file\\")"
}
]'
```
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"
}
}
],
"result": [
{
"id": "a350a054caa840c9becd89c3b4f0195b",
"payload": "lookup_json_string(http.request.body.raw, \"file\")"
}
],
"success": true
}
```
##### 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"
}
}
],
"result": [
{
"id": "a350a054caa840c9becd89c3b4f0195b",
"payload": "lookup_json_string(http.request.body.raw, \"file\")"
}
],
"success": true
}
```