---
title: List the Content Scanning custom expressions of 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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# List the Content Scanning custom expressions of a zone.
GET/zones/{zone\_id}/content-upload-scan/payloads
List the Content Scanning custom expressions configured for the zone, each with its own identifier. A custom expression tells the scanner how to reach content objects in a request it cannot parse on its own, such as files Base64-encoded inside a JSON body.
##### 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``Zone WAF Read``Account WAF Write``Account WAF Read`
##### P ath ParametersExpand Collapse
zone\_id: string
Defines an identifier.
maxLength32
[Link to this property](<#(resource)%20content_scanning.payloads%20%3E%20(method)%20list%20%3E%20(params)%20default%20%3E%20(param)%20zone_id%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)%20list%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)%20list%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)%20list%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)%20list%20%3E%20(network%20schema)%20%3E%20(property)%20success>)
### List the Content Scanning custom expressions of a zone.
HTTP
HTTPTypeScriptPythonGoTerraform
```
curl https://api.cloudflare.com/client/v4/zones/$ZONE_ID/content-upload-scan/payloads \
-H "Authorization: Bearer $CLOUDFLARE_API_TOKEN"
```
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
}
```