---
title: Get Field Extractor
---
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[API Reference](https://developers.cloudflare.com/api)
[Field Extractors](https://developers.cloudflare.com/api/resources/field_extractors)
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# Get Field Extractor
GET/accounts/{account\_id}/field\_extractors/{extractor}
Retrieves the custom extraction rules configured for a given extractor type.
##### 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
##### P ath ParametersExpand Collapse
account\_id: string
Cloudflare account ID.
minLength1
[Link to this property](<#(resource)%20field_extractors%20%3E%20(method)%20get%20%3E%20(params)%20default%20%3E%20(param)%20account_id%20%3E%20(schema)>)
extractor: string
Extractor type.
minLength1
[Link to this property](<#(resource)%20field_extractors%20%3E%20(method)%20get%20%3E%20(params)%20default%20%3E%20(param)%20extractor%20%3E%20(schema)>)
##### ReturnsExpand Collapse
errors: array of object {code, message, source }
code: number
Link to this property
message: string
Link to this property
source: optional object {pointer }
Points to the offending input as a JSON Pointer into the request body.
pointer: string
Link to this property
Link to this property
[Link to this property](<#(resource)%20field_extractors%20%3E%20(method)%20get%20%3E%20(network%20schema)%20%3E%20(property)%20errors>)
messages: array of object {code, message }
Additional informational messages.
code: number
Link to this property
message: string
Link to this property
[Link to this property](<#(resource)%20field_extractors%20%3E%20(method)%20get%20%3E%20(network%20schema)%20%3E%20(property)%20messages>)
result: object {extractor, rules }
extractor: string
Extractor type.
Link to this property
rules: array of object {fields, ref, description }
fields: array of object {expression, name }
expression: string
Wirefilter value expression.
Link to this property
name: string
Field name.
Link to this property
Link to this property
ref: string
Stable rule identifier.
Link to this property
description: optional string
Human-readable rule description.
Link to this property
Link to this property
[Link to this property](<#(resource)%20field_extractors%20%3E%20(method)%20get%20%3E%20(network%20schema)%20%3E%20(property)%20result>)
success: true
[Link to this property](<#(resource)%20field_extractors%20%3E%20(method)%20get%20%3E%20(network%20schema)%20%3E%20(property)%20success>)
### Get Field Extractor
HTTP
HTTPTypeScriptPythonGoTerraform
```
curl https://api.cloudflare.com/client/v4/accounts/$ACCOUNT_ID/field_extractors/$EXTRACTOR \
-H "Authorization: Bearer $CLOUDFLARE_API_TOKEN"
```
200 example
```
{
"errors": [
{
"code": 0,
"message": "message",
"source": {
"pointer": "pointer"
}
}
],
"messages": [
{
"code": 0,
"message": "message"
}
],
"result": {
"extractor": "llm_prompts",
"rules": [
{
"fields": [
{
"expression": "filter(http.request.body.json.strings.values, http.request.body.json.strings.pointers[*] matches \"^/messages/\\\\d+/content$\")",
"name": "prompt"
}
],
"ref": "openai-chat",
"description": "description"
}
]
},
"success": true
}
```
##### Returns Examples
200 example
```
{
"errors": [
{
"code": 0,
"message": "message",
"source": {
"pointer": "pointer"
}
}
],
"messages": [
{
"code": 0,
"message": "message"
}
],
"result": {
"extractor": "llm_prompts",
"rules": [
{
"fields": [
{
"expression": "filter(http.request.body.json.strings.values, http.request.body.json.strings.pointers[*] matches \"^/messages/\\\\d+/content$\")",
"name": "prompt"
}
],
"ref": "openai-chat",
"description": "description"
}
]
},
"success": true
}
```