> This page is for version v2024-12-23.
> For other versions, use one of these documentation indexes:
> - v2026-02-09 (default): https://docs.extend.ai/2026-02-09/llms.txt
> - v2025-04-21: https://docs.extend.ai/2025-04-21/llms.txt
> - v2024-12-23: https://docs.extend.ai/2024-12-23/llms.txt

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.extend.ai/llms.txt
> Use this file to discover all available pages before exploring further.
>
> ## API version
> The current API version is `2026-02-09`, served at the site root (no version prefix in URLs).
> If this page URL contains `/2025-04-21/` or `/2024-12-23/`, you are reading an older API version.
> Prefer the current docs at https://docs.extend.ai/llms.txt unless the user explicitly needs that older version.
> Do not treat older-version pages as the source of truth for new integrations.

# Update Evaluation Set Item

If you need to change the expected output for a given evaluation set item, you can use this endpoint to update the item. This can be useful if you need to correct an error in the expected output or if the output of the processor has changed.

### Parameters

**`id`** `string`

The ID of the evaluation set item to update.

---

### Body

**`expectedOutput`** `object` — required, default: \{ hi: 'hi' }

The expected output of the processor when run against the file. This should be
a JSON object conforming to the [output type schema](/2024-12-23/developers/guides/output-types) of the processor.

---

### Response

**`success`** `boolean`

A true or false value for whether the evaluation set item was created
successfully or not.

---

**`evaluationSetItem`** `EvaluationSetItem`

An EvaluationSetItem object representing the newly created evaluation set
item. See the [EvaluationSetItem object](/2024-12-23/developers/objects/evaluation-set-item) for more details.

---

```curl
curl --request POST \
  --url https://api-prod.extend.app/evaluation_set_items/:id \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "expectedOutput": {}
}'
```

```python
import requests

url = "https://api-prod.extend.app/evaluation_set_items/:id"

payload = {"expectedOutput": {}}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.request("POST", url, json=payload, headers=headers)

print(response.text)
```

```javascript
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"expectedOutput":{}}'
};

fetch('https://api-prod.extend.app/evaluation_set_items/:id', options)
  .then(response => response.json())
  .then(response => console.log(response))
  .catch(err => console.error(err));
```

```php
<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api-prod.extend.app/evaluation_set_items/:id",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "{\n  \"expectedOutput\": {}\n}",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io/ioutil"
)

func main() {

	url := "https://api-prod.extend.app/evaluation_set_items/:id"

	payload := strings.NewReader("{\n  \"expectedOutput\": {}\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := ioutil.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```java
HttpResponse<String> response = Unirest.post("https://api-prod.extend.app/evaluation_set_items/:id")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"expectedOutput\": {}\n}")
  .asString();
```

**`Example Response`**

```json Example Response
{
  "success": true,
  "evaluationSetItem": {
    "object": "evaluation_set_item",
    "id": "eval_item_1234",
    "evaluationSetId": "eval_set_1234",
    "fileId": "file_1234",
    "expectedOutput": {
      // Output object - see “Processor output types” for details
    },
    "createdAt": "2024-01-01T00:00:00Z",
    "updatedAt": "2024-01-01T00:00:00Z"
  }
}
```