> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://www.comet.com/docs/opik/reference/rest-api/guardrails/create-guardrails/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://www.comet.com/_mcp/server.

# Create guardrails for traces in a batch

POST http://localhost:5173/api/v1/private/guardrails
Content-Type: application/json

Batch guardrails for traces

Reference: https://www.comet.com/docs/opik/reference/rest-api/guardrails/create-guardrails

## Servers

- `http://localhost:5173/api` (Local server, default)
- `https://www.comet.com/opik/api` (Opik Cloud)

## Request

### Body (application/json)

This endpoint expects a GuardrailBatch_Write.

- `guardrails` (list of Guardrail_Write, required)

## Response

### 204

No Content

## Types

### Guardrail_Write

- `entity_id` (string, required)
- `secondary_id` (string, required)
- `name` (enum, required)
  - Allowed values: `TOPIC`, `PII`, `LLM_JUDGE`, `PROMPT_INJECTION`, `CUSTOM_CLASSIFIER`
- `result` (enum, required)
  - Allowed values: `passed`, `failed`
- `config` (JsonNode, required)
- `details` (JsonNode, required)
- `project_name` (string, optional) — If null, the default project is used
- `project_id` (string, optional)

### JsonNode

## Examples

**Request**

```json
{
  "guardrails": [
    {
      "entity_id": "string",
      "secondary_id": "string",
      "name": "TOPIC",
      "result": "passed",
      "config": {},
      "details": {}
    }
  ]
}
```

**SDK Code**

```python
import requests

url = "http://localhost:5173/api/v1/private/guardrails"

payload = { "guardrails": [
        {
            "entity_id": "string",
            "secondary_id": "string",
            "name": "TOPIC",
            "result": "passed",
            "config": {},
            "details": {}
        }
    ] }
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'http://localhost:5173/api/v1/private/guardrails';
const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: '{"guardrails":[{"entity_id":"string","secondary_id":"string","name":"TOPIC","result":"passed","config":{},"details":{}}]}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

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

func main() {

	url := "http://localhost:5173/api/v1/private/guardrails"

	payload := strings.NewReader("{\n  \"guardrails\": [\n    {\n      \"entity_id\": \"string\",\n      \"secondary_id\": \"string\",\n      \"name\": \"TOPIC\",\n      \"result\": \"passed\",\n      \"config\": {},\n      \"details\": {}\n    }\n  ]\n}")

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

	req.Header.Add("Content-Type", "application/json")

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

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

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

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("http://localhost:5173/api/v1/private/guardrails")

http = Net::HTTP.new(url.host, url.port)

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"guardrails\": [\n    {\n      \"entity_id\": \"string\",\n      \"secondary_id\": \"string\",\n      \"name\": \"TOPIC\",\n      \"result\": \"passed\",\n      \"config\": {},\n      \"details\": {}\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("http://localhost:5173/api/v1/private/guardrails")
  .header("Content-Type", "application/json")
  .body("{\n  \"guardrails\": [\n    {\n      \"entity_id\": \"string\",\n      \"secondary_id\": \"string\",\n      \"name\": \"TOPIC\",\n      \"result\": \"passed\",\n      \"config\": {},\n      \"details\": {}\n    }\n  ]\n}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'http://localhost:5173/api/v1/private/guardrails', [
  'body' => '{
  "guardrails": [
    {
      "entity_id": "string",
      "secondary_id": "string",
      "name": "TOPIC",
      "result": "passed",
      "config": {},
      "details": {}
    }
  ]
}',
  'headers' => [
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("http://localhost:5173/api/v1/private/guardrails");
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"guardrails\": [\n    {\n      \"entity_id\": \"string\",\n      \"secondary_id\": \"string\",\n      \"name\": \"TOPIC\",\n      \"result\": \"passed\",\n      \"config\": {},\n      \"details\": {}\n    }\n  ]\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Content-Type": "application/json"]
let parameters = ["guardrails": [
    [
      "entity_id": "string",
      "secondary_id": "string",
      "name": "TOPIC",
      "result": "passed",
      "config": [],
      "details": []
    ]
  ]] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "http://localhost:5173/api/v1/private/guardrails")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```

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