> Call POST /v1/check before a tool that writes. DENY means do not invoke the tool. For clean Markdown of any page, append .md to the page URL. For the complete index, fetch https://docs.withwrit.com/llms.txt.

# Get one principal's policy override

GET https://api.withwrit.com/v1/policies/principals/{principalId}

API key required. Returns the principal's sparse override — only
the verbs it explicitly sets — in `policy`, plus the
`effectivePolicy` it resolves to and `policyProvenance`, which names
the winning layer (`principal`, `environment`, or `tenant`) per
verb. `?environment=dev|staging|prod` folds that environment's
override into the middle layer, exactly as a check naming it would
evaluate. An override that was never configured returns an empty
`policy`, `version: 0` ("no override yet").

Tombstoned principals still return 200 — they stay resolvable
forever — with `"inert": true`: their override never supplies a
mode while the principal is deleted or disabled. A principalId from
another tenant is 404.


Reference: https://docs.withwrit.com/api-reference/policy/get-one-principals-policy-override

## Servers

- `https://api.withwrit.com` (Writ gate, default)
- `https://j72ckh66ukck2kcbq3oiwxaalm0olxwb.lambda-url.us-east-1.on.aws` (Direct Lambda Function URL (fallback))

## Request

### Path parameters

- `principalId` (string, required)

### Query parameters

- `environment` (enum, optional)
  - Allowed values: `dev`, `staging`, `prod`

## Response

### 200

The override plus its effective policy and provenance.

## Errors

### 400 Bad Request Error

Unknown environment on `?environment=`.

- `any`

### 401 Unauthorized Error

API key required — missing, malformed, or unknown key.

- `any`

### 404 Not Found Error

No such principal in this tenant.

## Examples

**Response**

```json
{
  "effectivePolicy": {
    "admit": "require_grant",
    "prescribe": "require_grant",
    "provision": "require_grant",
    "refund": "step_up",
    "verify": "require_grant",
    "verify_human": "require_grant"
  },
  "environment": null,
  "inert": false,
  "modes": [
    "allow",
    "deny",
    "require_grant",
    "step_up"
  ],
  "policy": {
    "refund": "step_up"
  },
  "policyId": "pol_ten_3fa8b91c2d44_prn_prn_9d2f4a1b2c3d",
  "policyProvenance": {
    "admit": "tenant",
    "prescribe": "tenant",
    "provision": "tenant",
    "refund": "principal",
    "verify": "tenant",
    "verify_human": "tenant"
  },
  "principalId": "prn_9d2f4a1b2c3d",
  "principalName": "billing",
  "scope": "principal",
  "tenantId": "ten_3fa8b91c2d44",
  "updatedAt": 1759000200,
  "verbs": [
    "admit",
    "prescribe",
    "provision",
    "refund",
    "verify",
    "verify_human"
  ],
  "version": 2
}
```

**SDK Code**

```python Policy_getOnePrincipalsPolicyOverride_example
import requests

url = "https://api.withwrit.com/v1/policies/principals/principalId"

response = requests.get(url)

print(response.json())
```

```javascript Policy_getOnePrincipalsPolicyOverride_example
const url = 'https://api.withwrit.com/v1/policies/principals/principalId';
const options = {method: 'GET'};

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

```go Policy_getOnePrincipalsPolicyOverride_example
package main

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

func main() {

	url := "https://api.withwrit.com/v1/policies/principals/principalId"

	req, _ := http.NewRequest("GET", url, nil)

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

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

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

}
```

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

url = URI("https://api.withwrit.com/v1/policies/principals/principalId")

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

request = Net::HTTP::Get.new(url)

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

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

HttpResponse<String> response = Unirest.get("https://api.withwrit.com/v1/policies/principals/principalId")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://api.withwrit.com/v1/policies/principals/principalId');

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

```csharp Policy_getOnePrincipalsPolicyOverride_example
using RestSharp;

var client = new RestClient("https://api.withwrit.com/v1/policies/principals/principalId");
var request = new RestRequest(Method.GET);
IRestResponse response = client.Execute(request);
```

```swift Policy_getOnePrincipalsPolicyOverride_example
import Foundation

let request = NSMutableURLRequest(url: NSURL(string: "https://api.withwrit.com/v1/policies/principals/principalId")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"

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()
```