> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.jambonz.org/reference/rest-platform-management/call-routing/update-least-cost-routing-routes-and-carrier-entries/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.jambonz.org/_mcp/server.

# update least cost routing routes and carrier set entries

PUT https://api.jambonz.cloud/v1/Lcrs/{LcrSid}/Routes
Content-Type: application/json

Reference: https://docs.jambonz.org/reference/rest-platform-management/call-routing/update-least-cost-routing-routes-and-carrier-entries

## Authentication

- `Authorization` header (bearer token, required) — Bearer authentication of the form `Bearer <token>`, where token is your auth token.

## Request

### Path parameters

- `LcrSid` (string, required)

### Body (application/json)

This endpoint expects a list of LcrRouteAndCarrierEntries.

- `list of LcrRouteAndCarrierEntries`

## Response

### 204

least cost routing ruoutes and carrier entries updated

## Errors

### 400 Bad Request Error

bad request

- `msg` (string, required)

### 404 Not Found Error

least cost routing not found

- `any`

### 500 Internal Server Error

system error

- `msg` (string, required)

## Types

### LcrRouteAndCarrierEntries

- `lcr_sid` (string, required)
- `regex` (string, required) — out going call Phone number regex
- `priority` (integer, required)
- `description` (string, optional)
- `lcr_carrier_set_entries` (list of LcrCarrierSetEntry, optional)

### LcrCarrierSetEntry

- `lcr_route_sid` (string, required)
- `voip_carrier_sid` (string, required)
- `priority` (integer, required)
- `workload` (integer, optional) — traffic distribution value

## Examples

**Request**

```json
[
  {
    "lcr_sid": "a1b2c3d4-5678-90ab-cdef-1234567890ab",
    "regex": "^1[2-9]\\d{9}$",
    "priority": 1,
    "description": "Route for US domestic calls starting with 1"
  }
]
```

**Response**

```json
{}
```

**SDK Code**

```python
import requests

url = "https://api.jambonz.cloud/v1/Lcrs/LcrSid/Routes"

payload = [
    {
        "lcr_sid": "a1b2c3d4-5678-90ab-cdef-1234567890ab",
        "regex": "^1[2-9]\d{9}$",
        "priority": 1,
        "description": "Route for US domestic calls starting with 1"
    }
]
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://api.jambonz.cloud/v1/Lcrs/LcrSid/Routes';
const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '[{"lcr_sid":"a1b2c3d4-5678-90ab-cdef-1234567890ab","regex":"^1[2-9]\\d{9}$","priority":1,"description":"Route for US domestic calls starting with 1"}]'
};

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 := "https://api.jambonz.cloud/v1/Lcrs/LcrSid/Routes"

	payload := strings.NewReader("[\n  {\n    \"lcr_sid\": \"a1b2c3d4-5678-90ab-cdef-1234567890ab\",\n    \"regex\": \"^1[2-9]\\\\d{9}$\",\n    \"priority\": 1,\n    \"description\": \"Route for US domestic calls starting with 1\"\n  }\n]")

	req, _ := http.NewRequest("PUT", 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, _ := io.ReadAll(res.Body)

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

}
```

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

url = URI("https://api.jambonz.cloud/v1/Lcrs/LcrSid/Routes")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "[\n  {\n    \"lcr_sid\": \"a1b2c3d4-5678-90ab-cdef-1234567890ab\",\n    \"regex\": \"^1[2-9]\\\\d{9}$\",\n    \"priority\": 1,\n    \"description\": \"Route for US domestic calls starting with 1\"\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.put("https://api.jambonz.cloud/v1/Lcrs/LcrSid/Routes")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("[\n  {\n    \"lcr_sid\": \"a1b2c3d4-5678-90ab-cdef-1234567890ab\",\n    \"regex\": \"^1[2-9]\\\\d{9}$\",\n    \"priority\": 1,\n    \"description\": \"Route for US domestic calls starting with 1\"\n  }\n]")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('PUT', 'https://api.jambonz.cloud/v1/Lcrs/LcrSid/Routes', [
  'body' => '[
  {
    "lcr_sid": "a1b2c3d4-5678-90ab-cdef-1234567890ab",
    "regex": "^1[2-9]\\\\d{9}$",
    "priority": 1,
    "description": "Route for US domestic calls starting with 1"
  }
]',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.jambonz.cloud/v1/Lcrs/LcrSid/Routes");
var request = new RestRequest(Method.PUT);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "[\n  {\n    \"lcr_sid\": \"a1b2c3d4-5678-90ab-cdef-1234567890ab\",\n    \"regex\": \"^1[2-9]\\\\d{9}$\",\n    \"priority\": 1,\n    \"description\": \"Route for US domestic calls starting with 1\"\n  }\n]", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  [
    "lcr_sid": "a1b2c3d4-5678-90ab-cdef-1234567890ab",
    "regex": "^1[2-9]\d{9}$",
    "priority": 1,
    "description": "Route for US domestic calls starting with 1"
  ]
] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.jambonz.cloud/v1/Lcrs/LcrSid/Routes")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "PUT"
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()
```