> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes.

# Deploy call flow version

POST https://%7BYour_Space_Name%7D.signalwire.com/api/fabric/resources/call_flow/{id}/versions
Content-Type: application/json

Makes one saved Call Flow version active, selected by document version or version ID. Use it after updating a visual flow when that revision is ready to handle calls; updating the Call Flow saves a revision but does not replace this deployment step. Directly authored [SWML Scripts](/docs/apis/rest/swml-scripts/create-swml-script) do not use Call Flow versions.

#### Permissions

The API token used to authenticate must have the following scope(s) enabled to make a successful request: _Voice_, _Messaging_, _Fax_, or _Video_.

[Learn more about API scopes](/docs/platform/your-signalwire-api-space).

Reference: https://signalwire.com/docs/apis/rest/call-flows/deploy-call-flow-version

## Authentication

- `Authorization` header (basic auth, required) — SignalWire Basic Authentication using Project ID and API Token. The client sends HTTP requests with the Authorization header containing the word Basic followed by a space and a base64-encoded string of project_id:token. The project ID will be used as the username and the API token as the password. Example: ``` Authorization: Basic base64(project_id:token) ```

## Request

### Path parameters

- `id` (string, required) — The unique identifier of the Call Flow.

### Body (application/json)

This endpoint expects a CallFlowVersionDeployRequest.

- `CallFlowVersionDeployRequest`

## Response

### 201

The request has succeeded and a new resource has been created as a result.

- `id` (string, required) — The unique identifier of the deployed Call Flow Version.
- `created_at` (string, required) — The creation timestamp.
- `updated_at` (string, required) — The last update timestamp.
- `document_version` (integer, required) — The document version.
- `flow_data` (CallFlowVersionDeployResponseFlowData, optional) — Call Flow Builder state, stored as an opaque JSON object.
- `relayml` (CallFlowVersionDeployResponseRelayml, optional) — The calling SWML document deployed by this version. Uses [calling SWML methods](/docs/swml/reference/calling).

## Errors

### 401 Unauthorized Error

Access is unauthorized.

- `error` (enum, required)
  - Allowed values: `Unauthorized`

### 404 Not Found Error

The server cannot find the requested resource.

- `error` (enum, required)
  - Allowed values: `Not Found`

### 422 Unprocessable Entity Error

The request contains invalid parameters. See errors for details.

- `errors` (list of Types.StatusCodes.RestApiErrorItem, required) — List of validation errors.

### 500 Internal Server Error

An internal server error occurred.

- `error` (enum, required)
  - Allowed values: `Internal Server Error`

## Types

### CallFlowVersionDeployByDocumentVersion

- `document_version` (integer, required) — The current revision of the call flow.

### CallFlowVersionDeployByVersionId

- `call_flow_version_id` (string, required) — Any call flow version ID for this call flow.

### CallFlowVersionDeployResponseFlowData

Call Flow Builder state, stored as an opaque JSON object.

### CallFlowVersionDeployResponseRelayml

The calling SWML document deployed by this version. Uses [calling SWML methods](/docs/swml/reference/calling).

### Types.StatusCodes.RestApiErrorItem

Details about a specific error.

- `type` (string, required) — The category of error.
- `code` (string, required) — A specific error code.
- `message` (string, required) — A description of what caused the error.
- `url` (string, required) — A link to documentation about this error.
- `attribute` (string, optional, nullable) — The request parameter that caused the error, if applicable.

## Examples

**Request**

```json
{
  "document_version": 2
}
```

**Response**

```json
{
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "created_at": "2024-05-06T12:20:00Z",
  "updated_at": "2024-05-06T12:25:00Z",
  "document_version": 2,
  "flow_data": {},
  "relayml": {
    "sections": {
      "main": [
        {
          "play": {
            "url": "https://cdn.signalwire.com/swml/audio.mp3"
          }
        }
      ]
    },
    "version": "1.0.0"
  }
}
```

**SDK Code**

```python Deploy by document version
import requests

url = "https://{your_space_name}.signalwire.com/api/fabric/resources/call_flow/id/versions"

payload = { "document_version": 2 }
headers = {
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers, auth=("<project_id>", "<api_token>"))

print(response.json())
```

```javascript Deploy by document version
const url = 'https://{your_space_name}.signalwire.com/api/fabric/resources/call_flow/id/versions';
const credentials = btoa("<project_id>:<api_token>");

const options = {
  method: 'POST',
  headers: {
    Authorization: `Basic ${credentials}`,
    'Content-Type': 'application/json'
  },
  body: '{"document_version":2}'
};

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

```go Deploy by document version
package main

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

func main() {

	url := "https://{your_space_name}.signalwire.com/api/fabric/resources/call_flow/id/versions"

	payload := strings.NewReader("{\n  \"document_version\": 2\n}")

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

	req.SetBasicAuth("<project_id>", "<api_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 Deploy by document version
require 'uri'
require 'net/http'

url = URI("https://{your_space_name}.signalwire.com/api/fabric/resources/call_flow/id/versions")

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

request = Net::HTTP::Post.new(url)
request.basic_auth("<project_id>", "<api_token>")
request["Content-Type"] = 'application/json'
request.body = "{\n  \"document_version\": 2\n}"

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

```java Deploy by document version
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://{your_space_name}.signalwire.com/api/fabric/resources/call_flow/id/versions")
  .basicAuth("<project_id>", "<api_token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"document_version\": 2\n}")
  .asString();
```

```php Deploy by document version
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://{your_space_name}.signalwire.com/api/fabric/resources/call_flow/id/versions', [
  'body' => '{
  "document_version": 2
}',
  'headers' => [
    'Content-Type' => 'application/json',
  ],
    'auth' => ['<project_id>', '<api_token>'],
]);

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

```csharp Deploy by document version
using RestSharp;
using RestSharp.Authenticators;

var client = new RestClient("https://{your_space_name}.signalwire.com/api/fabric/resources/call_flow/id/versions");
client.Authenticator = new HttpBasicAuthenticator("<project_id>", "<api_token>");
var request = new RestRequest(Method.POST);

request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"document_version\": 2\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Deploy by document version
import Foundation

let credentials = Data("<project_id>:<api_token>".utf8).base64EncodedString()

let headers = [
  "Authorization": "Basic \(credentials)",
  "Content-Type": "application/json"
]
let parameters = ["document_version": 2] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://{your_space_name}.signalwire.com/api/fabric/resources/call_flow/id/versions")! 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()
```