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# Assign Resource to WhatsApp number

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

Assigns an existing Resource as a WhatsApp number's calling or messaging handler, so every inbound call or message to the number runs that Resource. Find the number's ID with [List WhatsApp numbers](/docs/apis/rest/whatsapp/list-whatsapp-numbers). A number that already has an Address for the chosen channel is re-pointed at the new Resource; an Address it holds for the other channel is removed, because a WhatsApp number holds one Address at a time. Calling also requires voice to be enabled on the number, as described in [Enable voice on a WhatsApp number](/docs/platform/voice/whatsapp/enable-voice).

#### 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/whatsapp-routes/assign-resource-whatsapp-number

## 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 Resource.

### Body (application/json)

This endpoint expects an object.

- `whatsapp_number_id` (string, required) — The SignalWire ID of the WhatsApp number, as returned by [List WhatsApp numbers](/docs/apis/rest/whatsapp/list-whatsapp-numbers).
- `handler` (enum, required) — Whether the Resource handles the number's `calling` or `messaging` traffic.
  - Allowed values: `calling`, `messaging`

## Response

### 201

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

- `object or object or object`
  - Application Address
    - `id` (string, required) — Unique ID of the Fabric Address.
    - `name` (string, required) — Name of the Fabric Address.
    - `display_name` (string, required) — Display name of the Fabric Address.
    - `cover_url` (string, required) — Cover url of the Fabric Address.
    - `preview_url` (string, required) — Preview url of the Fabric Address.
    - `locked` (boolean, required) — Locks the Fabric Address. This is used to prevent the Fabric Address from accepting calls.
    - `channels` (object or object or object, required) — Channels of the Fabric Address.
      - AudioChannel
        - `audio` (string, required) — Audio Channel of Fabric Address
      - MessagingChannel
        - `messaging` (string, required) — Messaging Channel of Fabric Address
      - VideoChannel
        - `video` (string, required) — Video Channel of Fabric Address
    - `created_at` (datetime, required) — Fabric Address Creation Date.
    - `type` (enum, required) — The display type of a fabric address pointing to an application.
      - Allowed values: `app`
  - Room Address
    - `id` (string, required) — Unique ID of the Fabric Address.
    - `name` (string, required) — Name of the Fabric Address.
    - `display_name` (string, required) — Display name of the Fabric Address.
    - `cover_url` (string, required) — Cover url of the Fabric Address.
    - `preview_url` (string, required) — Preview url of the Fabric Address.
    - `locked` (boolean, required) — Locks the Fabric Address. This is used to prevent the Fabric Address from accepting calls.
    - `channels` (object or object or object, required) — Channels of the Fabric Address.
      - AudioChannel
        - `audio` (string, required) — Audio Channel of Fabric Address
      - MessagingChannel
        - `messaging` (string, required) — Messaging Channel of Fabric Address
      - VideoChannel
        - `video` (string, required) — Video Channel of Fabric Address
    - `created_at` (datetime, required) — Fabric Address Creation Date.
    - `type` (enum, required) — The display type of a fabric address pointing to a Conference Room.
      - Allowed values: `room`
  - Call Address
    - `id` (string, required) — Unique ID of the Fabric Address.
    - `name` (string, required) — Name of the Fabric Address.
    - `display_name` (string, required) — Display name of the Fabric Address.
    - `cover_url` (string, required) — Cover url of the Fabric Address.
    - `preview_url` (string, required) — Preview url of the Fabric Address.
    - `locked` (boolean, required) — Locks the Fabric Address. This is used to prevent the Fabric Address from accepting calls.
    - `channels` (object or object or object, required) — Channels of the Fabric Address.
      - AudioChannel
        - `audio` (string, required) — Audio Channel of Fabric Address
      - MessagingChannel
        - `messaging` (string, required) — Messaging Channel of Fabric Address
      - VideoChannel
        - `video` (string, required) — Video Channel of Fabric Address
    - `created_at` (datetime, required) — Fabric Address Creation Date.
    - `type` (enum, required) — The display type of a fabric address pointing to call.
      - Allowed values: `call`

## 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 object, required) — List of validation errors.
  - `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.

### 500 Internal Server Error

An internal server error occurred.

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

## Examples

**Request**

```json
{
  "whatsapp_number_id": "691af061-cd86-4893-a605-173f47afc4c2",
  "handler": "calling"
}
```

**Response**

```json
{
  "channels": {
    "audio": "/external/resource_name?channel=audio"
  },
  "cover_url": "https://coverurl.com",
  "created_at": "2024-05-06T12:20:00Z",
  "display_name": "Justice League",
  "id": "691af061-cd86-4893-a605-173f47afc4c2",
  "locked": true,
  "name": "justice-league",
  "preview_url": "https://previewurl.com",
  "type": "app"
}
```

**SDK Code**

```python
import requests

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

payload = {
    "whatsapp_number_id": "691af061-cd86-4893-a605-173f47afc4c2",
    "handler": "calling"
}
headers = {
    "Content-Type": "application/json"
}

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

print(response.json())
```

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

const options = {
  method: 'POST',
  headers: {
    Authorization: `Basic ${credentials}`,
    'Content-Type': 'application/json'
  },
  body: '{"whatsapp_number_id":"691af061-cd86-4893-a605-173f47afc4c2","handler":"calling"}'
};

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://{your_space_name}.signalwire.com/api/fabric/resources/id/whatsapp_numbers"

	payload := strings.NewReader("{\n  \"whatsapp_number_id\": \"691af061-cd86-4893-a605-173f47afc4c2\",\n  \"handler\": \"calling\"\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
require 'uri'
require 'net/http'

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

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  \"whatsapp_number_id\": \"691af061-cd86-4893-a605-173f47afc4c2\",\n  \"handler\": \"calling\"\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("https://{your_space_name}.signalwire.com/api/fabric/resources/id/whatsapp_numbers")
  .basicAuth("<project_id>", "<api_token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"whatsapp_number_id\": \"691af061-cd86-4893-a605-173f47afc4c2\",\n  \"handler\": \"calling\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://{your_space_name}.signalwire.com/api/fabric/resources/id/whatsapp_numbers', [
  'body' => '{
  "whatsapp_number_id": "691af061-cd86-4893-a605-173f47afc4c2",
  "handler": "calling"
}',
  'headers' => [
    'Content-Type' => 'application/json',
  ],
    'auth' => ['<project_id>', '<api_token>'],
]);

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

```csharp
using RestSharp;
using RestSharp.Authenticators;

var client = new RestClient("https://{your_space_name}.signalwire.com/api/fabric/resources/id/whatsapp_numbers");
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  \"whatsapp_number_id\": \"691af061-cd86-4893-a605-173f47afc4c2\",\n  \"handler\": \"calling\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

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

let headers = [
  "Authorization": "Basic \(credentials)",
  "Content-Type": "application/json"
]
let parameters = [
  "whatsapp_number_id": "691af061-cd86-4893-a605-173f47afc4c2",
  "handler": "calling"
] 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/id/whatsapp_numbers")! 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()
```