# Create an Application

POST https://YOUR_SPACE.signalwire.com/api/laml/2010-04-01/Accounts/{AccountSid}/Applications
Content-Type: application/x-www-form-urlencoded

Create an Application.

#### Permissions

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

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

Reference: https://signalwire.com/docs/compatibility-api/rest/applications/create-application

## OpenAPI Specification

```yaml
openapi: 3.1.0
info:
  title: compatibility
  version: 1.0.0
paths:
  /Accounts/{AccountSid}/Applications:
    post:
      operationId: create-application
      summary: Create an Application
      description: >-
        Create an Application.


        #### Permissions


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


        [Learn more about API scopes](/docs/platform/your-signalwire-api-space).
      tags:
        - subpackage_applications
      parameters:
        - name: AccountSid
          in: path
          description: The Account ID that has the Application.
          required: true
          schema:
            type: string
            format: uuid
        - name: Authorization
          in: header
          description: >-
            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)

            ```
          required: true
          schema:
            type: string
      responses:
        '201':
          description: Response containing a newly created application.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Application'
        '400':
          description: >-
            The request was invalid or cannot be processed. Check the error
            details for more information.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CompatibilityErrorResponse'
        '401':
          description: Authentication failed. Please verify your credentials and try again.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CompatibilityErrorResponse'
        '422':
          description: >-
            The request could not be processed due to validation errors. Check
            the error details for more information.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CompatibilityErrorResponse'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateApplicationRequest'
servers:
  - url: https://YOUR_SPACE.signalwire.com/api/laml/2010-04-01
components:
  schemas:
    CreateApplicationRequestVoiceMethod:
      type: string
      enum:
        - GET
        - POST
      default: POST
      description: >-
        Whether the request to `VoiceUrl` is a `GET` or a `POST`. Default is
        `POST`.
      title: CreateApplicationRequestVoiceMethod
    CreateApplicationRequestVoiceFallbackMethod:
      type: string
      enum:
        - GET
        - POST
      default: POST
      description: >-
        Whether the request to `VoiceFallbackUrl` is a `GET` or a `POST`.
        Default is `POST`.
      title: CreateApplicationRequestVoiceFallbackMethod
    CreateApplicationRequestStatusCallbackMethod:
      type: string
      enum:
        - GET
        - POST
      default: POST
      description: >-
        Whether the request to the `StatusCallback` URL is a `GET` or a `POST`.
        Default is `POST`.
      title: CreateApplicationRequestStatusCallbackMethod
    CreateApplicationRequestSmsMethod:
      type: string
      enum:
        - GET
        - POST
      default: POST
      description: >-
        Whether the request to `SmsUrl` is a `GET` or a `POST`. Default is
        `POST`.
      title: CreateApplicationRequestSmsMethod
    CreateApplicationRequestSmsFallbackMethod:
      type: string
      enum:
        - GET
        - POST
      default: POST
      description: >-
        Whether the request to `SmsFallbackUrl` is a `GET` or a `POST`. Default
        is `POST`.
      title: CreateApplicationRequestSmsFallbackMethod
    CreateApplicationRequestSmsStatusCallbackMethod:
      type: string
      enum:
        - GET
        - POST
      default: POST
      description: >-
        Whether the request to `SmsStatusCallback` is a `GET` or a `POST`.
        Default is `POST`.
      title: CreateApplicationRequestSmsStatusCallbackMethod
    CreateApplicationRequest:
      type: object
      properties:
        FriendlyName:
          type: string
          description: A named unique identifier for the resource.
        VoiceUrl:
          type: string
          format: uri
          description: The URL to request when a phone number receives a call or fax.
        VoiceMethod:
          $ref: '#/components/schemas/CreateApplicationRequestVoiceMethod'
          description: >-
            Whether the request to `VoiceUrl` is a `GET` or a `POST`. Default is
            `POST`.
        VoiceFallbackUrl:
          type: string
          format: uri
          description: >-
            The URL SignalWire will request if errors occur when fetching the
            `VoiceUrl`.
        VoiceFallbackMethod:
          $ref: '#/components/schemas/CreateApplicationRequestVoiceFallbackMethod'
          description: >-
            Whether the request to `VoiceFallbackUrl` is a `GET` or a `POST`.
            Default is `POST`.
        StatusCallback:
          type: string
          format: uri
          description: The URL to pass status updates to the Application.
        StatusCallbackMethod:
          $ref: '#/components/schemas/CreateApplicationRequestStatusCallbackMethod'
          description: >-
            Whether the request to the `StatusCallback` URL is a `GET` or a
            `POST`. Default is `POST`.
        SmsUrl:
          type: string
          format: uri
          description: The URL to request when an SMS is received.
        SmsMethod:
          $ref: '#/components/schemas/CreateApplicationRequestSmsMethod'
          description: >-
            Whether the request to `SmsUrl` is a `GET` or a `POST`. Default is
            `POST`.
        SmsFallbackUrl:
          type: string
          format: uri
          description: >-
            The URL SignalWire will request if errors occur when fetching the
            `SmsUrl`.
        SmsFallbackMethod:
          $ref: '#/components/schemas/CreateApplicationRequestSmsFallbackMethod'
          description: >-
            Whether the request to `SmsFallbackUrl` is a `GET` or a `POST`.
            Default is `POST`.
        SmsStatusCallback:
          type: string
          format: uri
          description: >-
            The URL to receive status updates for messages sent via this
            Application.
        SmsStatusCallbackMethod:
          $ref: '#/components/schemas/CreateApplicationRequestSmsStatusCallbackMethod'
          description: >-
            Whether the request to `SmsStatusCallback` is a `GET` or a `POST`.
            Default is `POST`.
      required:
        - FriendlyName
      description: Request body for creating an application.
      title: CreateApplicationRequest
    Application:
      type: object
      properties:
        sid:
          type: string
          format: uuid
          description: The unique identifier for the Application.
        account_sid:
          type: string
          format: uuid
          description: The unique identifier for the Account that created this Application.
        api_version:
          type: string
          description: The version of the SignalWire API.
        date_created:
          type: string
          description: The date, in RFC 2822 GMT format, this Application was created.
        date_updated:
          type: string
          description: The date, in RFC 2822 GMT format, this Application was updated.
        friendly_name:
          type: string
          description: A named unique identifier for the resource.
        uri:
          type: string
          description: The URI for this Application.
        voice_url:
          type:
            - string
            - 'null'
          description: The URL to request when a phone number receives a call or fax.
        voice_method:
          type:
            - string
            - 'null'
          description: >-
            Whether the request to `VoiceUrl` is a `GET` or a `POST`. Default is
            `POST`.
        voice_fallback_url:
          type:
            - string
            - 'null'
          description: >-
            The URL SignalWire will request if errors occur when fetching the
            `VoiceUrl`.
        voice_fallback_method:
          type:
            - string
            - 'null'
          description: >-
            Whether the request to `VoiceFallbackUrl` is a `GET` or a `POST`.
            Default is `POST`.
        status_callback:
          type:
            - string
            - 'null'
          description: The URL to pass status updates to the Application.
        status_callback_method:
          type:
            - string
            - 'null'
          description: >-
            Whether the request to the `StatusCallback` URL is a `GET` or a
            `POST`. Default is `POST`.
        voice_caller_id_lookup:
          type:
            - boolean
            - 'null'
          description: >-
            Whether or not to look up a caller's ID from the database. Always
            null.
        sms_url:
          type:
            - string
            - 'null'
          description: The URL to request when an SMS is received.
        sms_method:
          type:
            - string
            - 'null'
          description: >-
            Whether the request to `SmsUrl` is a `GET` or a `POST`. Default is
            `POST`.
        sms_fallback_url:
          type:
            - string
            - 'null'
          description: >-
            The URL SignalWire will request if errors occur when fetching the
            `SmsUrl`.
        sms_fallback_method:
          type:
            - string
            - 'null'
          description: >-
            Whether the request to `SmsFallbackUrl` is a `GET` or a `POST`.
            Default is `POST`.
        sms_status_callback:
          type:
            - string
            - 'null'
          description: >-
            The URL to receive status updates for messages sent via this
            Application.
        sms_status_callback_method:
          type:
            - string
            - 'null'
          description: >-
            Whether the request to `SmsStatusCallback` is a `GET` or a `POST`.
            Default is `POST`.
        message_status_callback:
          type:
            - string
            - 'null'
          description: >-
            The URL to receive status updates for messages sent via this
            Application.
      required:
        - sid
        - account_sid
        - api_version
        - date_created
        - date_updated
        - friendly_name
        - uri
        - voice_url
        - voice_method
        - voice_fallback_url
        - voice_fallback_method
        - status_callback
        - status_callback_method
        - voice_caller_id_lookup
        - sms_url
        - sms_method
        - sms_fallback_url
        - sms_fallback_method
        - sms_status_callback
        - sms_status_callback_method
        - message_status_callback
      description: Application model representing a cXML application.
      title: Application
    CompatibilityErrorResponse:
      type: object
      properties:
        code:
          type: integer
          description: Error code.
        message:
          type: string
          description: Error message.
        more_info:
          type: string
          description: URL for more information about the error.
        status:
          type: integer
          description: HTTP status code.
      required:
        - code
        - message
        - more_info
        - status
      description: Error response model.
      title: CompatibilityErrorResponse
  securitySchemes:
    SignalWireBasicAuth:
      type: http
      scheme: basic
      description: >-
        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)

        ```

```

## SDK Code Examples

```python
import requests

url = "https://your_space.signalwire.com/api/laml/2010-04-01/Accounts/AccountSid/Applications"

payload = ""
headers = {
    "Authorization": "Basic <project_id>:<api_token>",
    "Content-Type": "application/x-www-form-urlencoded"
}

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

print(response.json())
```

```javascript
const url = 'https://your_space.signalwire.com/api/laml/2010-04-01/Accounts/AccountSid/Applications';
const options = {
  method: 'POST',
  headers: {
    Authorization: 'Basic <project_id>:<api_token>',
    'Content-Type': 'application/x-www-form-urlencoded'
  },
  body: new URLSearchParams('')
};

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"
	"net/http"
	"io"
)

func main() {

	url := "https://your_space.signalwire.com/api/laml/2010-04-01/Accounts/AccountSid/Applications"

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

	req.Header.Add("Authorization", "Basic <project_id>:<api_token>")
	req.Header.Add("Content-Type", "application/x-www-form-urlencoded")

	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.signalwire.com/api/laml/2010-04-01/Accounts/AccountSid/Applications")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Basic <project_id>:<api_token>'
request["Content-Type"] = 'application/x-www-form-urlencoded'

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.signalwire.com/api/laml/2010-04-01/Accounts/AccountSid/Applications")
  .header("Authorization", "Basic <project_id>:<api_token>")
  .header("Content-Type", "application/x-www-form-urlencoded")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://your_space.signalwire.com/api/laml/2010-04-01/Accounts/AccountSid/Applications', [
  'form_params' => null,
  'headers' => [
    'Authorization' => 'Basic <project_id>:<api_token>',
    'Content-Type' => 'application/x-www-form-urlencoded',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://your_space.signalwire.com/api/laml/2010-04-01/Accounts/AccountSid/Applications");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Basic <project_id>:<api_token>");
request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Basic <project_id>:<api_token>",
  "Content-Type": "application/x-www-form-urlencoded"
]

let request = NSMutableURLRequest(url: NSURL(string: "https://your_space.signalwire.com/api/laml/2010-04-01/Accounts/AccountSid/Applications")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers

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()
```