# Create a Number Group Membership

POST https://YOUR_SPACE.signalwire.com/api/relay/rest/number_groups/{NumberGroupId}/number_group_memberships
Content-Type: application/json

Adds a phone number to a number group.

#### Permissions

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

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

Reference: https://signalwire.com/docs/apis/relay-rest/number-group-membership/create-number-group-membership

## OpenAPI Specification

```yaml
openapi: 3.1.0
info:
  title: relay-rest
  version: 1.0.0
paths:
  /number_groups/{NumberGroupId}/number_group_memberships:
    post:
      operationId: create-number-group-membership
      summary: Create a Number Group Membership
      description: >-
        Adds a phone number to a number group.


        #### Permissions


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


        [Learn more about API scopes](/docs/platform/your-signalwire-api-space).
      tags:
        - subpackage_numberGroupMembership
      parameters:
        - name: NumberGroupId
          in: path
          description: Unique ID of the number group.
          required: true
          schema:
            $ref: '#/components/schemas/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:
        '200':
          description: The request has succeeded.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NumberGroupMembershipResponse'
        '401':
          description: Access is unauthorized.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Types.StatusCodes.StatusCode401'
        '404':
          description: The server cannot find the requested resource.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Types.StatusCodes.StatusCode404'
        '422':
          description: The request failed validation. See errors for details.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Types.StatusCodes.ValidationError'
        '500':
          description: An internal server error occurred.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Types.StatusCodes.StatusCode500'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AddNumberGroupMembershipRequest'
servers:
  - url: https://YOUR_SPACE.signalwire.com/api/relay/rest
components:
  schemas:
    uuid:
      type: string
      format: uuid
      description: Universal Unique Identifier.
      title: uuid
    AddNumberGroupMembershipRequest:
      type: object
      properties:
        phone_number_id:
          $ref: '#/components/schemas/uuid'
          description: The phone number ID to add to the group.
      required:
        - phone_number_id
      description: Request body for adding a phone number to a number group.
      title: AddNumberGroupMembershipRequest
    MembershipPhoneNumber:
      type: object
      properties:
        id:
          $ref: '#/components/schemas/uuid'
          description: The unique identifier of the phone number.
        name:
          type: string
          description: The name given to the phone number.
        number:
          type: string
          description: The phone number in E.164 format.
        capabilities:
          type: array
          items:
            type: string
          description: The capabilities of the phone number.
      description: Phone number representation within a membership.
      title: MembershipPhoneNumber
    NumberGroupMembershipResponse:
      type: object
      properties:
        id:
          $ref: '#/components/schemas/uuid'
          description: >-
            The unique identifier of the Number Group Membership on SignalWire.
            This can be used to delete the membership programmatically.
        number_group_id:
          $ref: '#/components/schemas/uuid'
          description: >-
            The unique identifier of the Number Group this membership is
            associated with.
        phone_number:
          $ref: '#/components/schemas/MembershipPhoneNumber'
          description: >-
            A representation of the phone number this membership is associated
            with.
        created_at:
          type: string
          description: The date and time when the membership was created.
        updated_at:
          type: string
          description: The date and time when the membership was last updated.
      required:
        - id
        - number_group_id
        - phone_number
        - created_at
        - updated_at
      description: Response containing a single number group membership.
      title: NumberGroupMembershipResponse
    TypesStatusCodesStatusCode401Error:
      type: string
      enum:
        - Unauthorized
      title: TypesStatusCodesStatusCode401Error
    Types.StatusCodes.StatusCode401:
      type: object
      properties:
        error:
          $ref: '#/components/schemas/TypesStatusCodesStatusCode401Error'
      required:
        - error
      description: Access is unauthorized.
      title: Types.StatusCodes.StatusCode401
    TypesStatusCodesStatusCode404Error:
      type: string
      enum:
        - Not Found
      title: TypesStatusCodesStatusCode404Error
    Types.StatusCodes.StatusCode404:
      type: object
      properties:
        error:
          $ref: '#/components/schemas/TypesStatusCodesStatusCode404Error'
      required:
        - error
      description: The server cannot find the requested resource.
      title: Types.StatusCodes.StatusCode404
    Types.StatusCodes.SpaceApiErrorItem:
      type: object
      properties:
        detail:
          type: string
          description: A description of what caused the error.
        status:
          type: string
          description: The HTTP status code.
        title:
          type: string
          description: A short summary of the error type.
        code:
          type: string
          description: The error code.
      required:
        - detail
        - status
        - title
        - code
      description: Details about a specific validation error.
      title: Types.StatusCodes.SpaceApiErrorItem
    Types.StatusCodes.ValidationError:
      type: object
      properties:
        errors:
          type: array
          items:
            $ref: '#/components/schemas/Types.StatusCodes.SpaceApiErrorItem'
          description: List of validation errors.
      required:
        - errors
      description: The request failed validation. See errors for details.
      title: Types.StatusCodes.ValidationError
    TypesStatusCodesStatusCode500Error:
      type: string
      enum:
        - Internal Server Error
      title: TypesStatusCodesStatusCode500Error
    Types.StatusCodes.StatusCode500:
      type: object
      properties:
        error:
          $ref: '#/components/schemas/TypesStatusCodesStatusCode500Error'
      required:
        - error
      description: An internal server error occurred.
      title: Types.StatusCodes.StatusCode500
  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/relay/rest/number_groups/NumberGroupId/number_group_memberships"

payload = { "phone_number_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6" }
headers = {
    "Authorization": "Basic <project_id>:<api_token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://your_space.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships';
const options = {
  method: 'POST',
  headers: {
    Authorization: 'Basic <project_id>:<api_token>',
    'Content-Type': 'application/json'
  },
  body: '{"phone_number_id":"3fa85f64-5717-4562-b3fc-2c963f66afa6"}'
};

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.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships"

	payload := strings.NewReader("{\n  \"phone_number_id\": \"3fa85f64-5717-4562-b3fc-2c963f66afa6\"\n}")

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

	req.Header.Add("Authorization", "Basic <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.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships")

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/json'
request.body = "{\n  \"phone_number_id\": \"3fa85f64-5717-4562-b3fc-2c963f66afa6\"\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.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships")
  .header("Authorization", "Basic <project_id>:<api_token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"phone_number_id\": \"3fa85f64-5717-4562-b3fc-2c963f66afa6\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://your_space.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships', [
  'body' => '{
  "phone_number_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
}',
  'headers' => [
    'Authorization' => 'Basic <project_id>:<api_token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://your_space.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Basic <project_id>:<api_token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"phone_number_id\": \"3fa85f64-5717-4562-b3fc-2c963f66afa6\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Basic <project_id>:<api_token>",
  "Content-Type": "application/json"
]
let parameters = ["phone_number_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6"] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://your_space.signalwire.com/api/relay/rest/number_groups/NumberGroupId/number_group_memberships")! 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()
```