***

title: add_membership
slug: /reference/python/rest/number-groups/add-membership
description: Add a phone number to a group.
max-toc-depth: 3
---------------------

For a complete index of all SignalWire documentation pages, fetch https://signalwire.com/docs/llms.txt

Add a phone number to a group.

<EndpointSchemaSnippet endpoint="POST /api/relay/rest/number_groups/{NumberGroupId}/number_group_memberships" />

## **Response Example**

<EndpointResponseSnippet endpoint="POST /api/relay/rest/number_groups/{NumberGroupId}/number_group_memberships" />

## **Example**

```python {9}
from signalwire.rest import RestClient

client = RestClient(
    project="your-project-id",
    token="your-api-token",
    host="your-space.signalwire.com",
)

membership = client.number_groups.add_membership(
    "group-id",
    phone_number_id="phone-number-id",
)
print("Membership ID:", membership.get("id"))
```