> ## Documentation Index
> Fetch the complete documentation index at: https://developer.z-api.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Link groups

> Add groups to a community

## Overview

With this API you can add other groups to a community.

<Warning>
  It's not possible to link the same group to more than one community. If you submit 3 groups and 1 already belongs to another community, 2 will be added while the other returns an error indicating it's already part of another community.
</Warning>

***

## Attributes

### Header

<ParamField path="instanceId" type="string" required>
  Your instance ID. Available in the Z-API panel under **Instances**.
</ParamField>

<ParamField path="token" type="string" required>
  Your Z-API instance token.
</ParamField>

### Required

<ParamField body="communityId" type="string" required>
  Community ID
</ParamField>

<ParamField body="groupsPhones" type="array" required>
  Array with the IDs/Phones of the groups to be linked
</ParamField>

***

## Request Body

```json theme={"theme":{"light":"github-light","dark":"poimandres"}}
{
  "communityId": "98372465382764532938",
  "groupsPhones": ["1345353454354354-group", "1203634230225498-group"]
}
```

***

## Response

### 200

```json theme={"theme":{"light":"github-light","dark":"poimandres"}}
{
  "success": true
}
```

### 405

Make sure you are correctly sending the method specification, that is, verify that you sent POST or GET as specified at the beginning of this topic.

### 415

If you receive a 415 error, make sure to add the "Content-Type" header to your request, which in most cases is "application/json".