> ## Documentation Index
> Fetch the complete documentation index at: https://docs.leadlex.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Add Tags to Contact

> Add tags to a contact (merges with existing tags, no duplicates)

## Request

### Path Parameters

<ParamField path="id" type="string" required>
  Contact ID (UUID)
</ParamField>

### Body Parameters

<ParamField body="tags" type="array" required>
  Array of tag strings to add
</ParamField>

### Headers

```
Authorization: Bearer wbk_your_api_key_here
Content-Type: application/json
```

## Response

<ResponseField name="data" type="object">
  <Expandable title="properties">
    <ResponseField name="contact_id" type="string">Contact ID</ResponseField>
    <ResponseField name="tags" type="array">Updated full list of tags</ResponseField>
  </Expandable>
</ResponseField>

<CodeGroup>
  ```bash cURL theme={null}
  curl -X POST https://data.leadlex.com/functions/v1/api-gateway/v1/contacts/123e4567-e89b-12d3-a456-426614174000/tags \
    -H "Authorization: Bearer wbk_your_api_key_here" \
    -H "Content-Type: application/json" \
    -d '{ "tags": ["vip", "legal"] }'
  ```

  ```python Python theme={null}
  import requests

  API_KEY = "wbk_your_api_key_here"
  BASE_URL = "https://data.leadlex.com/functions/v1/api-gateway"

  headers = {"Authorization": f"Bearer {API_KEY}", "Content-Type": "application/json"}
  response = requests.post(
      f"{BASE_URL}/v1/contacts/123e4567-e89b-12d3-a456-426614174000/tags",
      headers=headers,
      json={"tags": ["vip", "legal"]}
  )
  print(response.json())
  ```

  ```javascript JavaScript theme={null}
  const response = await fetch(
    'https://data.leadlex.com/functions/v1/api-gateway/v1/contacts/123e4567-e89b-12d3-a456-426614174000/tags',
    {
      method: 'POST',
      headers: {
        'Authorization': 'Bearer wbk_your_api_key_here',
        'Content-Type': 'application/json'
      },
      body: JSON.stringify({ tags: ['vip', 'legal'] })
    }
  );
  const { data } = await response.json();
  ```
</CodeGroup>

### Example Response

```json theme={null}
{
  "data": {
    "contact_id": "123e4567-e89b-12d3-a456-426614174000",
    "tags": ["existing-tag", "vip", "legal"]
  }
}
```

## Errors

| Status | Code                       | Description                         |
| ------ | -------------------------- | ----------------------------------- |
| 400    | `validation_error`         | Missing or invalid `tags` array     |
| 404    | `not_found`                | Contact not found                   |
| 403    | `insufficient_permissions` | Missing `contacts:write` permission |