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

# Campaigns steps update

## PATCH /api/v1/public/campaigns/{id}/steps/{step_id}/

Updates a campaign step's properties including A/B testing variants.

Auth: `X-API-Key`

### Path Parameters

* `id` (integer, required): Campaign ID
* `step_id` (integer, required): Step ID

### Request Body

```json theme={null}
{
  "delay_in_hours": 48,
  "subject_line": "Updated subject line",
  "message_template": "Updated message template with {{first_name}} and {{company_name}}",
  "subject_line_b": "Alternative subject line",
  "message_template_b": "Alternative message template",
  "add_unsubscribe": false,
  "parent_step_id": 123,
  "child_step_id": 456
}
```

### Flow Management Fields

* `parent_step_id` (integer, optional): ID of the step that comes before this one
* `parent_condition_id` (integer, optional): ID of the condition that comes before this one
* `child_step_id` (integer, optional): ID of the step that comes after this one
* `child_condition_id` (integer, optional): ID of the condition that comes after this one

**Note:** You can only specify one parent (either `parent_step_id` OR `parent_condition_id`) and one child (either `child_step_id` OR `child_condition_id`).

### Available Variables

You can use these variables in message templates and subject lines with double brackets `{{}}`:

* `{{first_name}}` - Prospect's first name
* `{{last_name}}` - Prospect's last name
* `{{job_title}}` - Job title
* `{{company_name}}` - Company name
* `{{location}}` - Location

**A/B Testing:**

* `subject_line_b` - Alternative subject line for A/B testing
* `message_template_b` - Alternative message template for A/B testing

### Response

```json theme={null}
{
  "success": true,
  "step": {
    "id": 456,
    "step_type": "EMAIL",
    "subject_line": "Updated subject line",
    "message_template": "Updated message template with {{first_name}} and {{company_name}}",
    "subject_line_b": "Alternative subject line",
    "message_template_b": "Alternative message template",
    "delay_in_hours": 48,
    "add_unsubscribe": false,
    "created_at": "2024-01-15T10:30:00Z",
    "updated_at": "2024-01-15T11:45:00Z"
  },
  "campaign": {...}
}
```

### Example

```bash theme={null}
curl -X PATCH -H "X-API-Key: <key>" \
  -H "Content-Type: application/json" \
  -d '{
    "delay_in_hours": 48,
    "subject_line": "Updated subject line",
    "message_template": "Updated message template with {{first_name}} and {{company_name}}"
  }' \
  "https://api.seleqt.ai/api/v1/public/campaigns/123/steps/456/"
```