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POST
/
v1
/
campaigns
/
{id}
/
steps
/
{stepId}
/
variants
Add Variant to Step
curl --request POST \
  --url https://app-api.walead.ai/api/v1/campaigns/{id}/steps/{stepId}/variants \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "body": "<string>"
}
'
{
  "success": true,
  "message": "<string>",
  "variants": [
    {
      "id": "<string>",
      "body": "<string>",
      "order": 123,
      "isDisabled": true,
      "icpDefinitionRaw": "<string>",
      "stepId": "<string>",
      "aiTools": [
        {
          "name": "<string>",
          "key": "<string>"
        }
      ]
    }
  ]
}

​
Overview

Adds a new message variant to a step, enabling A/B testing of different message approaches. Variants are only applicable to message and screener type steps.

​
What are Variants?

Variants are different versions of the same message that WaLead rotates through to test which performs better. Each variant:
  • Has its own message template
  • Can be enabled or disabled independently
  • Can have custom ICP (Ideal Customer Profile) targeting
  • Includes AI tool configurations for personalization

​
Request Body

The request body is optional. You can create an empty variant and update it later: 
{
  "body": "Hi {{firstName}}, I noticed you work at {{companyName}}..."
}
Or create without a body (empty variant): 
{}

​
Variant Rotation

WaLead automatically rotates through enabled variants to distribute tests evenly:
  • Each lead is assigned a variant based on the order
  • Disabled variants are skipped
  • Performance metrics are tracked per variant

​
Use Cases

​
A/B Testing Different Approaches

// Variant 1: Direct value proposition
{
  "body": "Hi {{firstName}}, I help companies like {{companyName}} reduce costs by 30%..."
}

// Variant 2: Question-based approach
{
  "body": "Hi {{firstName}}, are you looking for ways to optimize your team's workflow?"
}

// Variant 3: Social proof
{
  "body": "Hi {{firstName}}, we've helped 100+ companies in your industry..."
}

​
ICP-Specific Messages

Use the icpDefinitionRaw field (via update variant) to target specific lead profiles with different messages.

​
Response

Returns the complete array of variants for the step, including the newly created one with its assigned ID and order.

​
Next Steps

After creating a variant:
  1. Update its message body if you created it empty
  2. Configure ICP targeting if needed
  3. Ensure at least one variant remains enabled

Authorizations

​
x-api-key
string
header
required

API key for authentication. Generate from your WaLead dashboard.

Path Parameters

​
id
string
required

Campaign ID

​
stepId
string
required

Step ID

Body

application/json

Variant content (optional)

​
body
string

Message template body

Response

Variant added successfully

​
success
boolean
​
message
string
​
variants
object[]