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

Documentation Index

Fetch the complete documentation index at: https://docs.walead.ai/llms.txt

Use this file to discover all available pages before exploring further.

​
Overview

Updates a message variant’s content, enabled status, or ICP targeting configuration. This allows you to refine your messaging and A/B test different approaches.

​
Updatable Fields

​
body

The message template content. Supports WaLead variables and can be up to 8000 characters. Example: 
{
  "body": "Hi {{firstName}},\n\nI noticed you're working on {{companyName}}'s growth..."
}

​
isDisabled

Whether this variant should be used in the rotation. Disabled variants are skipped when assigning messages to leads. Example: 
{
  "isDisabled": true
}
You cannot disable the last enabled variant in a step. At least one variant must remain active.

​
icpDefinitionRaw

ICP (Ideal Customer Profile) definition that determines which leads receive this variant. Allows for sophisticated targeting based on lead attributes. Example: 
{
  "icpDefinitionRaw": "C-level executives at companies with 50-200 employees in the SaaS industry"
}

​
Template Variables

The message body supports these variable types: Core Variables (from the lead profile):
  • {{firstName}}, {{lastName}}, {{name}}
  • {{companyName}}, {{headline}}, {{website}}
  • {{email}}, {{phone}}
Custom Variables (defined per lead):
  • Any custom fields you’ve added to your leads
  • Example: {{industry}}, {{location}}, {{painPoint}}

​
Character Limit

The body field has a maximum length of 8000 characters to ensure deliverability and comply with LinkedIn’s message limits.

​
A/B Testing Strategy

When updating variants for A/B testing:
  1. Let each variant run for at least 100 leads before analyzing results
  2. Only change one element at a time (message hook, CTA, length, etc.)
  3. Use the campaign analytics to compare variant performance

​
Response

Returns the updated array of all variants for the step, allowing you to see the changes in context.

​
Use Cases

  • Refine message copy based on response rates
  • Temporarily disable underperforming variants
  • Apply different messages to different ICP segments
  • Update personalization variables as you gather more lead data

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

​
variantId
string
required

Variant ID

Body

application/json

Variant update data

​
body
string

Message template body

Maximum string length: 8000
​
isDisabled
boolean

Whether this variant is disabled

​
icpDefinitionRaw
string

ICP (Ideal Customer Profile) definition for targeting

Response

Variant updated successfully

​
success
boolean
​
message
string
​
variants
object[]