Write

Manage A/B Variants

Manages A/B variants for a specific campaign step. Use action='list' to see variants, 'add' to create a new arm (label plus message_template, with limits split evenly), or 'remove' to retire an arm so enrolled leads fall back to the base template. Target the pre-send sequence or the post-acceptance follow-up step array. Fails if the campaign or step is not found.

manage_variantsDELETE/api/v1/campaigns/{campaign_id}/steps/{step_index}/variants/{variant_label}

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crispy — bash

Example prompt: Add variant B to step 0 of gtm-engineers-apr26 with a more casual opener

{
  "campaign_id": "gtm-engineers-apr26",
  "step_index": 0,
  "action": "add",
  "variants": ["A", "B"]
}

Permission scope

core

Access

Write

What you can build

Test two invite openers head-to-head on the same step

Add a fresh variant to an underperforming follow-up message

Retire a losing arm and route leads back to the base template

List all variants on a step to review your current experiment

Parameters

Inputs accepted by manage_variants.

Name	Type	Required	Description
campaign_id	`string`	required	Campaign slug (e.g. 'gtm-engineers-apr26').
action	`"list" \| "add" \| "remove"`	required	'list' returns all variants for the step; 'add' adds a new variant; 'remove' retires a variant arm (requires label).
step_index	`number`	required	0-based index of the sequence step to manage variants for. Required: matches REST path /campaigns/{campaign_id}/steps/{step_index}/variants.
label	`string`	optional	Required for action='add'. Short label for the variant (e.g. 'B').
message_template	`string`	optional	Required for action='add'. Message template text for this variant. Supports {first_name}, {company}, etc.
subject	`string`	optional	Optional for action='add'. Subject line for InMail steps.
target	`"sequence" \| "follow_up"`	optional	Which step array to target. 'sequence' (default) = pre-send. 'follow_up' = post-acceptance.

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