---
title: "Create Application Variant"
method: POST
path: "/applications/variants/"
tags: ["Applications"]
---

# Create Application Variant

`POST /applications/variants/`

Create a new variant on an existing application.

A variant is an independent branch of the application's history. The
new variant starts empty — call `POST /applications/revisions/commit`
to add its first revision. Use `POST /applications/variants/fork` when
you want the new variant to inherit an existing revision history.

## Request body

- ApplicationVariantCreateRequest — Request body for creating a variant on an existing application.
  - `application_variant` ApplicationVariantCreate, required
    - `application_id` string, uuid, nullable
    - `workflow_id` string, uuid, nullable
    - `artifact_id` string, uuid, nullable
    - `flags` ApplicationFlags — Legacy full application flag set.
      - `is_application` boolean
      - `is_evaluator` boolean
      - `is_snippet` boolean
      - `is_managed` boolean
      - `is_custom` boolean
      - `is_llm` boolean
      - `is_hook` boolean
      - `is_code` boolean
      - `is_match` boolean
      - `is_feedback` boolean
      - `is_chat` boolean
      - `has_url` boolean
      - `has_script` boolean
      - `has_handler` boolean
    - `tags` object, nullable
    - `meta` object, nullable
    - `name` string, nullable
    - `description` string, nullable
    - `slug` string, nullable

## Response `200`

Successful Response

- ApplicationVariantResponse — Single-variant response envelope.
  - `count` integer — `1` when a variant was found, `0` otherwise.
  - `application_variant` ApplicationVariant
    - `application_slug` string, nullable
    - `workflow_slug` string, nullable
    - `application_id` string, uuid, nullable
    - `workflow_id` string, uuid, nullable
    - `artifact_slug` string, nullable
    - `artifact_id` string, uuid, nullable
    - `flags` ApplicationVariantFlags
      - `is_application` boolean
      - `is_evaluator` boolean
      - `is_snippet` boolean
    - `tags` object, nullable
    - `meta` object, nullable
    - `name` string, nullable
    - `description` string, nullable
    - `created_at` string, date-time, nullable
    - `updated_at` string, date-time, nullable
    - `deleted_at` string, date-time, nullable
    - `created_by_id` string, uuid, nullable
    - `updated_by_id` string, uuid, nullable
    - `deleted_by_id` string, uuid, nullable
    - `slug` string, nullable
    - `id` string, uuid, nullable

## Other responses

- `422` — Validation Error

## Changes

- **2026-05-23** `2040366204e5` — 3 info
  - added the optional property `application_variant/anyOf[subschema #1: ApplicationVariant]/application_slug` to the response with the `200` status
  - added the optional property `application_variant/anyOf[subschema #1: ApplicationVariant]/artifact_slug` to the response with the `200` status
  - added the optional property `application_variant/anyOf[subschema #1: ApplicationVariant]/workflow_slug` to the response with the `200` status
- **2026-05-22** `67e2a3c6952d` — 3 warning
  - removed the optional property `application_variant/anyOf[subschema #1: ApplicationVariant]/application_slug` from the response with the `200` status
  - removed the optional property `application_variant/anyOf[subschema #1: ApplicationVariant]/artifact_slug` from the response with the `200` status
  - removed the optional property `application_variant/anyOf[subschema #1: ApplicationVariant]/workflow_slug` from the response with the `200` status
- **2026-05-22** `ca3686e05842` — 3 info
  - added the optional property `application_variant/anyOf[subschema #1: ApplicationVariant]/application_slug` to the response with the `200` status
  - added the optional property `application_variant/anyOf[subschema #1: ApplicationVariant]/artifact_slug` to the response with the `200` status
  - added the optional property `application_variant/anyOf[subschema #1: ApplicationVariant]/workflow_slug` to the response with the `200` status
- …earlier changes not shown

[Full history](https://skmtc.dev/agenta-ai/apis/agenta-api/changes/applications/variants/post.md)

---

[API](https://skmtc.dev/agenta-ai/apis/agenta-api.md) · [All operations](https://skmtc.dev/agenta-ai/apis/agenta-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/agenta-ai/agenta-api/revisions/06e03dbce2be/schema)