---
title: "Create Testset Variant"
method: POST
path: "/preview/testsets/variants/"
tags: ["Testsets"]
---

# Create Testset Variant

`POST /preview/testsets/variants/`

## Request body

- TestsetVariantCreateRequest
  - `testset_variant` TestsetVariantCreate, required
    - `testset_id` string, uuid, nullable
    - `artifact_id` string, uuid, nullable
    - `flags` TestsetFlags
      - `has_testcases` boolean, nullable
      - `has_traces` boolean, nullable
    - `tags` object, nullable
    - `meta` object, nullable
    - `name` string, nullable
    - `description` string, nullable
    - `slug` string, nullable

## Response `201`

Successful Response

- TestsetVariantResponse
  - `count` integer
  - `testset_variant` TestsetVariant
    - `testset_id` string, uuid, nullable
    - `artifact_id` string, uuid, nullable
    - `flags` TestsetFlags
      - `has_testcases` boolean, nullable
      - `has_traces` boolean, nullable
    - `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

- **2026-01-14** `53da4c9de2b7` — 1 breaking, 1 info
  - request property `testset_variant/tags/anyOf[subschema #1]/additionalProperties/` list-of-types was narrowed by removing types `integer, null and number` from media type `application/json`
  - response property `testset_variant/anyOf[subschema #1: TestsetVariant]/tags/anyOf[subschema #1]/additionalProperties/` list-of-types was narrowed by removing types `integer, null and number` from media type `application/json` of response `201`
- **2025-11-05** `e62506c24377` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/agenta-ai/apis/agenta-api/changes/preview/testsets/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.dev/agenta-ai/apis/agenta-api/revisions/53da4c9de2b7?raw)