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

# Create Testset Variant

`POST /testsets/variants/`

## Request body

- TestsetVariantCreateRequest
  - `testset_variant` TestsetVariantCreate, required
    - `testset_id` string, uuid, nullable
    - `artifact_id` string, uuid, nullable
    - `flags` TestsetFlags — Placeholder for testset-level flags. This model is intentionally empty but kept as a dedicated type so that: - existing references to `flags: Optional[TestsetFlags]` remain valid, and - structured flags can be added here in the future without breaking the surrounding DTOs.
    - `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 — Placeholder for testset-level flags. This model is intentionally empty but kept as a dedicated type so that: - existing references to `flags: Optional[TestsetFlags]` remain valid, and - structured flags can be added here in the future without breaking the surrounding DTOs.
    - `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

- **2026-02-27** `8fcd55a5a656` — 1 info
  - endpoint added
- **2025-06-27** `e3e84db47198` — 1 breaking
  - api path removed without deprecation

[Change history](https://skmtc.dev/agenta-ai/apis/agenta-api/changes/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-service-production.skmtc.workers.dev/v1/apis/agenta-ai/agenta-api/revisions/8fcd55a5a656/schema)