---
title: "Create experiment items"
method: POST
path: "/v1/private/experiments/items"
tags: ["Experiments"]
---

# Create experiment items

`POST /v1/private/experiments/items`

Create experiment items

## Request body

- ExperimentItemsBatch
  - `experiment_items` ExperimentItem[], required
    - `id` string, uuid
    - `experiment_id` string, uuid, required
    - `dataset_item_id` string, uuid, required
    - `trace_id` string, uuid, required
    - `project_id` string, uuid
    - `project_name` string
    - `input` JsonListString
    - `output` JsonListString
    - `trace_metadata` JsonListString
    - `feedback_scores` FeedbackScore[]
      - `name` string, required
      - `category_name` string
      - `value` number, required
      - `reason` string
      - `source` 'ui' | 'sdk' | 'online_scoring', required
      - `source_queue_id` string, uuid
      - `created_at` string, date-time
      - `last_updated_at` string, date-time
      - `created_by` string
      - `last_updated_by` string
      - `value_by_author` object
    - `comments` Comment[]
      - `id` string, uuid
      - `text` string, required
      - `source_queue_id` string, uuid
      - `created_at` string, date-time
      - `last_updated_at` string, date-time
      - `created_by` string
      - `last_updated_by` string
    - `total_estimated_cost` number
    - `duration` number, double
    - `usage` object
    - `created_at` string, date-time
    - `last_updated_at` string, date-time
    - `created_by` string
    - `last_updated_by` string
    - `trace_visibility_mode` 'default' | 'hidden'
    - `description` string
    - `execution_policy` ExecutionPolicy
      - `runs_per_item` integer
      - `pass_threshold` integer
    - `assertion_results` AssertionResult[]
      - `value` string
      - `passed` boolean
      - `reason` string
    - `status` 'passed' | 'failed'

## Response `204`

No content

---

[API](https://skmtc.net/comet-ml/apis/opik-rest-api.md) · [All operations](https://skmtc.net/comet-ml/apis/opik-rest-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/comet-ml/opik-rest-api/versions/4ed2fbc97cc3/schema)