---
title: "Create Feedback Formula Ep"
method: POST
path: "/api/v1/feedback/formulas"
tags: ["feedback"]
---

# Create Feedback Formula Ep

`POST /api/v1/feedback/formulas`

Create a new feedback formula

## Request body

- FeedbackFormulaCreate
  - `dataset_id` string, uuid, nullable
  - `session_id` string, uuid, nullable
  - `feedback_key` string, required
  - `aggregation_type` 'sum' | 'avg', required
  - `formula_parts` FeedbackFormulaWeightedVariable[], required
    - `part_type` 'weighted_key', required
    - `weight` number, required
    - `key` string, required

## Response `200`

Successful Response

- FeedbackFormula
  - `dataset_id` string, uuid, nullable
  - `session_id` string, uuid, nullable
  - `feedback_key` string, required
  - `aggregation_type` 'sum' | 'avg', required
  - `formula_parts` FeedbackFormulaWeightedVariable[], required
    - `part_type` 'weighted_key', required
    - `weight` number, required
    - `key` string, required
  - `id` string, uuid, required
  - `created_at` string, date-time, required
  - `modified_at` string, date-time, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/langchain-ai/apis/langsmith.md) · [All operations](https://skmtc.net/langchain-ai/apis/langsmith/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/langchain-ai/langsmith/revisions/a0acb3a6a101/schema)