---
title: "Add Five Why"
method: POST
path: "/api/psp/five-why"
tags: ["psp"]
---

# Add Five Why

`POST /api/psp/five-why`

## Request

- Base URL: `https://www.ucai.net` (the document declares no server; this is the origin it was published from)
- URL: `https://www.ucai.net/api/psp/five-why`
- Auth: none declared

## Request body

- FiveWhyRequest
  - `code` string, required
  - `source_category` string, required
  - `whys` object[], required
  - `root_cause` string, required
  - `reverse_validated` boolean
  - `starts_at` 'point_of_impact' | 'level_2_pareto', nullable

## Response `200`

Successful Response

- object

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/ucai/apis/abs-core.md) · [All operations](https://skmtc.dev/ucai/apis/abs-core/llms.txt) · [OpenAPI document](https://skmtc.dev/ucai/apis/abs-core/revisions/1502a61b5620?raw)