---
title: "Least Squares Solve"
method: POST
path: "/quantlib/numerical/linalg/lstsq"
tags: ["quantlib-numerical"]
---

# Least Squares Solve

`POST /quantlib/numerical/linalg/lstsq`

## Request

- Base URL: `https://api.fincept.in` (the document declares no server; this is the origin it was published from)
- URL: `https://api.fincept.in/quantlib/numerical/linalg/lstsq`
- Auth: API key in header `X-API-Key`

Solve least squares problem min ||Ax - b||

## Request body

- LstSqRequest
  - `A` array[], required
    - number[]
  - `b` number[], required

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/fincept/apis/fincept-api.md) · [All operations](https://skmtc.dev/fincept/apis/fincept-api/llms.txt) · [OpenAPI document](https://skmtc.dev/fincept/apis/fincept-api/revisions/e9c0076ea55a?raw)