---
title: "Change Plan"
method: POST
path: "/v1/auth/upgrade"
tags: ["Authentication & API Keys"]
deprecated: true
---

# Change Plan

`POST /v1/auth/upgrade`

## Request

- Base URL: `https://api.vectelos.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.vectelos.com/v1/auth/upgrade`
- Auth: none declared

> **Deprecated.**

Retained only for downgrading to FREE. Paid tiers are granted exclusively by
the Stripe webhook after a completed Checkout — POST /v1/billing/checkout.

## Headers

- `authorization` string, nullable: Bearer <JWT session token>

## Cookies

- `vx_session` string, nullable

## Request body

- PlanChangeRequest
  - `plan` string, required: Only FREE is accepted here — paid plans go through Stripe Checkout.

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/vectelos/apis/vectelos-api.md) · [All operations](https://skmtc.dev/vectelos/apis/vectelos-api/llms.txt) · [OpenAPI document](https://skmtc.dev/vectelos/apis/vectelos-api/revisions/8e68c96f24fa?raw)