---
title: "Change Plan Handler"
method: POST
path: "/payments/change-plan"
---

# Change Plan Handler

`POST /payments/change-plan`

## Headers

- `x-api-key` string

## Cookies

- `lmnt-auth0` string, nullable

## Request body

- ChangePlanRequest
  - `price_id` string, required

## Response `200`

Successful Response

- ChangePlanResponse
  - `kind` 'upgraded' | 'downgrade_scheduled', required
  - `effective_at` integer, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/lmnt/apis/yapster.md) · [All operations](https://skmtc.net/lmnt/apis/yapster/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/lmnt/yapster/revisions/f153248e1350/schema)