---
title: "Preview a subscription change"
method: POST
path: "/api/billing/preview-subscribe"
tags: ["billing"]
---

# Preview a subscription change

`POST /api/billing/preview-subscribe`

[cloud-only] Returns a preview of what a subscription change would cost, including prorations.

## Request body

- object
  - `plan_id` string, required — ID of the plan to preview

## Response `200`

Subscription preview

- SubscriptionPreview — [cloud-only] Preview of a subscription change including prorations.
  - `plan_id` string
  - `plan_name` string
  - `amount_due` integer — Amount due in cents
  - `proration_amount` integer — Proration adjustment in cents
  - `currency` string
  - `next_billing_date` string, date-time

## Other responses

- `400` — Bad request
- `401` — Unauthorized

## Changes

- **2026-05-08** `c9640fded659` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/comfy-org/apis/comfyui-api/changes/api/billing/preview-subscribe/post.md)

---

[API](https://skmtc.dev/comfy-org/apis/comfyui-api.md) · [All operations](https://skmtc.dev/comfy-org/apis/comfyui-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/comfy-org/comfyui-api/revisions/c9640fded659/schema)