---
title: "Billing Subscription Change Preview"
method: GET
path: "/api/billing/subscription/change-preview"
---

# Billing Subscription Change Preview

`GET /api/billing/subscription/change-preview`

## Request

- Base URL: `https://api.animgen.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.animgen.com/api/billing/subscription/change-preview`
- Auth: none declared

## Query parameters

- `targetPlanCode` string, required

## Response `200`

Successful Response

- BillingSubscriptionChangePreviewOut
  - `quoteId` string, required
  - `quoteExpiresAt` string, required
  - `ruleVersion` string, required
  - `creditsToAdd` integer, required
  - `nextBillingDate` string, nullable
  - `changeType` 'upgrade' | 'downgrade', required
  - `applyMode` 'immediate' | 'next_period', required
  - `currentPlanCode` string, required
  - `targetPlanCode` string, required
  - `immediateChargeAmountMinor` integer
  - `immediateChargeCurrency` string, nullable
  - `settlementAmountMinor` integer
  - `settlementCurrency` string, nullable
  - `effectiveAt` string, nullable

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/animgen/apis/aianimgenbackend.md) · [All operations](https://skmtc.dev/animgen/apis/aianimgenbackend/llms.txt) · [OpenAPI document](https://skmtc.dev/animgen/apis/aianimgenbackend/revisions/ac3744fbb14e?raw)