---
title: "Create billing checkout"
method: POST
path: "/v1/billing/checkout"
tags: ["Accounts"]
---

# Create billing checkout

`POST /v1/billing/checkout`

Creates a hosted checkout session for plan activation or balance top-up.

## Request body

- BillingCheckoutRequest — Subscription or top-up checkout payload accepted by the billing API.
  - `target_plan` 'unpaid' | 'plus' | 'pro' | 'max' | 'null', nullable — Target monthly plan for subscription checkout.
  - `top_up_usd_cents` integer, nullable — One-time USD top-up amount in cents.
  - `reason` string, required

## Response `200`

Billing checkout created.

- BillingCheckoutResponse — Billing checkout or portal response.
  - `checkout` BillingCheckout, required — Hosted Stripe checkout or billing portal session.
    - `url` string, uri, required
    - `reason` string, required

## Other responses

- `400` — Bad request.
- `401` — Unauthorized.
- `429` — Too many requests.
- `500` — Internal server error.

## Changes

- **2026-07-02** `024ff3141fd7` — 4 breaking, 3 info
  - the request property `reason` became not nullable
  - the request property `reason` became required
  - removed the required property `checkout/expiresAt` from the response with the `200` status
  - removed the required property `ok` from the response with the `200` status
  - …3 more
- **2026-06-05** `3985c6090c91` — 18 breaking, 6 warning, 77 info
  - the `reason` request property's maxLength was decreased to `200`
  - the response property `checkout_url` became nullable for the status `400`
  - the response property `checkout_url` became nullable for the status `401`
  - the response property `checkout_url` became nullable for the status `429`
  - …97 more

[Change history](https://skmtc.dev/tovuk/apis/tovuk-api/changes/v1/billing/checkout/post.md)

---

[API](https://skmtc.dev/tovuk/apis/tovuk-api.md) · [All operations](https://skmtc.dev/tovuk/apis/tovuk-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/tovuk/tovuk-api/revisions/ef06c3a9c42b/schema)