---
title: "Create subscription checkout"
method: POST
path: "/subscribe"
tags: ["Subscribe"]
---

# Create subscription checkout

`POST /subscribe`

Create a subscription checkout or billing-management URL only after the user confirms. The request never completes payment by itself.

## Request body

- object
  - `tier` 'starter' | 'pro' | 'business' — Subscription tier to pre-select.

## Response `200`

Billing URL

- object
  - `url` string, uri, required
  - `status` 'checkout_created' | 'already_subscribed' | 'payment_issue', required
  - `message` string, required

## Other responses

- `401` — Unauthenticated
- `429` — Xquik tier rate limit exceeded. The response includes a `Retry-After` header with the number of seconds to wait before retrying.

## Changes

- **2026-08-12** `d8082b3892a2` — 24 warning
  - added the new `invalid_complete_replies_request` enum value to the `allOf[#/components/schemas/Error]/error/oneOf[subschema #1: LegacyErrorCode]/` response property for the response status `429`
  - added the new `invalid_complete_replies_request` enum value to the `allOf[#/components/schemas/Error]/error/oneOf[subschema #2: StructuredError]/code` response property for the response status `429`
  - added the new `invalid_complete_replies_request` enum value to the `error/oneOf[subschema #1: LegacyErrorCode]/` response property for the response status `401`
  - added the new `invalid_complete_replies_request` enum value to the `error/oneOf[subschema #2: StructuredError]/code` response property for the response status `401`
  - …20 more
- …earlier changes not shown

[Full history](https://skmtc.dev/xquik-dev/apis/xquik-api/changes/subscribe/post.md)

---

[API](https://skmtc.dev/xquik-dev/apis/xquik-api.md) · [All operations](https://skmtc.dev/xquik-dev/apis/xquik-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/xquik-dev/xquik-api/revisions/d8082b3892a2/schema)