---
title: "Checkout"
method: POST
path: "/billing/crypto/checkout"
tags: ["billing"]
---

# Checkout

`POST /billing/crypto/checkout`

## Request

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

Create a top-up order and return a payment address to send funds to. Credits are applied only once the network confirms the payment.

## Headers

- `authorization` string, nullable

## Request body

- Checkout
  - `key_id` integer, required
  - `usd` union, required
    - number
    - string
  - `pay_currency` string, required
  - `case` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/relayxapi/apis/relayx-x-data-api.md) · [All operations](https://skmtc.dev/relayxapi/apis/relayx-x-data-api/llms.txt) · [OpenAPI document](https://skmtc.dev/relayxapi/apis/relayx-x-data-api/revisions/6c9acb520594?raw)