Checkout API

POST /v1/checkout-sessions

{
  "product_cart": [
    { "product_id": "prod_abc123", "quantity": 1 }
  ],
  "customer": {
    "email": "customer@example.com",
    "name": "Jane Doe"
  }
}

{
  "checkout_id": "chk_1M2N3o4P5q6R7s8T",
  "checkout_url": "https://checkout.bachs.io/c/Ht4qLp9NvZ3xKrB",
  "status": "open",
  "expires_at": "2026-01-24T15:30:00.000Z",
  "created_at": "2026-01-24T14:30:00.000Z"
}