{
  "operationId": "createPaymentSession",
  "method": "POST",
  "path": "/agent/checkout-session",
  "responses": {
    "200": [
      {
        "name": "default",
        "value": {
          "intent": "session",
          "session_id": "as_3f9c1b2e-7d64-4a8e-9c0f-5b2d1e8a7c33",
          "method": [
            "stripe",
            "card"
          ],
          "amount": 38.42,
          "currency": "USD",
          "service": "USPS Ground Advantage",
          "handoff_url": "https://smklog.com/assets/calculator?product=Yamaha+FG800+acoustic+guitar+in+a+hard+case&from_postal_code=07102&to_postal_code=30303&agent_session=as_3f9c1b2e-7d64-4a8e-9c0f-5b2d1e8a7c33",
          "identified_product_title": "Yamaha FG800 acoustic guitar in a hard case",
          "quote_reused": true,
          "note": "Live quote at this moment, not a hold. The human confirms the shipping consents and pays on the checkout page. Keep session_id: get_checkout_status reports when the human has paid and when the label exists."
        }
      }
    ],
    "400": [
      {
        "name": "default",
        "value": {
          "error": "invalid_request",
          "message": "JSON object body required."
        }
      }
    ],
    "422": [
      {
        "name": "default",
        "value": {
          "error": "session_failed",
          "message": "This shipment is past parcel limits; SMKlog sells parcel labels only."
        }
      }
    ],
    "429": [
      {
        "name": "default",
        "value": {
          "error": "rate_limited",
          "message": "Too many Smart Quote API requests from this client. Try again later."
        }
      }
    ]
  }
}