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PUT
/
v1
/
checkouts
/
:id
curl -X PUT https://api.stateset.com/v1/checkouts/checkout_abc123 \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "items": [
      {
        "id": "item_123",
        "quantity": 3
      },
      {
        "id": "item_456",
        "quantity": 1
      }
    ],
    "fulfillment_address": {
      "name": "John Doe",
      "line_one": "456 Oak Ave",
      "city": "Los Angeles",
      "state": "CA",
      "country": "US",
      "postal_code": "90210"
    },
    "fulfillment_option_id": "shipping_fast"
  }'

{
  "id": "checkout_abc123",
  "buyer": {
    "first_name": "John",
    "last_name": "Doe",
    "email": "john.doe@example.com",
    "phone_number": "+1234567890"
  },
  "payment_provider": {
    "provider": "stripe",
    "supported_payment_methods": ["card"]
  },
  "status": "ready_for_payment",
  "currency": "usd",
  "line_items": [
    {
      "id": "item_123",
      "item": {
        "id": "item_123",
        "quantity": 3
      },
      "base_amount": 3000,
      "discount": 0,
      "total": 3000,
      "subtotal": 3000,
      "tax": 0
    },
    {
      "id": "item_456",
      "item": {
        "id": "item_456",
        "quantity": 1
      },
      "base_amount": 500,
      "discount": 0,
      "total": 500,
      "subtotal": 500,
      "tax": 0
    }
  ],
  "fulfillment_address": {
    "name": "John Doe",
    "line_one": "456 Oak Ave",
    "city": "Los Angeles",
    "state": "CA",
    "country": "US",
    "postal_code": "90210"
  },
  "fulfillment_options": [
    {
      "type": "shipping",
      "id": "shipping_fast",
      "title": "Express Shipping",
      "subtitle": "2-3 business days",
      "carrier": "Shipping Co",
      "subtotal": 150,
      "tax": 0,
      "total": 150
    }
  ],
  "fulfillment_option_id": "shipping_fast",
  "totals": [
    {
      "type": "subtotal",
      "display_text": "Subtotal",
      "amount": 3500
    },
    {
      "type": "fulfillment",
      "display_text": "Shipping",
      "amount": 150
    },
    {
      "type": "tax",
      "display_text": "Tax",
      "amount": 100
    },
    {
      "type": "total",
      "display_text": "Total",
      "amount": 3750
    }
  ],
  "messages": [],
  "links": []
}

Documentation Index

Fetch the complete documentation index at: https://docs.stateset.com/llms.txt

Use this file to discover all available pages before exploring further.

This endpoint updates an existing Checkout Session. You can modify line items, buyer information, shipping address, or select different fulfillment options. The response will include recalculated totals.

​
Authentication

This endpoint requires a valid API key with checkouts:write permissions. 
Authorization: Bearer YOUR_API_KEY

​
Path Parameters

​
id
string
required
Unique identifier for the checkout session

​
Request Body

​
items
array
Updated array of items to purchase
​
buyer
object
Updated buyer information
​
fulfillment_address
object
Updated fulfillment address
​
fulfillment_option_id
string
Identifier for the selected fulfillment option

​
Response

Returns the updated checkout session with recalculated totals. 
curl -X PUT https://api.stateset.com/v1/checkouts/checkout_abc123 \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "items": [
      {
        "id": "item_123",
        "quantity": 3
      },
      {
        "id": "item_456",
        "quantity": 1
      }
    ],
    "fulfillment_address": {
      "name": "John Doe",
      "line_one": "456 Oak Ave",
      "city": "Los Angeles",
      "state": "CA",
      "country": "US",
      "postal_code": "90210"
    },
    "fulfillment_option_id": "shipping_fast"
  }'

{
  "id": "checkout_abc123",
  "buyer": {
    "first_name": "John",
    "last_name": "Doe",
    "email": "john.doe@example.com",
    "phone_number": "+1234567890"
  },
  "payment_provider": {
    "provider": "stripe",
    "supported_payment_methods": ["card"]
  },
  "status": "ready_for_payment",
  "currency": "usd",
  "line_items": [
    {
      "id": "item_123",
      "item": {
        "id": "item_123",
        "quantity": 3
      },
      "base_amount": 3000,
      "discount": 0,
      "total": 3000,
      "subtotal": 3000,
      "tax": 0
    },
    {
      "id": "item_456",
      "item": {
        "id": "item_456",
        "quantity": 1
      },
      "base_amount": 500,
      "discount": 0,
      "total": 500,
      "subtotal": 500,
      "tax": 0
    }
  ],
  "fulfillment_address": {
    "name": "John Doe",
    "line_one": "456 Oak Ave",
    "city": "Los Angeles",
    "state": "CA",
    "country": "US",
    "postal_code": "90210"
  },
  "fulfillment_options": [
    {
      "type": "shipping",
      "id": "shipping_fast",
      "title": "Express Shipping",
      "subtitle": "2-3 business days",
      "carrier": "Shipping Co",
      "subtotal": 150,
      "tax": 0,
      "total": 150
    }
  ],
  "fulfillment_option_id": "shipping_fast",
  "totals": [
    {
      "type": "subtotal",
      "display_text": "Subtotal",
      "amount": 3500
    },
    {
      "type": "fulfillment",
      "display_text": "Shipping",
      "amount": 150
    },
    {
      "type": "tax",
      "display_text": "Tax",
      "amount": 100
    },
    {
      "type": "total",
      "display_text": "Total",
      "amount": 3750
    }
  ],
  "messages": [],
  "links": []
}