Order lifecycle (post-purchase)

After checkout is completed and an order is placed, you must push status updates to Google using the order webhook.

• Endpoint: https://shoppingdataintegration.googleapis.com/v1/webhooks/partners/[PARTNER_ID]/events/order?key=[API_KEY]
  • Google will share your PARTNER_ID and API_KEY with you.
• You can provide the API key in one of two ways:
  • As a URL query parameter: ?key=[API_KEY]
  • Using the HTTP header: X-Goog-Api-Key: [API_KEY]

• For more details on how to use API keys, see Using API keys

• Payload: You must send the full order entity, for all updates.

1. Auth and request signing

Refer to the version you selected for your implementation.

Version January 23 2026

You can do symmetric key signing using HMAC key shared by Google with you.

OR you can refer to following instructions for asymmetric signature:

1. Select a key from the signing_keys array in UCP profile.
2. Create a detached JWT (RFC 7797) over the request body using the selected key.
3. Include the JWT in the Request-Signature header.
4. Include the key ID in the JWT header's kid claim to allow the receiver to identify which key to use for verification.

Version April 8 2026

Key changes in this version include the introduction of new mandatory webhook headers and specific request signing procedures.

1.1. Required webhook headers

The following HTTP headers are mandatory for all webhook requests:

• Webhook-Id: A unique identifier for this specific webhook event. This ID should match the id of the primary event being sent (e.g., the fulfillment event ID or adjustment event ID).
• Webhook-Timestamp: The timestamp indicating when the event occurred.

These headers replace the id and created_time fields previously expected in the order payload.

1.2. Request signing

1. Compute SHA-256 digest of the raw request body and set Content-Digest header.
2. Select a signing key from signing_keys in your UCP profile.
3. Build signature base per RFC 9421.
   • See the spec for signed components
4. Set UCP-Agent, Signature-Input, and Signature headers.
   • UCP-Agent is a link to your UCP profile in the format profile="https://merchant.example.com/.well-known/ucp".
   • Signature-Input is a dictionary structured field describing the components contained within the signature, as well as the keyid used to sign, which must match the kid of your selected signing key from signing_keys in your UCP profile.
   • Signature header contains your signature base which is signed using your private key and then base64 encoded.

See the signing instructions on ucp.dev

for more information.

2. Mandatory order update events

The following order event updates are required for the integration:

• Order created
• Order shipped
• Order delivered

Important: A shipped event followed by a delivered event are both required. If your integration cannot provide these events, notify your Google point of contact to ensure webhook updates are handled appropriately.

Reasons an order update will be rejected

The following conditions cause an update to be rejected:

• Request body does not contain an order
• Missing checkout_id
• Missing id in the request body - this must match the order confirmation ID
• An order timestamp that is older than the latest update
  • Version 2026-04-08: Timestamp evaluated with the Webhook-Timestamp header
  • Version 2026-01-23: Timestamp evaluated using the created_time property
• An adjustment is ignored if the type is not one of: refund, return, credit, price_adjustment, dispute, or cancellation

Note: Ensure that any shipping descriptions provided in your payloads don't exceed 200 characters.

2.1. Order created event

• Trigger: Immediately after the order is confirmed (status: processing).

Line item requirements

• Line items must not be empty, and must include item product information.
• A line item's status must accurately reflect the total and fulfilled quantities (where fulfilled represents delivered items), per the UCP spec:
  • processing: when fulfilled is 0 and total > 0 (for example, total: 2, fulfilled: 0).
  • partial: when fulfilled is greater than 0 but less than total (for example, total: 2, fulfilled: 1).
  • fulfilled: when fulfilled equals total and total > 0 (for example, total: 2, fulfilled: 2).
  • removed: when total is 0 (for example, total: 0, fulfilled: 0).

Example: This example shows an order created after a buyer completes the checkout.

Version 2026-04-08

Key changes in this version in this example:

• The currency field is now required at the top level of the Order object.
• The type field within each object in the totals array is now an open string (e.g., \"subtotal\", \"tax\", \"fee\", \"total\").
• The mandatory Webhook-Id header contains a unique identifier for the webhook event. Note that the id field in the payload containing the order confirmation ID is still required.
• The mandatory Webhook-Timestamp header provides the creation time, replacing the former created_time field in the payload.

Required Headers:

• Webhook-Id: order_01
• Webhook-Timestamp: 2026-03-23T19:00:00Z

{
  "ucp": {
    "version": "2026-04-08",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-04-08"}]
    }
  },
  "id": "order_01",
  "checkout_id": "checkout_01",
  "currency": "USD",
   // Always include all line items, even for single-item checkouts. This ensures any add-ons, gifts, or separate charges are accounted for.
  "line_items": [
    {
      "id": "line_1",
      "item":
        {
          "id": "product_123",
          "title": "Running Shoes",
          "price": 10000
        },
      "quantity": { "total": 1, "fulfilled": 0 },
      "totals": [
        {"type": "subtotal", "display_text": null, "amount": 10000},
        {"type": "total", "display_text": null, "amount": 10000}
      ],
      // The status of a line item must match total and fulfilled quantities (e.g., total 1, fulfilled 0 -> status: processing).
      "status": "processing"
    }
  ],
  "totals": [
    {"type": "subtotal", "display_text": "Subtotal", "amount": 10000},
    {"type": "fee", "display_text": "Service Fee", "amount": 100},
    {"type": "tax", "display_text": "Tax", "amount": 800},
    {"type": "total", "display_text": "Total", "amount": 10900}
  ],
  "fulfillment": {
    "expectations": [
      {
        "id": "exp_1",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "method_type": "shipping",
        "destination": {
          "first_name": "Alice",
          "last_name": "Example",
          "street_address": "123 Main St",
          "address_locality": "Austin",
          "address_region": "TX",
          "address_country": "US",
          "postal_code": "78701"
        },
        "description": "Arrives in 2-3 business days",  // Maximum length: 200 characters.
        "fulfillable_on": "now"
      }
    ]
  },
  "permalink_url": "https://merchant.example.com/orders/789"
}

Version 2026-01-23

{
  "ucp": {
    "version": "2026-01-23",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-01-23"}]
    }
  },
  "id": "order_01",
  "checkout_id": "checkout_01",
  "created_time": "2026-03-23T19:00:00Z",
   // Always include all line items, even for single-item checkouts. This ensures any add-ons, gifts, or separate charges are accounted for.
  "line_items": [
    {
      "id": "line_1",
      "item":
        {
          "id": "product_123",
          "title": "Running Shoes",
          "price": 10000
        },
      "quantity": { "total": 1, "fulfilled": 0 },
      "totals": [
        {"type": "subtotal", "amount": 10000},
        {"type": "total", "amount": 10000}
      ],
      // The status of a line item must match total and fulfilled quantities (e.g., total 1, fulfilled 0 -> status: processing).
      "status": "processing"
    }
  ],
     "totals": [
     {"type": "subtotal", "amount": 10000},
     {"type": "total", "amount": 10000}
   ],
  "fulfillment": {
    "expectations": [
      {
        "id": "exp_1",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "method_type": "shipping",
        "destination": {
          "first_name": "Alice",
          "last_name": "Example",
          "street_address": "123 Main St",
          "address_locality": "Austin",
          "address_region": "TX",
          "address_country": "US",
          "postal_code": "78701"
        },
        "description": "Arrives in 2-3 business days", // Maximum length: 200 characters.
        "fulfillable_on": "now"
      }
    ]
  },
  "permalink_url": "https://merchant.example.com/orders/789"
}

Version 2026-01-23

{
  "ucp": {
    "version": "2026-01-23",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-01-23"}]
    }
  },
  "id": "order_01",
  "checkout_id": "checkout_01",
  "created_time": "2026-03-23T19:00:00Z",
   // Full line items must be included
  "line_items": [
    {
      "id": "line_1",
      "item":
        {
          "id": "product_123",
          "title": "Running Shoes",
          "price": 10000
        },
      "quantity": { "total": 1, "fulfilled": 0 },
      "totals": [
        {"type": "subtotal", "amount": 10000},
        {"type": "total", "amount": 10000}
      ],
      // The status of a line item must match total and fulfilled quantities (e.g., total 1, fulfilled 0 -> status: processing).
      "status": "processing"
    }
  ],
     "totals": [
     {"type": "subtotal", "amount": 10000},
     {"type": "total", "amount": 10000}
   ],
  "fulfillment": {
    "expectations": [
      {
        "id": "exp_1",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "method_type": "shipping",
        "destination": {
          "first_name": "Alice",
          "last_name": "Example",
          "street_address": "123 Main St",
          "address_locality": "Austin",
          "address_region": "TX",
          "address_country": "US",
          "postal_code": "78701"
        },
        "description": "Arrives in 2-3 business days",
        "fulfillable_on": "now"
      }
    ]
  },
  "permalink_url": "https://merchant.example.com/orders/789"
}

2.2. Fulfillment events

These events are sent as part of the fulfillment.events array.

Note: When fulfillment events occur, the expectations object must be kept consistent with any updates. For example, if the events indicate that the order comprises two packages, expectations should also reflect this. Expectations don't need to be updated for adjustments (for example, cancellations).

Order shipped

When items in the order have been shipped. The tracking_number and tracking_url fields are required for shipped events, as these are required to group items on the "My orders" page accurately.

Order delivered

When items in the order have been delivered.

Example (shipped and delivered): This example shows an order update after the item has been shipped and then delivered.

Version 2026-04-08

Required Headers:

• Webhook-Id: fulfill_evt_2
• Webhook-Timestamp: 2026-02-10T14:00:00Z

{
  "ucp": {
    "version": "2026-04-08",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-04-08"}]
    }
  },
  "id": "order_01",
  "checkout_id": "checkout_01",
  "currency": "USD",
  "line_items": [
    {
      "id": "line_1",
      "item":
        {
          "id": "product_123",
          "title": "Running Shoes",
          "price": 10000
        },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "amount": 10000},
        {"type": "total", "amount": 10000}
      ],
      "status": "fulfilled"
    }
  ],
   "totals": [
     {"type": "subtotal", "amount": 10000},
     {"type": "total", "amount": 10000}
   ],
  // Updated fulfillment details
  "fulfillment": {
    "events": [
      {
        "id": "fulfill_evt_1",
        "occurred_at": "2026-02-08T10:30:00Z",
        "type": "shipped",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "tracking_number": "123456789",
        "tracking_url": "https://fedex.com/track/123456789",
        "carrier": "FedEx",
        "description": "Shipping departed from warehouse"
      },
      {
        "id": "fulfill_evt_2",
        "occurred_at": "2026-02-10T14:00:00Z",
        "type": "delivered",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "tracking_number": "123456789",
        "tracking_url": "https://fedex.com/track/123456789",
        "carrier": "FedEx",
        "description": "Package delivered"
      }
    ],
    "expectations": [{ "...": "..." }]
  },
  "permalink_url": "https://merchant.example.com/orders/123"
}

Version 2026-01-23

{
  "ucp": {
    "version": "2026-01-23",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-01-23"}]
    }
  },
  "id": "order_01",
  "checkout_id": "checkout_01",
  "created_time": "2026-03-23T19:00:00Z",
  "line_items": [
    {
      "id": "line_1",
      "item":
        {
          "id": "product_123",
          "title": "Running Shoes",
          "price": 10000
        },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "amount": 10000},
        {"type": "total", "amount": 10000}
      ],
      "status": "fulfilled"
    }
  ],
   "totals": [
     {"type": "subtotal", "amount": 10000},
     {"type": "total", "amount": 10000}
   ],
  // Updated fulfillment details
  "fulfillment": {
    "events": [
      {
        "id": "fulfill_evt_1",
        "occurred_at": "2026-02-08T10:30:00Z",
        "type": "shipped",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "tracking_number": "123456789",
        "tracking_url": "https://fedex.com/track/123456789",
        "carrier": "FedEx",
        "description": "Shipping departed from warehouse"
      },
      {
        "id": "fulfill_evt_2",
        "occurred_at": "2026-02-10T14:00:00Z",
        "type": "delivered",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "tracking_number": "123456789",
        "tracking_url": "https://fedex.com/track/123456789",
        "carrier": "FedEx",
        "description": "Package delivered"
      }
    ],
    "expectations": [{ "...": "..." }]
  },
  "permalink_url": "https://merchant.example.com/orders/123"
}

2.3 Multi-item orders

The following sections explain how multi-item orders and packages are grouped and tracked.

Multi-item package grouping

Items on the "My orders" page are grouped by packages (that have the same tracking_url). If a package is partially returned, the returned items are split out to a separate section on the "My orders" page.

Package status

The statuses shown for the package are one of the following: Ordered, Shipped, Delivered, Returned, Refunded, Canceled. Package statuses are derived from the type attribute of the fulfillment events and adjustments objects.

How package status is determined

If there is an adjustment event with status: completed, then the package will display the appropriate status of Returned, Refunded, or Cancelled, based on the adjustment event type.

Adjustment Event properties	Package status
type: return, status: completed	Returned
type: refund, status: completed	Refunded
type: cancellation, status: completed	Cancelled

If there is no completed adjustment, then the status will be based on the fulfillment event type:

Fulfillment Event properties	Package status
type: shipped	Shipped (Expected by <date>)
type: delivered	Delivered
No fulfillment event	Ordered

Example (Multi-item order, same package delivery): This example shows an order update for a single package containing multiple items. All line items are grouped within a single shipped event sharing the same tracking number.

Version 2026-04-08

Required Headers:

• Webhook-Id: fulfill_evt_1
• Webhook-Timestamp: 2026-02-08T10:30:00Z

{
  "ucp": {
    "version": "2026-04-08",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-04-08"}]
    }
  },
  "id": "order_multi_01",
  "checkout_id": "checkout_multi_01",
  "currency": "USD",
  "line_items": [
    {
      "id": "line_1",
      "item": { "id": "product_1", "title": "Item 1", "price": 5000 },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "display_text": null, "amount": 5000},
        {"type": "total", "display_text": null, "amount": 5000}
      ],
      "status": "fulfilled"
    },
    {
      "id": "line_2",
      "item": { "id": "product_2", "title": "Item 2", "price": 5000 },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "display_text": null, "amount": 5000},
        {"type": "total", "display_text": null, "amount": 5000}
      ],
      "status": "fulfilled"
    }
  ],
  "totals": [
    {"type": "subtotal", "display_text": "Subtotal", "amount": 10000},
    {"type": "fee", "display_text": "Shipping", "amount": 500},
    {"type": "total", "display_text": "Total", "amount": 10500}
  ],
  "fulfillment": {
    "expectations": [
      {
        "id": "exp_1",
        "line_items": [
          { "id": "line_1", "quantity": 1 },
          { "id": "line_2", "quantity": 1 }
        ],
        "method_type": "shipping",
        "destination": {
          "first_name": "Alice",
          "last_name": "Example",
          "street_address": "123 Main St",
          "address_locality": "Austin",
          "address_region": "TX",
          "address_country": "US",
          "postal_code": "78701"
        },
        "description": "Standard Shipping",
        "fulfillable_on": "now"
      }
    ],
    "events": [
      {
        "id": "fulfill_evt_1",
        "occurred_at": "2026-02-08T10:30:00Z",
        "type": "shipped",
        "line_items": [
          { "id": "line_1", "quantity": 1 },
          { "id": "line_2", "quantity": 1 }
        ],
        "tracking_number": "123456789",
        "tracking_url": "https://fedex.com/track/123456789",
        "carrier": "FedEx",
        "description": "Both items shipped together"
      }
    ]
  },
  "permalink_url": "https://merchant.example.com/orders/456"
}

Version 2026-01-23

{
  "ucp": {
    "version": "2026-01-23",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-01-23"}]
    }
  },
  "id": "order_multi_01",
  "checkout_id": "checkout_multi_01",
  "created_time": "2026-02-07T09:00:00Z",
  "line_items": [
    {
      "id": "line_1",
      "item": { "id": "product_1", "title": "Item 1", "price": 5000 },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "amount": 5000},
        {"type": "total", "amount": 5000}
      ],
      "status": "fulfilled"
    },
    {
      "id": "line_2",
      "item": { "id": "product_2", "title": "Item 2", "price": 5000 },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "amount": 5000},
        {"type": "total", "amount": 5000}
      ],
      "status": "fulfilled"
    }
  ],
  "totals": [
    {"type": "subtotal", "amount": 10000},
    {"type": "fee", "amount": 500},
    {"type": "total", "amount": 10500}
  ],
  "fulfillment": {
    "expectations": [
      {
        "id": "exp_1",
        "line_items": [
          { "id": "line_1", "quantity": 1 },
          { "id": "line_2", "quantity": 1 }
        ],
        "method_type": "shipping",
        "destination": {
          "first_name": "Alice",
          "last_name": "Example",
          "street_address": "123 Main St",
          "address_locality": "Austin",
          "address_region": "TX",
          "address_country": "US",
          "postal_code": "78701"
        },
        "description": "Standard Shipping",
        "fulfillable_on": "now"
      }
    ],
    "events": [
      {
        "id": "fulfill_evt_1",
        "occurred_at": "2026-02-08T10:30:00Z",
        "type": "shipped",
        "line_items": [
          { "id": "line_1", "quantity": 1 },
          { "id": "line_2", "quantity": 1 }
        ],
        "tracking_number": "123456789",
        "tracking_url": "https://fedex.com/track/123456789",
        "carrier": "FedEx",
        "description": "Both items shipped together"
      }
    ]
  },
  "permalink_url": "https://merchant.example.com/orders/456"
}

Example (Multi-item order, multiple packages - Split Shipment): This example shows an order update for split shipments. There are multiple shipped events, each referencing the specific line_items within that respective package, with distinct tracking numbers. Since each package represents a distinct fulfillment commitment (e.g., different speeds and costs from a multi-group checkout), the expectations are also split.

Version 2026-04-08

Required Headers:

• Webhook-Id: fulfill_evt_2
• Webhook-Timestamp: 2026-02-09T14:00:00Z

{
  "ucp": {
    "version": "2026-04-08",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-04-08"}]
    }
  },
  "id": "order_multi_02",
  "checkout_id": "checkout_multi_02",
  "currency": "USD",
  "line_items": [
    {
      "id": "line_1",
      "item": { "id": "product_1", "title": "Item 1", "price": 5000 },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "display_text": null, "amount": 5000},
        {"type": "total", "display_text": null, "amount": 5000}
      ],
      "status": "fulfilled"
    },
    {
      "id": "line_2",
      "item": { "id": "product_2", "title": "Item 2", "price": 5000 },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "display_text": null, "amount": 5000},
        {"type": "total", "display_text": null, "amount": 5000}
      ],
      "status": "fulfilled"
    }
  ],
  "totals": [
    {"type": "subtotal", "display_text": "Subtotal", "amount": 10000},
    {"type": "fee", "display_text": "Shipping", "amount": 1500},
    {"type": "total", "display_text": "Total", "amount": 11500}
  ],
  "fulfillment": {
    "expectations": [
      {
        "id": "exp_1",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "method_type": "shipping",
        "destination": {
          "first_name": "Alice",
          "last_name": "Example",
          "street_address": "123 Main St",
          "address_locality": "Austin",
          "address_region": "TX",
          "address_country": "US",
          "postal_code": "78701"
        },
        "description": "Standard Shipping",
        "fulfillable_on": "now"
      },
      {
        "id": "exp_2",
        "line_items": [{ "id": "line_2", "quantity": 1 }],
        "method_type": "shipping",
        "destination": {
          "first_name": "Alice",
          "last_name": "Example",
          "street_address": "123 Main St",
          "address_locality": "Austin",
          "address_region": "TX",
          "address_country": "US",
          "postal_code": "78701"
        },
        "description": "Express Shipping",
        "fulfillable_on": "now"
      }
    ],
    "events": [
      {
        "id": "fulfill_evt_1",
        "occurred_at": "2026-02-08T10:30:00Z",
        "type": "shipped",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "tracking_number": "PKG1_TRACKING",
        "tracking_url": "https://fedex.com/track/PKG1_TRACKING",
        "carrier": "FedEx",
        "description": "First item shipped in package 1"
      },
      {
        "id": "fulfill_evt_2",
        "occurred_at": "2026-02-09T14:00:00Z",
        "type": "shipped",
        "line_items": [{ "id": "line_2", "quantity": 1 }],
        "tracking_number": "PKG2_TRACKING",
        "tracking_url": "https://fedex.com/track/PKG2_TRACKING",
        "carrier": "FedEx",
        "description": "Second item shipped in package 2"
      }
    ]
  },
  "permalink_url": "https://merchant.example.com/orders/457"
}

Version 2026-01-23

{
  "ucp": {
    "version": "2026-01-23",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-01-23"}]
    }
  },
  "id": "order_multi_02",
  "checkout_id": "checkout_multi_02",
  "created_time": "2026-02-07T09:00:00Z",
  "line_items": [
    {
      "id": "line_1",
      "item": { "id": "product_1", "title": "Item 1", "price": 5000 },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "amount": 5000},
        {"type": "total", "amount": 5000}
      ],
      "status": "fulfilled"
    },
    {
      "id": "line_2",
      "item": { "id": "product_2", "title": "Item 2", "price": 5000 },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "amount": 5000},
        {"type": "total", "amount": 5000}
      ],
      "status": "fulfilled"
    }
  ],
  "totals": [
    {"type": "subtotal", "amount": 10000},
    {"type": "fee", "amount": 1500},
    {"type": "total", "amount": 11500}
  ],
  "fulfillment": {
    "expectations": [
      {
        "id": "exp_1",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "method_type": "shipping",
        "destination": {
          "first_name": "Alice",
          "last_name": "Example",
          "street_address": "123 Main St",
          "address_locality": "Austin",
          "address_region": "TX",
          "address_country": "US",
          "postal_code": "78701"
        },
        "description": "Standard Shipping",
        "fulfillable_on": "now"
      },
      {
        "id": "exp_2",
        "line_items": [{ "id": "line_2", "quantity": 1 }],
        "method_type": "shipping",
        "destination": {
          "first_name": "Alice",
          "last_name": "Example",
          "street_address": "123 Main St",
          "address_locality": "Austin",
          "address_region": "TX",
          "address_country": "US",
          "postal_code": "78701"
        },
        "description": "Express Shipping",
        "fulfillable_on": "now"
      }
    ],
    "events": [
      {
        "id": "fulfill_evt_1",
        "occurred_at": "2026-02-08T10:30:00Z",
        "type": "shipped",
        "line_items": [{ "id": "line_1", "quantity": 1 }],
        "tracking_number": "PKG1_TRACKING",
        "tracking_url": "https://fedex.com/track/PKG1_TRACKING",
        "carrier": "FedEx",
        "description": "First item shipped in package 1"
      },
      {
        "id": "fulfill_evt_2",
        "occurred_at": "2026-02-09T14:00:00Z",
        "type": "shipped",
        "line_items": [{ "id": "line_2", "quantity": 1 }],
        "tracking_number": "PKG2_TRACKING",
        "tracking_url": "https://fedex.com/track/PKG2_TRACKING",
        "carrier": "FedEx",
        "description": "Second item shipped in package 2"
      }
    ]
  },
  "permalink_url": "https://merchant.example.com/orders/457"
}

2.4. Adjustment events

Any events involving money movement should be sent as part of the adjustments array.

• cancellation: When an entire order or specific items within an order are cancelled.
• return: When items in the order are returned by the customer.
• refund: When a refund is issued for an order or specific items.

Example (cancellation & refund): This example shows an order where the item was cancelled and refunded shortly after the order was placed.

Version 2026-04-08

Key changes in this version in this example:

• Line items affected by a cancellation now use "status": "removed" in the main line_items array.
• When line_items.status is removed:
  • The line_items.quantity.total is set to 0.
  • The original quantity is stored in the new line_items.quantity.original field.

Required Headers:

• Webhook-Id: adj_refund_1
• Webhook-Timestamp: 2026-02-09T11:05:00Z

{
  "ucp": {
    "version": "2026-04-08",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-04-08"}]
    }
  },
  "id": "order_02",
  "checkout_id": "checkout_02",
  "currency": "USD",
  "line_items": [
    {
      "id": "line_2",
      "item": {
        "id": "product_456",
        "title": "Smart Watch",
        "price": 29900
      },
      "quantity": {
        "total": 0,  // Item removed from order total.
        "original": 1,  // Original quantity before removal.
        "fulfilled": 0 //  Item was not fulfilled before cancellation.
      },
      "totals": [
        {"type": "subtotal", "amount": 29900},
        {"type": "tax", "amount": 2400},
        {"type": "total", "amount": 32300}
      ],
      "status": "removed" // Item is cancelled, returned, or refunded.
    }
  ],
  "totals": [
    {"type": "subtotal", "amount": 29900},
    {"type": "tax", "amount": 2400},
    {"type": "total", "amount": 32300}
  ],
    // Fulfillment expectations should still be present even if cancelled early.
  "fulfillment": {
    "expectations": [
      {
        "id": "exp_1",
        "line_items": [{ "id": "line_2", "quantity": 1 }],
        "method_type": "shipping",
        "destination": {
          "first_name": "Bob",
          "last_name": "Consumer",
          "street_address": "456 Oak Ave",
          "address_locality": "Anytown",
          "address_region": "CA",
          "address_country": "US",
          "postal_code": "90210"
        },
        "description": "Standard Shipping",
        "fulfillable_on": "now"
      }
    ]
    // "events": [] // No fulfillment events occurred before cancellation.
    },
  "adjustments": [
    {
      "id": "adj_cancel_1",
      "type": "cancellation",
      "description": "Customer changed mind",
      "line_items": [{ "id": "line_2", "quantity": 1 }],
      "occurred_at": "2026-02-09T11:00:00Z",
      "status": "completed"
    },
    {
      "id": "adj_refund_1",
      "type": "refund",
      "description": "Refund for cancelled item",
      "line_items": [{ "id": "line_2", "quantity": 1 }],
      "totals": [
        {"type": "subtotal", "amount": -29900},  // Negative amounts indicate money returned to the buyer.
        {"type": "tax", "amount": -2400},
        {"type": "total", "amount": -32300}
      ],
      "occurred_at": "2026-02-09T11:05:00Z",
      "status": "completed"
    }
  ],
  "permalink_url": "https://merchant.example.com/orders/12345"
}

Version 2026-01-23

{
  "ucp": {
    "version": "2026-01-23",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-01-23"}]
    }
  },
  "id": "order_02",
  "checkout_id": "checkout_02",
  "created_time": "2026-03-23T19:00:00Z",
  "line_items": [
    {
      "id": "line_2",
      "item": {
        "id": "product_456",
        "title": "Smart Watch",
        "price": 29900
      },
      "quantity": { "total": 1, "fulfilled": 0 },
      "totals": [
        {"type": "subtotal", "amount": 29900},
        {"type": "tax", "amount": 2400},
        {"type": "total", "amount": 32300}
      ],
      "status": "processing"
    }
  ],
  "totals": [
    {"type": "subtotal", "amount": 29900},
    {"type": "tax", "amount": 2400},
    {"type": "total", "amount": 32300}
  ],
  "adjustments": [
    {
      "id": "adj_cancel_1",
      "type": "cancellation",
      "description": "Customer changed mind",
      "line_items": [{ "id": "line_2", "quantity": 1 }],
      "occurred_at": "2026-02-09T11:00:00Z",
      "status": "completed"
    },
    {
      "id": "adj_refund_1",
      "type": "refund",
      "description": "Refund for cancelled item",
      "line_items": [{ "id": "line_2", "quantity": 1 }],
      "amount": 32300,
      "occurred_at": "2026-02-09T11:05:00Z",
      "status": "completed"
    }
  ],
  "permalink_url": "https://merchant.example.com/orders/12345"
}

Example (return & refund): This example shows an order where the item was shipped, delivered, and then returned and refunded.

Version 2026-04-08

Key changes in this version in this example:

• Line items affected by a return now use "status": "removed" in the main line_items array.
• When line_items.status is removed:
  • The line_items.quantity.total is set to 0.
  • The original quantity is stored in the new line_items.quantity.original field.
• In adjustments of type return, the line_items.quantity field within the adjustment uses a negative value (e.g., -1) to indicate items being taken back.

Required Headers:

• Webhook-Id: adj_refund_2
• Webhook-Timestamp: 2026-02-10T10:00:00Z

{
  "ucp": {
    "version": "2026-04-08",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-04-08"}]
    }
  },
  "id": "order_03",
  "checkout_id": "checkout_03",
  "currency": "USD",
  "line_items": [
    {
      "id": "line_3",
      "item": {
        "id": "product_789",
        "title": "Wireless Earbuds",
        "price": 14900
      },
      "quantity": {
        "total": 0,  // Item removed from order total.
        "original": 1,  // Original quantity before removal.
        "fulfilled": 1 // Was fulfilled before return.
      },
      "totals": [
        {"type": "subtotal", "amount": 14900},
        {"type": "tax", "amount": 1200},
        {"type": "total", "amount": 16100}
      ],
      "status": "removed" // Item is cancelled, returned, or refunded.
    }
  ],
  "totals": [
    {"type": "subtotal", "amount": 14900},
    {"type": "tax", "amount": 1200},
    {"type": "total", "amount": 16100}
  ],
  "fulfillment": {
    "events": [
      {
        "id": "fulfill_evt_1",
        "occurred_at": "2026-02-05T09:00:00Z",
        "type": "shipped",
        "line_items": [{ "id": "line_3", "quantity": 1 }],
        "tracking_number": "987654321",
        "tracking_url": "https://fedex.com/track/987654321",
        "carrier": "FedEx",
        "description": "Item shipped"
      },
      {
        "id": "fulfill_evt_2",
        "occurred_at": "2026-02-07T16:00:00Z",
        "type": "delivered",
        "line_items": [{ "id": "line_3", "quantity": 1 }],
        "tracking_number": "987654321",
        "tracking_url": "https://fedex.com/track/987654321",
        "carrier": "FedEx",
        "description": "Item delivered"
      }
    ],
    "expectations": [{ "...": "..." }]
  },
  "adjustments": [
    {
      "id": "adj_return_1",
      "type": "return",
      "description": "Item not compatible",
      "line_items": [{ "id": "line_3", "quantity": -1 }],  // Uses a negative value (-1) to indicate a return.
      "occurred_at": "2026-02-09T09:00:00Z",
      "status": "completed"
    },
    {
      "id": "adj_refund_2",
      "type": "refund",
      "description": "Refund for returned item",
      "line_items": [{ "id": "line_3", "quantity": 1 }],
      "totals": [
        {"type": "subtotal", "amount": -14900}, // Negative amounts indicate money returned to the buyer.
        {"type": "tax", "amount": -1200},
        {"type": "total", "amount": -16100}
      ],
      "occurred_at": "2026-02-10T10:00:00Z",
      "status": "completed"
    }
  ],
  "permalink_url": "https://merchant.example.com/orders/67890"
}

Version 2026-01-23

{
  "ucp": {
    "version": "2026-01-23",
    "capabilities": {
      "dev.ucp.shopping.order": [{"version": "2026-01-23"}]
    }
  },
  "id": "order_03",
  "checkout_id": "checkout_03",
  "created_time": "2026-03-23T19:00:00Z",
  "line_items": [
    {
      "id": "line_3",
      "item": {
        "id": "product_789",
        "title": "Wireless Earbuds",
        "price": 14900
      },
      "quantity": { "total": 1, "fulfilled": 1 },
      "totals": [
        {"type": "subtotal", "amount": 14900},
        {"type": "tax", "amount": 1200},
        {"type": "total", "amount": 16100}
      ],
      "status": "fulfilled"
    }
  ],
  "totals": [
    {"type": "subtotal", "amount": 14900},
    {"type": "tax", "amount": 1200},
    {"type": "total", "amount": 16100}
  ],
  "fulfillment": {
    "events": [
      {
        "id": "fulfill_evt_1",
        "occurred_at": "2026-02-05T09:00:00Z",
        "type": "shipped",
        "line_items": [{ "id": "line_3", "quantity": 1 }],
        "tracking_number": "987654321",
        "tracking_url": "https://fedex.com/track/987654321",
        "carrier": "FedEx",
        "description": "Item shipped"
      },
      {
        "id": "fulfill_evt_2",
        "occurred_at": "2026-02-07T16:00:00Z",
        "type": "delivered",
        "line_items": [{ "id": "line_3", "quantity": 1 }],
        "tracking_number": "987654321",
        "tracking_url": "https://fedex.com/track/987654321",
        "carrier": "FedEx",
        "description": "Item delivered"
      }
    ],
    "expectations": [{ "...": "..." }]
  },
  "adjustments": [
    {
      "id": "adj_return_1",
      "type": "return",
      "description": "Item not compatible",
      "line_items": [{ "id": "line_3", "quantity": 1 }],
      "occurred_at": "2026-02-09T09:00:00Z",
      "status": "completed",
    },
    {
      "id": "adj_refund_2",
      "type": "refund",
      "description": "Refund for returned item",
      "line_items": [{ "id": "line_3", "quantity": 1 }],
      "amount": 16100,
      "occurred_at": "2026-02-10T10:00:00Z",
      "status": "completed"
    }
  ],
  "permalink_url": "https://merchant.example.com/orders/67890"
}

3. Recommended order update events

To provide the best user experience, we also recommend sending updates for the following events:

• Adjustment events:

  • dispute: When a customer disputes a charge.

• Fulfillment events:

  • canceled: When a fulfillment is canceled (sent within the fulfillment.events array).