Fulfillment

Acknowledge receipt of orders.

PUT/fulfillment/distribution_centers/{distribution_center_code}/acknowledgements

Acknowledge receipt of orders so that they are removed from the fulfillment queue.

Generate a packing slip for this order for the given distribution center.

GET/fulfillment/distribution_centers/{distribution_center_code}/orders/{order_id}

The packing slip PDF that is returned is base 64 encoded

Mark orders as shipped

POST/fulfillment/distribution_centers/{distribution_center_code}/shipments

Store the tracking information and mark the order shipped for this distribution center.

Retrieve distribution centers

GET/fulfillment/distribution_centers

Retrieves the distribution centers that this user has access to.

Retrieve orders queued up for this distribution center.

GET/fulfillment/distribution_centers/{distribution_center_code}/orders

Retrieves up to 100 orders that are queued up in this distribution center.

Update inventory

POST/fulfillment/distribution_centers/{distribution_center_code}/inventory

Update the inventory for items associated with this distribution center

Webhooks

The following webhook events are available for this resource. See Webhooks for how delivery, retries, and versioning work.

Event	Description	Reflow	Expandable
fulfillment_hold	Fired when an order is held for review	—	—
fulfillment_transmit	Fired to transmit an order to the fulfillment house	—	—

Receiving these events

• Payload: each delivery is a POST whose JSON body is an array of events, even when it carries one. Each element has a single key, the event name, whose value is the object, for example [{"fulfillment_hold": {...}}].
• Contents: the object includes only the parts in the webhook's expansion. Expansions appear when you edit the webhook after creating it.
• Respond within 30 seconds. Store or queue the payload and do the work in a background job.
• Batching: one delivery can bundle several events. The webhook sets how many (10 or more) and the maximum payload size (up to 900K).
• HTTPS: use it. It is required whenever the payload includes customer information.
• Testing: the webhook's test button sends a delivery, and its log shows each one. To resend existing records, for example to backfill a new receiver, request a reflow.

More: Webhooks, Creating a simple webhook (with a sample payload), receiver samples in PHP and Python