account6

addresses1

batches12

carriers7

checkout_rates9

connections4

delivery_predictions1

documents9

downloads1

freight12

fulfillments2

inventory12

labels13

mailing3

manifests4

package_pickups4

package_types5

products5

purchase_orders9

rate_shoppers2

rates4

service_points2

shipments18

suppliers4

tags5

tokens1

totes6

tracking3

users1

warehouses6

webhooks5

package_types

Create custom package type

Changed on Oct 22, 2026

<aside class="access" aria-label="Endpoint access"> <table class="access__table"> <thead> <tr> <th class="access__table-header">Products</th> <th class="access__table-header">Plans</th> </tr> </thead> <tbody> <tr> <td class="access__table-cell access__product"> <img class="access__logo" src="/static/logos/shipstation-api-logo.svg" alt="ShipStation API Logo" loading="lazy" decoding="async"/> <div class="access__sub">Formerly ShipEngine</div> </td> <td class="access__table-cell access__plans"> <a href="/apis/@shipstation-v2/docs/getting-started/plans/shipstation-api-free.md" class="access__plan">Free</a> <a href="/apis/@shipstation-v2/docs/getting-started/plans/shipstation-api-advanced-enterprise.md" class="access__plan">Advanced</a> <a href="/apis/@shipstation-v2/docs/getting-started/plans/shipstation-api-advanced-enterprise.md" class="access__plan">Enterprise</a> </td> </tr> <tr> <td class="access__table-cell"> <img class="access__logo" src="/static/logos/shipstation-logo.svg" alt="ShipStation Logo" loading="lazy" decoding="async"/> </td> <td class="access__table-cell access__plans"> <a href="/apis/@shipstation-v2/docs/getting-started/plans/shipstation-free-starter.md" class="access__plan access__plan--off">Free</a> <a href="/apis/@shipstation-v2/docs/getting-started/plans/shipstation-free-starter.md" class="access__plan access__plan--off">Starter</a> <a href="/apis/@shipstation-v2/docs/getting-started/plans/shipstation-standard-premium.md" class="access__plan">Standard</a> <a href="/apis/@shipstation-v2/docs/getting-started/plans/shipstation-standard-premium.md" class="access__plan">Premium</a> </td> </tr> </tbody> </table> <footer class="access__footer"> <a class="access__help" href="/apis/@shipstation-v2/docs/getting-started/products-and-plans.md"> Learn about products and plans <img src="/static/icons/external-link.svg" alt="External Link Icon" style="width: 16px;" loading="lazy" decoding="async"/> </a> </footer> </aside>

Create a custom package type to better assist in getting accurate rate estimates

post/v2/packages

Request

Base URL
https://api.shipstation.com
URL
https://api.shipstation.com/v2/packages
Auth
API key in header api-key

Request body

package_idstring

A string that uniquely identifies a ShipStation resource, such as a carrier, label, shipment, etc.

package_codestring required

A [package type] , such as thick_envelope, small_flat_rate_box, large_package, etc. Use the code package for custom or unknown package types.

namestring required

descriptionstring nullable

Provides a helpful description for the custom package.

Example request

{
  "package_id": "se-28529731",
  "package_code": "small_flat_rate_box",
  "name": "laptop_box",
  "dimensions": {
    "length": 2,
    "width": 2,
    "height": 1
  },
  "description": "Packaging for laptops"
}

Response

The request was a success.