3PL Shipping API

Effortless shipping for your 3PL business

Give your customers access to 100+ carriers through a single integration and streamline your ecommerce fufilment operations.


Grow your ecommerce 
customer base

Generate shipping labels

Use webhooks to automatically push new orders that are ready for shipping.

Compare Carrier Rates

Save costs by getting shipping rates and choosing the cheapest option.

Validate shipping addresses

Validate addresses, reducing failed deliveries and costs associated with address queries.

Segment Client Accounts

Use our partner API to create customer accounts and allocate carrier and shipment data.


Give your customers access to 100+ local and international carriers with a single integration. Increase your revenue by enabling them to ship greater volume without headaches or maintenance costs.

Integrate With Carriers

Reduce shipping costs for your merchants

Provide real-time carrier rates for your customers, enabling them to select the best-priced option for every shipment.

Empower them to make the best choice for their business, while reducing their cost-to-serve.

Compare Carrier Rates

Make cross-border shipping easy

Enable your customers to scale internationally and effortlessly ship cross-border, with the ability to ship from multiple countries in a single platform.

Easily generate customs documents including paperless trade forms, commercial invoices and CN23s.

Ship Cross-Border

Why 3PLs need a Shipping API

Easily connect to order sources

Connect to your retailers’ order sources, including Amazon, Ebay, Shopify and more. 

Simplify 3PL account management 

Create sub accounts to easily manage customer data, such as carrier accounts and shipments. 

Remove integration headaches

Access over 100 carriers through a single integration, reducing maintenance effort and costs. 

Provide timely tracking updates

With our tracking webhooks, you can easily provide consistent, timely tracking status updates across any carrier we support. 

Ship with complete confidence

With 99.99% uptime and highly performant APIs, ShipEngine eliminates processing delays.