02Our Integration Process
From Carrier Setup to Live Sync in Five Steps
You see exactly how rate shopping, labels, and tracking will work before development starts, not just a finished integration at the end.
05Projects We've Built
Ecommerce Projects We Have Built
A selection of Shopify and ecommerce builds shipped for clients, several involving shipping and fulfillment logic like this one.
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06What Our Clients Say
What Clients Say After Launch
Feedback from ecommerce teams we have built shipping integrations for.
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We had a different kind of problem. People were visiting the store, adding products to their carts, and then disappearing before they finished the order. We had tried a few apps and made changes here and there, but nothing really seemed to solve the bigger issue. The team went through the shopping experience with us and pointed out things we hadn't really noticed ourselves. They cleaned up the cart and checkout flow, made the mobile experience much smoother, and helped us make the store feel easier to shop. I’m not going to pretend we fixed everything overnight, but it finally feels like the store is helping the sale instead of getting in the way of it.
Ethan Parker
Founder of Elite Academy
The mobile experience is probably my favourite part of the new site. We had spent a lot of time making sure the desktop version looked right, and the team kept pushing us to think about how everything would actually feel on a phone too. They were right. The navigation is clean, the interactions feel natural, and everything we’ve tested so far works exactly as it should. They also went through the links, forms, integrations, and other details more than once before launch, which I really appreciated. And even after going live, we could still reach out when something came up. The whole process felt friendly, organised, and surprisingly straightforward.
James Whitmore
Head of Marketing of Lumen Outdoor
We had a pretty specific idea of what we wanted our website to become, but I wasn’t sure how easily we could explain all of it to a development team. There were quite a few moving parts, and we were working toward a deadline, so I expected a few things to get lost along the way. That never really happened. They understood what we were trying to achieve, kept us updated throughout the process, and got everything ready within the agreed timeline. The final site feels much easier to navigate, works beautifully on mobile, and is noticeably smoother for our customers. It was a huge relief seeing the original idea actually turn into the website we had in mind.
Michael Bennett
Founder & CEO of Northbridge Consulting
150+
Projects shipped
10+
Years in development
Top 3%
Upwork Top Rated Plus
5★
Average review score
07Work Culture
Why Businesses Trust Us With Shipping API Integration
Getting a carrier rate or label wrong means delivery delays or overcharged customers, so the integration has to hold up across every carrier you use. These are the habits we bring to every project.
Right carriers, not more carriers
We scope the integration to the carriers and rules your business actually uses.
Rate shopping built in
Automatic comparison across carriers so the best rate or speed wins by default.
Fewer failed deliveries
Address validation before a label is created, not after a package bounces back.
Tracking that reaches customers
Normalized tracking events synced back to your store and customers automatically.
Tested before it's live
Sandbox testing with real shipment scenarios before your live store is touched.
Built to be maintained
Documentation and an optional retainer so the integration keeps working as carriers update their APIs.
08Overview
Who builds custom shipping carrier API integrations for ecommerce stores?
DeveloperLook builds custom shipping API integrations connecting UPS, FedEx, USPS, DHL and multi-carrier platforms like Shippo or ShipEngine, automating rate comparison, label generation, address validation, and real-time tracking sync. We can also feed shipping cost and delivery data into your dashboard or accounting system. Projects start from $1,499, most complete in 2 to 5 weeks, scoped to the carriers you actually need.
- Service
- Custom shipping carrier API integration development
- Starting price
- From $1,499 USD, fixed scope after a project brief
- Typical timeline
- 2 to 5 weeks
- Platform
- Shopify, WooCommerce, BigCommerce
- Built with
- UPS, FedEx, USPS, DHL and multi-carrier APIs (Shippo, ShipEngine, EasyPost), store order APIs
- Experience
- 10+ years and 150+ shipped projects
- Post-launch support
- 30 days included, then optional retainer
- Communication
- Calls in US, UK, and AU business hours
Who it's for
Stores using manual carrier portals
Someone is logging into UPS, FedEx, or USPS websites separately to check rates and print labels for every order.
Businesses needing multi-carrier rate shopping
You want the cheapest or fastest carrier picked automatically for each order instead of defaulting to one carrier.
Stores needing address validation
Failed deliveries or address correction fees are costing you money and you want addresses checked before a label is even created.
Businesses wanting tracking synced automatically
You want tracking numbers and delivery status pushed back to customers and your store without manual lookups.
Businesses feeding shipping data into dashboards or accounting
You want shipping cost and delivery performance showing up in your reporting or accounting system automatically.
Not a fit for
You already use ShipStation and just need it connected to your store. Our Shopify ShipStation Integration service covers that.
You need outsourced fulfillment through a 3PL rather than carrier API access for in-house shipping. Our Shopify 3PL Integration service covers that.
You need a customer-facing branded tracking page rather than backend carrier API access. Our Shopify Order Tracking Page service covers that.
You're dropshipping and need supplier order and tracking sync instead of your own carrier accounts. Our Dropshipping Supplier API Integration service covers that.
11The Right Technology for Your Project
Technology Stack
We build against carrier and multi-carrier APIs alongside your store's order API, matched to the carriers and rules your business needs.
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12FAQ
Frequently Asked Questions
Straight answers on shipping API integration, rate shopping, and carrier tracking sync.
Which carriers can you integrate (UPS, FedEx, USPS, DHL)?
Yes, we integrate directly with UPS, FedEx, USPS, and DHL, or connect through a multi-carrier platform like Shippo or ShipEngine when you want rate shopping across all of them from one API.
How does rate shopping and label creation work through an API?
We submit shipment details once and the API returns live rates from each connected carrier, you or a rule picks the best option, and a label is generated in the carrier's format automatically, no manual portal logins.
How do tracking updates flow back to my store?
Carrier tracking events come in through webhooks and we normalize them into a consistent status your store and customers see, rather than each carrier's own tracking format.
How much does a shipping API integration cost?
Projects typically start from $1,499 for a single carrier or multi-carrier platform connection, and scale up with address validation, custom routing rules, or dashboard feeds. You get a fixed quote after reviewing your carriers.
Can you integrate ShipBob, Shippo or ShipStation with my platform?
Yes, we've built integrations with Shippo, ShipEngine, EasyPost, and ShipStation, and can connect ShipBob's fulfillment API where 3PL warehousing is also involved.
How long does a carrier integration take?
Most projects take 2 to 5 weeks depending on how many carriers, rules, and downstream systems are involved.
Can you add address validation and multi-carrier rules?
Yes, we validate addresses before a label is created to cut failed deliveries and correction fees, and can set rules like cheapest rate, fastest delivery, or carrier by destination or weight.
Can shipping data feed my dashboard and accounting?
Yes, we can push shipping cost, carrier performance, and delivery data into your reporting dashboard or accounting system so it's not sitting only in the carrier's portal.