Live rates at checkout
Your customers see real carrier prices at checkout, with backup rates if a carrier is slow.
The Problem
Three Carrier Portals and a Copy and Paste for Every Order
It shows up once your orders outgrow one carrier and one portal. Rates, labels, and tracking live on carrier websites, and your store only knows what someone types back in.
01 · Tab juggling
Someone opens UPS, FedEx, and USPS in separate tabs daily.
UPS, FedEx, USPS, or DHL connect to your orders through their APIs.
02 · Address typos
A wrong apartment number means a fee or a returned parcel.
Each address gets checked before its label prints.
03 · Tracking paste
Tracking numbers get pasted back into Shopify by hand.
Carrier events update your orders and trigger shipping emails automatically.
04 · Flat rates
Flat checkout rates mean heavy orders ship at a loss.
Checkout shows live carrier rates, so customers pay what shipping costs.
Every morning, someone opens UPS, FedEx, and USPS in three tabs. They copy each order's address and weight, compare prices by eye, and print labels one at a time. Then they paste tracking numbers back into Shopify. A typo in an apartment number means a correction fee or a parcel back at your door. Checkout still shows flat rates, so heavy orders ship at a loss.
We start by writing down your carriers, parcel sizes, and the rules your team keeps in its head. Then we connect UPS, FedEx, USPS, or DHL to your checkout and orders through their APIs. Checkout shows live rates, labels print from the order after an address check, and tracking flows back on its own. Your team packs parcels instead of typing.
Real rates at checkout
Customers pay what the carrier charges you, not a flat guess.
Labels without portals
Each label prints from the order, with the address checked first.
Tracking your customers see
Carrier events update your orders, and your customers get shipping emails automatically.
Our Carrier Integration Process
From Carrier Accounts to Live Labels in Five Clear Steps
You see the carrier rules, the sandbox labels, and the launch plan before a live label is bought. Nothing moves forward until you've checked it.
We review your carriers, negotiated rates, order volume, and how labels get made today. You leave with a carrier plan and a fixed quote. If Shopify Shipping or a shipping app already covers your case, we'll tell you before we quote.
What's Included
What You Get With Custom Shipping Integration Software
Every plan covers labels, address checks, and tracking for your carriers. Larger plans add live checkout rates, rate shopping, warehouse routing, and cost reporting.
Compare Options
DeveloperLook vs a Shipping App vs Built-In Store Labels
Built-in labels suit stores with simple parcels, and a shipping app suits teams that print from one dashboard. We fit when your rates, carriers, or systems need custom rules.
| Feature | DeveloperLookBest fit | Shipping app | Built-in labels |
|---|---|---|---|
| Upfront cost | From $850, fixed scope | Monthly plan | No setup fee |
| Setup time | 2 to 6 weeks | Same day | Within minutes |
| Carrier choice | Any carrier with an API | Many carriers built in | Set carrier list |
| Routing rules | Built to your rules | Preset automation rules | Basic settings |
| Connected systems | ERP, 3PL, and dashboards | Many app connectors | Store only |
| Testing before launch | Carrier sandbox first | You test it | You test it |
| Ongoing cost | Hosting plus carrier fees | Monthly plan plus labels | Label costs only |
| Code ownership | Yours, with documentation | Stays with the vendor | Stays with the platform |
DeveloperLook
Shipping app
- Upfront cost
- DeveloperLook: From $850, fixed scopeShipping app: Monthly plan
- Setup time
- DeveloperLook: 2 to 6 weeksShipping app: Same day
- Carrier choice
- DeveloperLook: Any carrier with an APIShipping app: Many carriers built in
- Routing rules
- DeveloperLook: Built to your rulesShipping app: Preset automation rules
- Connected systems
- DeveloperLook: ERP, 3PL, and dashboardsShipping app: Many app connectors
- Testing before launch
- DeveloperLook: Carrier sandbox firstShipping app: You test it
- Ongoing cost
- DeveloperLook: Hosting plus carrier feesShipping app: Monthly plan plus labels
- Code ownership
- DeveloperLook: Yours, with documentationShipping app: Stays with the vendor
Projects We've Built
Ecommerce Projects We Have Built
A selection of ecommerce stores and apps we've built. Carrier work builds on the same base: tidy order data, tested API calls, and a calm launch.
Havenly Furniture Ecommerce Website
- Furniture
- E-commerce
- Dashboard
Modeverse Ecommerce Web Design & Development
- Fashion
- Retail
- E-commerce
Sefinix Furniture Ecommerce Store and Dashboard
- Furniture
- Dashboard
- E-commerce
UrbanNest Furniture Ecommerce App and Admin Dashboard
- Business
- Furniture
- E-commerce
What Our Clients Say
What Clients Say After Launch
Feedback from ecommerce teams we have built stores, integrations, and automation for.
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.
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.
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.
1,000+
Projects shipped
10+
Years of experience
Top 3%
Upwork Top Rated Plus
5 stars
Average review score
Work Culture
Why Shipping Teams Trust Us With Their Carriers
Shipping mistakes show up on a customer's doorstep, so every rule gets tested on real past orders first. These habits keep your labels right.
Rates that answer in seconds
Shopify waits at most 3 to 10 seconds for a rate callback, then shows backup rates, per its developer docs. We cache carrier rates, so shoppers see real prices, not fallbacks.
Carrier APIs kept current
USPS retired its Web Tools APIs on January 25, 2026, and UPS now requires OAuth 2.0. We build on the current carrier APIs, so a retirement date doesn't stop your labels.
Addresses checked before labels
A wrong unit number costs a correction fee or a returned parcel. We validate every address through the carrier or a verification API before any label is bought.
Your plan checked before we quote
Live carrier rates at checkout need Shopify's Advanced or Plus plan, or a paid add-on or annual billing on Grow, per Shopify's help center. We check your plan first, so no upgrade surprises you.
Sandbox labels first
We buy test labels in each carrier's sandbox from your real past orders. Rate or service mistakes surface there, not on a customer's doorstep.
Your carrier accounts, your keys
Carrier credentials, code, and logs sit in accounts you control, and the documentation is yours. A new developer can pick it up without starting over.
Overview
How does a shipping API integration work?
DeveloperLook builds shipping API integration for online stores, connecting UPS, FedEx, USPS, DHL, or a multi-carrier platform to Shopify, WooCommerce, or BigCommerce. We set up live checkout rates, labels, address checks, and tracking updates. Projects start at $850, one carrier goes live in 2 to 3 weeks, and the carrier accounts stay yours.
DEVELOPERLOOK
Project facts · Shipping API Integration
- Service
- Shipping API Integration (live rates, labels, address checks, tracking)
- Typical timeline
- 2 to 3 weeks for one carrier, 4 to 6 weeks for multi-carrier rules
- Platforms
- Shopify, WooCommerce, BigCommerce, UPS, FedEx, USPS, and DHL
- Built with
- Carrier REST APIs, Shippo or EasyPost, webhooks, Node.js, and PHP
- Experience
- 10+ years of development experience and 1,000+ shipped projects
- Post-launch support
- 30 to 90 days, depending on plan
- Communication
- Calls in US, UK, and AU business hours
- Starting price
- From $850 USD, fixed scope after a free shipping review
Reviewed 28 Sep 2026 by Saimul Islam
Good fit
Stores printing labels in carrier portals
You copy each order into the UPS or FedEx site, print the label, and paste tracking back into your Shopify admin by hand.
WooCommerce stores needing live rates
Your WooCommerce store charges flat shipping, and you want a WooCommerce shipping API integration that shows real carrier prices at checkout.
Brands shipping with several carriers
You ship light parcels with USPS and heavy ones with UPS, and you want the cheaper service picked for each order.
Teams whose old shipping plugin broke
Your old plugin stopped printing labels when USPS retired Web Tools or UPS moved to OAuth, and orders are piling up.
Agencies building stores for clients
Your client needs custom carrier rules on their store, and you want a partner who builds the shipping work under your brand.
Not a fit
A few parcels a week
You ship a few parcels a week with one carrier. Shopify Shipping or a shipping app covers labels for less than our $850 starting price.
ShipStation already in use
You already use ShipStation and only need it connected to your Shopify admin. Our Shopify ShipStation Integration service covers that.
Outsourced fulfillment
You want a 3PL to pick, pack, and ship for you. Our Shopify 3PL Integration service fits outsourced fulfillment better.
Branded tracking page
You want a branded page where customers follow their orders. Our Shopify Order Tracking Page service builds that page.
Not sure we're the right fit?
Send a two-line brief. We'll tell you honestly whether we're the right team.
Pricing
Transparent Starting Prices for Shipping API Integration
These are starting points in USD. Your final price depends on carriers, warehouses, and checkout rules, and you get a fixed proposal after a free shipping review.
For stores that ship with one carrier and want labels and tracking without portal logins.
$850one-time, USD
- Free shipping review and carrier rules
- One carrier or multi-carrier account
- Labels created from store orders
- Address validation before each label
- Tracking pushed back to each order
- 30 days of support
Recommended
For stores that want live checkout rates and the right carrier picked for each order.
$2,200one-time, USD
- Everything in Single Carrier Setup
- Up to 4 carriers connected
- Live carrier rates at checkout
- Rate shopping by weight, zone, or date
- Return labels and backup rates
- 60 days of support
For brands shipping from several warehouses or abroad that need shipping costs in their reports.
$4,200one-time, USD
- Everything in Multi-Carrier Rates
- Routing across up to 3 warehouses
- Customs forms for international parcels
- ShipBob or 3PL order handoff
- Shipping costs sent to accounting
- 90 days of support
For Agencies
White-Label Carrier Integrations for Agencies and Studios
You own the client relationship. We supply the carrier work behind it: rate rules, label and tracking APIs, sandbox testing, and documentation. The client sees your agency's name on every deliverable, not ours.
How the partnership works
White label: your client only ever sees your brand
- Your client
- You, the agency
- DeveloperLook
Share the client brief
Send the client's store, carriers, parcel profile, and shipping rules.
- Client needs
- You share the details
- Details received
We scope and quote
You get the carrier rules, delivery dates, and one fixed quote.
- Scope and plan
- Proposal to resell
- Your quoteYOUR LOGO
Build and hand off
We build, test labels in carrier sandboxes, and document it under your brand.
- Done by our team
- Your brand on it
- Handed to your clientDone
Partner with DeveloperLookDelivered under your brand
Stay client-facing
We work under your brand, so the client relationship stays yours.
Predictable delivery
A fixed price and carrier rules the client signs off first.
Current carrier APIs
Builds use today's OAuth-based UPS, FedEx, and USPS APIs.
Flexible capacity
Bring us in for one carrier or a multi-warehouse rollout.
The Right Technology for Your Project
Technology Stack
We build on the carriers' current REST APIs, with your own credentials, and connect them to the store and reporting tools you already use.
UPS
FedEx
USPS
DHL
Shopify
WooCommerce
BigCommerce
WordPress
Xero
QuickBooks
Google Sheets
Power BI
Node.js
PHP
PostgreSQL
AWS
FAQ
Frequently Asked Questions
Straight answers on how rates and labels work, cost, timelines, carriers, and when an app is enough.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
Rate shopping sends the parcel's weight, size, and addresses to each carrier's rating API and compares the prices that come back. Your rules pick a service, and the carrier's label API buys the label in its own format. The label, tracking number, and cost then save to the order automatically.
Tracking updates flow back through carrier webhooks or scheduled tracking calls, depending on the carrier. Each event, like picked up, in transit, or delivered, updates your order's fulfillment status. Shopify or WooCommerce then sends your own shipping emails, so customers follow progress without a carrier login.
Custom carrier integrations start at $850 for one carrier: labels, address validation, and tracking back to your orders. Multi-carrier rate shopping with live checkout rates costs $2,200. Builds with warehouse routing, customs forms, and cost feeds to accounting cost $4,200. Your carriers keep billing label fees as usual.
Expect 2 to 3 weeks for one carrier, from the review to launch. Multi-carrier rules with live checkout rates take 4 to 6 weeks. Carrier credential approvals can add a few days, so we request your API access in the first week and build against the sandboxes meanwhile.
We integrate UPS, FedEx, USPS, and DHL directly, plus Canada Post, Australia Post, and regional carriers with an API. USPS retired Web Tools on January 25, 2026, so we build on its new OAuth-based APIs. A multi-carrier platform can cover smaller carriers through one connection.
Yes, Shippo, ShipStation, and ShipBob all have APIs we connect to your Shopify, WooCommerce, or BigCommerce store. Shippo and EasyPost work well as one rating and label layer across carriers. ShipStation suits teams that print from its dashboard, and ShipBob fits when a 3PL ships for you, with orders and tracking synced.
Yes, every address can be checked before a label is bought, through the carrier's validation API or a platform like Shippo. Multi-carrier rules then pick the service by weight, destination, delivery date, or cost. Addresses that fail validation go to a review queue instead of getting a guessed label.
Yes, every label's carrier, service, cost, and delivery time can feed your dashboard and accounting. Shipping costs post to Xero or QuickBooks as expense lines, and delivery data goes to Google Sheets or Power BI. You see cost per order and late deliveries by carrier without exporting portal reports.
An app will do for many stores that ship with 1 or 2 carriers and standard services. An off-the-shelf shipping software integration costs less and sets up fast. A custom build pays off when rates follow your own rules, your carriers aren't in the app, or labels must reach an ERP, 3PL, or dashboard.
You get 30 to 90 days of support after launch, depending on the plan. We fix failed labels, update rules when you add a carrier or warehouse, and handle carrier API changes like the recent USPS and UPS moves. Afterward, your team follows the runbook we hand over, or books us for ongoing help.
Saimul IslamFounder & CEO, DeveloperLookStill have questions?
Send a message or book a call with the team.
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