Courier and parcel resellers
Where TNT ExpressConnect sits inside an existing multi-carrier offer or booking workflow.
TNT / FedEx integration transition
TNT ExpressConnect to FedEx REST API Migration Support
Still using TNT ExpressConnect or a legacy TNT shipping integration?
As TNT services continue moving into FedEx, businesses with older TNT integrations need to review how their booking, rating, label and tracking workflows will continue to operate.
Migration windows are often phased by account, with FedEx activation and TNT booking cutover happening on different dates. The exact timetable should be checked against current FedEx communications rather than assumed to be universal.
Warsash Software Engineering helps logistics businesses, courier resellers, e-commerce platforms and bespoke shipping systems migrate from legacy TNT integrations to modern FedEx REST API workflows.
Often a phased migration, not one single universal switch-over date.
Relevant to booking portals, warehouse tools, e-commerce shipping flows and
multi-carrier platforms.
Mapping usually spans credentials, service codes, labels, tracking events and customs
data.
Best handled as a workflow-preserving cutover for live shipping operations.
Why this migration matters
TNT ExpressConnect integrations are often deeply embedded inside operational systems. They may sit behind customer booking portals, warehouse dispatch tools, internal admin systems, e-commerce workflows or multi-carrier shipping platforms.
When TNT services and accounts move into FedEx, the technical impact is not limited to changing a logo or account number. The underlying integration may need to be reviewed, replaced, tested and cut over safely.
If your business relies on TNT ExpressConnect for shipment creation, labels, rating, tracking or international shipping workflows, now is the time to assess the migration path to FedEx REST APIs.
Who this service is for
Logistics companies
Where labels, tracking, rate logic and service rules need to remain stable during changeover.
Freight and parcel operators
Where TNT workflows are embedded in operational systems, admin tooling or customer portals.
Fulfilment providers
Where warehouse dispatch flows depend on reliable booking, labels and shipment status updates.
E-commerce shipping teams
Where bespoke checkout, post-purchase or order-management systems still rely on legacy TNT integration logic.
Shipping software vendors
Where SaaS platforms need FedEx-ready carrier support without breaking existing customer workflows.
Legacy platform owners
PHP, Laravel, .NET, Java and custom systems where the current integration is hard to inspect or change safely.
Inherited system teams
Businesses whose original developer is no longer available and who need a safe technical review before cutover.
Internal shipping software owners
Teams that need to preserve business rules, labels, service selection and reporting while moving to FedEx REST APIs.
What may need to be migrated
Account
and credential changes.
Rating
and service availability.
Shipment
creation.
Label
generation.
Consignment
and parcel data mapping.
Tracking
and shipment status updates.
Sender
and receiver address data.
Customs
and international shipment data.
Commercial
invoice workflows.
Exception
handling and operational reporting.
Customer-facing
booking portals.
Warehouse
and dispatch workflows.
TNT ExpressConnect vs FedEx REST APIs
Legacy TNT integrations were commonly built around older integration patterns and business-specific workflows.
FedEx REST APIs use a modern API structure and require a proper mapping exercise to ensure that existing TNT functionality is replaced safely. This may include changes to authentication, endpoints, request and response formats, service codes, error handling, label formats and operational assumptions.
A successful migration should preserve the business workflow, not just replace the technical transport layer. The FedEx REST API documentation is the right reference point for mapping the replacement integration.
| Legacy TNT / ExpressConnect area | FedEx REST API migration consideration |
|---|---|
| Account numbers and credentials | FedEx account and API credential setup. |
| Shipment creation | FedEx Ship API mapping and workflow replacement. |
| Labels | Label format, output and printer workflow testing. |
| Tracking | FedEx tracking event mapping and customer-facing status updates. |
| Service selection | FedEx service and rate availability review. |
| International data | Customs, commodity and invoice requirements. |
| Errors and exceptions | New response structures and operational error handling. |
Typical migration approach
1. Discovery
We review the existing TNT ExpressConnect implementation, including source code, credentials, services, labels, tracking and operational workflows.
2. Mapping
We identify which TNT functions are in use and map them to the appropriate FedEx REST API flows.
3. Build
We implement the new FedEx REST API integration while preserving the business rules your operation depends on.
4. Test
We test rates, shipment creation, labels, tracking, service rules, international shipments, error responses and edge cases.
5. Cutover
We support a controlled production switch from the legacy TNT integration to the new FedEx REST API implementation.
6. Support
We can provide post-cutover support, fixes and future carrier API maintenance.
Why use Warsash Software Engineering?
Warsash Software Engineering specialises in bespoke logistics software and carrier API integrations.
Chris Buckle has worked with parcel, courier and logistics platforms since 2006, including systems involving TNT, FedEx, DHL, DPD, Evri and other carrier services.
This is not generic API work. Carrier integrations involve real operational detail: service codes, account rules, labels, cut-off times, tracking events, customer portals, warehouse processes, address data, customs data, invoicing assumptions and exception handling.
Warsash Software Engineering is well suited to projects where TNT or FedEx functionality is embedded inside a custom platform, legacy codebase, booking portal, warehouse system or operational workflow.
Related migration services
TNT ExpressConnect is not the only carrier integration change affecting logistics platforms. Warsash Software Engineering also supports FedEx Web Services to REST API migrations and DHL eCommerce UK / UKMail Cloud API migrations.
Carrier API migration hub
View the wider carrier migration service, including DHL, FedEx and TNT-to-FedEx integration work.
View carrier migration servicesFedEx Web Services to REST API migration
If the same platform also relies on FedEx Web Services, review the separate retirement-driven migration path and official FedEx guidance.
View FedEx migration supportDHL eCommerce UK / UKMail Cloud API migration
If your estate also includes DHL eCommerce UK or UKMail, review the separate Cloud API migration route and published DHL deadline.
View DHL / UKMail migration supportNeed help migrating from TNT ExpressConnect to FedEx REST APIs?
Warsash Software Engineering can review your current TNT integration, identify the FedEx REST API replacement work required, build the migration and support the production cutover.
Get in touch to arrange a technical migration review.
If you prefer email first, contact [email protected].